MAX200

MAX220 MAXIM | Alldatasheet

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Technical content

The MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communica- tions interfaces, particularly applications where ±12V is not available. These parts are especially useful in battery-powered sys- tems, since their low-power shutdown mode reduces power dissipation to less than 5µW. The MAX225, MAX233, MAX235, and MAX245/MAX246/MAX247 use no external components and are recommended for appli- cations where printed circuit board space is critical. Portable Computers Low-Power Modems Interface Translation Battery-Powered RS-232 Systems Multidrop RS-232 Networks Next-Generation Device Features ♦ For Low-Voltage, Integrated ESD Applications MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E: +3.0V to +5.5V, Low-Power, Up to 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors (MAX3246E Available in a UCSP™ Package) ♦ For Low-Cost Applications MAX221E: ±15kV ESD-Protected, +5V, 1µA, Single RS-232 Transceiver with AutoShutdown™ MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Selection Table 19-4323; Rev 15; 1/06 PART MAX220CPE MAX220CSE MAX220CWE 0°C to +70°C 0°C to +70°C 0°C to +70°C TEMP RANGE PIN-PACKAGE

16 Plastic DIP

16 Narrow SO

16 Wide SO

MAX220C/D 0°C to +70°C Dice* MAX220EPE MAX220ESE MAX220EWE -40°C to +85°C -40°C to +85°C -40°C to +85°C 16 Plastic DIP MAX220EJE -40°C to +85°C 16 CERDIP MAX220MJE -55°C to +125°C 16 CERDIP Power No. of Nominal SHDN Rx Part Supply RS-232 No. of Cap. Value & Three- Active in Data Rate Number (V) Drivers/Rx Ext. Caps (µF) State SHDN (kbps) Features MAX220 +5 2/2 4 0.047/0.33 No — 120 Ultra-low-power, industry-standard pinout MAX222 +5 2/2 4 0.1 Yes — 200 Low-power shutdown MAX223 (MAX213) +5 4/5 4 1.0 (0.1) Yes ✔ 120 MAX241 and receivers active in shutdown MAX225 +5 5/5 0 — Yes ✔ 120 Available in SO MAX230 (MAX200) +5 5/0 4 1.0 (0.1) Yes — 120 5 drivers with shutdown MAX231 (MAX201) +5 and 2/2 2 1.0 (0.1) No — 120 Standard +5/+12V or battery supplies; +7.5 to +13.2 same functions as MAX232 MAX232 (MAX202) +5 2/2 4 1.0 (0.1) No — 120 (64) Industry standard MAX232A +5 2/2 4 0.1 No — 200 Higher slew rate, small caps MAX233 (MAX203) +5 2/2 0 — No — 120 No external caps MAX233A +5 2/2 0 — No — 200 No external caps, high slew rate MAX234 (MAX204) +5 4/0 4 1.0 (0.1) No — 120 Replaces 1488 MAX235 (MAX205) +5 5/5 0 — Yes — 120 No external caps MAX236 (MAX206) +5 4/3 4 1.0 (0.1) Yes — 120 Shutdown, three state MAX237 (MAX207) +5 5/3 4 1.0 (0.1) No — 120 Complements IBM PC serial port MAX238 (MAX208) +5 4/4 4 1.0 (0.1) No — 120 Replaces 1488 and 1489 MAX239 (MAX209) +5 and 3/5 2 1.0 (0.1) No — 120 Standard +5/+12V or battery supplies; +7.5 to +13.2 single-package solution for IBM PC serial port MAX240 +5 5/5 4 1.0 Yes — 120 DIP or flatpack package MAX241 (MAX211) +5 4/5 4 1.0 (0.1) Yes — 120 Complete IBM PC serial port MAX242 +5 2/2 4 0.1 Yes ✔ 200 Separate shutdown and enable MAX243 +5 2/2 4 0.1 No — 200 Open-line detection simplifies cabling MAX244 +5 8/10 4 1.0 No — 120 High slew rate MAX245 +5 8/10 0 — Yes ✔ 120 High slew rate, int. caps, two shutdown modes MAX246 +5 8/10 0 — Yes ✔ 120 High slew rate, int. caps, three shutdown modes MAX247 +5 8/9 0 — Yes ✔ 120 High slew rate, int. caps, nine operating modes MAX248 +5 8/8 4 1.0 Yes ✔ 120 High slew rate, selective half-chip enables MAX249 +5 6/10 4 1.0 Yes ✔ 120 Available in quad flatpack package For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

Ordering Information continued at end of data sheet. *Contact factory for dice specifications. AutoShutdown and UCSP are trademarks of Maxim Integrated Products, Inc.

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243 ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (VCC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, TA = TMIN to TMAX‚ unless otherwise noted.) Note 1: For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V. Note 2: Input voltage measured with TOUT in high-impedance state, SHDN or VCC = 0V. Note 3: Maximum reflow temperature for the MAX233A is +225°C. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Input Voltages T Output Voltages Continuous Power Dissipation (T A = +70°C) 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW 18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)..889mW 20-Pin Plastic DIP (derate 8.00mW/°C above +70°C) ..440mW 16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ...696mW Operating Temperature Ranges PARAMETER CONDITIONS MIN TYP MAX UNITS RS-232 TRANSMITTERS Output Voltage Swing All transmitter outputs loaded with 3k Ω to GND ±5 ±8 V Input Logic Threshold Low 1.4 0.8 V All devices except MAX220 2 1.4Input Logic Threshold High MAX220: VCC = 5.0V 2.4 V All except MAX220, normal operation 5 40 Logic Pullup/lnput Current SHDN = 0V, MAX222/MAX242, shutdown, MAX220 ±0.01 ±1 µA VCC = 5.5V, SHDN = 0V, VOUT = ±15V, MAX222/MAX242 ±0.01 ±10 VOUT = ±15V ±0.01 ±10Output Leakage Current VCC = SHDN = 0V MAX220, VOUT = ±12V ±25 µA Data Rate 200 116 kbps Transmitter Output Resistance V CC = V+ = V- = 0V, VOUT = ±2V 300 10M Ω VOUT = 0V ±7 ±22Output Short-Circuit Current V OUT = 0V MAX220 ±60 mA RS-232 RECEIVERS ±30RS-232 Input Voltage Operating Range MAX220 ±25 V All except MAX243 R2IN 0.8 1.3RS-232 Input Threshold Low V CC = 5V MAX243 R2 IN (Note 4) -3 V All except MAX243 R2IN 1.8 2.4RS-232 Input Threshold High V CC = 5V MAX243 R2 IN (Note 4) -0.5 -0.1 V

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Note 4: MAX243 R2OUT is guaranteed to be low when R2IN is ≥ 0V or is floating. ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued) (VCC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, TA = TMIN to TMAX‚ unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS All except MAX220/MAX243, VCC = 5V, no hysteresis in SHDN 0.2 0.5 1.0 MAX220 0.3RS-232 Input Hysteresis MAX243 1 V 35 7RS-232 Input Resistance T A = +25°C (MAX220) 35 7 KΩ TTL/CMOS Output Voltage High I OUT = -1.0mA 3.5 V CC - 0.2 V Sourcing VOUT = GND -2 -10TTL/CMOS Output Short-Circuit Current Shrinking VOUT = VCC 10 30 mA TTL/CMOS Output Leakage Current SHDN = VCC or EN = VCC (SHDN = 0V for MAX222), 0V ≤ VOUT ≤ VCC ±0.05 ±10 µA EN Input Threshold Low MAX242 1.4 0.8 V EN Input Threshold High MAX242 2.0 1.4 V Operating Supply Voltage 4.5 5.5 V MAX220 0.5 2 No load MAX222/MAX232A/MAX233A/ MAX242/MAX243 41 0 MAX220 12 VCC Supply Current (SHDN = VCC), figures 5, 6, 11, 19 3kΩ load both inputs MAX222/MAX232A/MAX233A/ MAX242/MAX243 15 µA TA = +25°C 0.1 10 TA = 0°C to +70°C 2 50 TA = -40°C to +85°C 2 50Shutdown Supply Current MAX222/ MAX242 TA = -55°C to +125°C 35 100 µA SHDN Input Leakage Current MAX222/MAX242 ±1 µA SHDN Threshold Low MAX222/MAX242 1.4 0.8 V SHDN Threshold High MAX222/MAX242 2.0 1.4 V MAX222/MAX232A/MAX233/ MAX242/MAX243 61 23 0 Transition Slew Rate CL = 50pF to 2500pF, RL = 3kΩ to 7kΩ, VCC = 5V, TA = +25°C, measured from +3V to -3V or -3V MAX220 1.5 3 30.0 V/µs MAX222/MAX232A/MAX233/ MAX242/MAX243 1.3 3.5tPHLT MAX220 4 10 MAX222/MAX232A/MAX233/ MAX242/MAX243 1.5 3.5 Transmitter Propagation Delay TLL to RS-232 (Normal Operation), Figure 1 tPLHT MAX220 5 10 µs

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243 -10 05 1 5 2 5 OUTPUT VOLTAGE vs. LOAD CURRENT MAX220-01 LOAD CURRENT (mA) OUTPUT VOLTAGE (V) 0.1µF EITHER V+ OR V- LOADED VCC = ±5V NO LOAD ON TRANSMITTER OUTPUTS (EXCEPT MAX220, MAX233A) V- LOADED, NO LOAD ON V+ V+ LOADED, NO LOAD ON V- 1µF 1µF0.1µF 01 0 4 0 6 0 AVAILABLE OUTPUT CURRENT vs. DATA RATE MAX220-02 DATA RATE (kbits/sec) OUTPUT CURRENT (mA) 20 30 50 OUTPUT LOAD CURRENT FLOWS FROM V+ TO V- VCC = +5.25V ALL CAPS 1µF ALL CAPS 0.1µF VCC = +4.75V +10V -10V MAX222/MAX242 ON-TIME EXITING SHUTDOWN +5V +5V MAX220-03 500µs/div V+, V- VOLTAGE (V) 1µF CAPS V+ V-V- SHDN 0.1µF CAPS 1µF CAPS 0.1µF CAPS ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued) (VCC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, TA = TMIN to TMAX‚ unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS MAX222/MAX232A/MAX233/ MAX242/MAX243 0.5 1tPHLR MAX220 0.6 3 MAX222/MAX232A/MAX233/ MAX242/MAX243 0.6 1 Receiver Propagation Delay RS-232 to TLL (Normal Operation), Figure 2 tPLHR MAX220 0.8 3 µs tPHLS MAX242 0.5 10 Receiver Propagation Delay RS-232 to TLL (Shutdown), Figure 2 tPHLS MAX242 2.5 10 µs Receiver-Output Enable Time, Figure 3 t ER MAX242 125 500 ns Receiver-Output Disable Time, Figure 3 t DR MAX242 160 500 ns Transmitter-Output Enable Time (SHDN Goes High), Figure 4 tET MAX222/MAX242, 0.1µF caps (includes charge-pump start-up) 250 µs Transmitter-Output Disable Time (SHDN Goes Low), Figure 4 tDT MAX222/MAX242, 0.1µF caps 600 ns MAX222/MAX232A/MAX233/ MAX242/MAX243 300 Transmitter + to - Propagation Delay Difference (Normal Operation) tPHLT - tPLHT MAX220 2000 ns MAX222/MAX232A/MAX233/ MAX242/MAX243 100Receiver + to - Propagation Delay Difference (Normal Operation) tPHLR - tPLHR MAX220 225 ns

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Input Voltages T Output Voltages Continuous Power Dissipation (TA = +70°C) 24-Pin Narrow Plastic DIP 24-Pin Narrow CERDIP Operating Temperature Ranges ABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241 ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (MAX223/230/232/234/236/237/238/240/241, VCC = +5V ±10; MAX233/MAX235, V CC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239, VCC = 5V ±10%; V+ = 7.5V to 13.2V; TA = TMIN to TMAX; unless otherwise noted.) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. CONDITIONS MIN TYP MAX UNITS Output Voltage Swing All transmitter outputs loaded with 3kΩ to ground ±5.0 ±7.3 V VCC Power-Supply Current No load, TA = +25°C 51 0 mA71 5 0.4 1 V+ Power-Supply Current 1.8 5 mA51 5 Shutdown Supply Current TA = +25°C 15 50 VInput Logic Threshold High TIN 2.0 EN, SHDN (MAX223); EN, SHDN (MAX230/235/236/240/241) 2.4 Logic Pull-Up Current TIN =0 V 1.5 200 Receiver Input Voltage Operating Range -30 +30 V µA µA11 0 VInput Logic Threshold Low TIN; EN, SHDN (MAX233); EN, SHDN (MAX230/235–241) 0.8 MAX231/239 MAX223/230/234–238/240/241 MAX232/233 PARAMETER MAX239 MAX230/235/236/240/241 MAX231 MAX223 Note 4: Maximum reflow temperature for the MAX233/MAX235 is +225°C.

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers V 0.8 1.2 PARAMETER MIN TYP MAX UNITSCONDITIONS Normal operation SHDN = 5V (MAX223) SHDN = 0V (MAX235/236/240/241) 1.7 2.4 RS-232 Input Threshold Low TA = +25°C, VCC = 5V 0.6 1.5 VRS-232 Input Threshold High TA = +25°C, VCC = 5V Shutdown (MAX223) SHDN = 0V, EN = 5V (R4IN‚ R5IN) 1.5 2.4 ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued) (MAX223/230/232/234/236/237/238/240/241, VCC = +5V ±10; MAX233/MAX235, V CC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239, VCC = 5V ±10%; V+ = 7.5V to 13.2V; TA = TMIN to TMAX; unless otherwise noted.) Shutdown (MAX223) SHDN = 0V, EN = 5V (R4IN, R5IN) Normal operation SHDN = 5V (MAX223) SHDN = 0V (MAX235/236/240/241) RS-232 Input Hysteresis VCC = 5V, no hysteresis in shutdown 0.2 0.5 1.0 V RS-232 Input Resistance TA = +25°C, VCC = 5V 357 kΩ TTL/CMOS Output Voltage Low IOUT = 1.6mA (MAX231/232/233, IOUT = 3.2mA) 0.4 V TTL/CMOS Output Voltage High IOUT = -1mA 3.5 V CC - 0.4 V TTL/CMOS Output Leakage Current 0V ≤ ROUT ≤ VCC; EN = 0V (MAX223); EN = VCC (MAX235–241 ) 0.05 ±10 µA MAX223 600 nsReceiver Output Enable Time Normal operation MAX235/236/239/240/241 400 MAX223 900 nsReceiver Output Disable Time Normal operation MAX235/236/239/240/241 250 Normal operation 0.5 10 µsSHDN = 0V (MAX223) 44 0Propagation Delay RS-232 IN to TTL/CMOS OUT, C L = 150pF 64 0 3 5.1 30 V/µs MAX231/MAX232/MAX233, TA = +25°C, VCC = 5V, RL = 3kΩ to 7kΩ, CL = 50pF to 2500pF, measured from +3V to -3V or -3V to +3V 43 0 Transmitter Output Resistance VCC = V+ = V- = 0V, VOUT = ±2V 300 Ω Transmitter Output Short-Circuit Current ±10 mA tPHLS tPLHS Transition Region Slew Rate MAX223/MAX230/MAX234–241, TA = +25°C, VCC = 5V, RL = 3kΩ to 7kΩ‚ CL = 50pF to 2500pF, measured from +3V to -3V or -3V to +3V

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers 8.5 6.5 4.5 5.5 TRANSMITTER OUTPUT VOLTAGE (VOH) vs. VCC 7.0 8.0 MAX220-04 VCC (V) VOH (V) 5.0 7.5

1 TRANSMITTER

3 TRANS-

4 TRANSMITTERS

2 TRANSMITTERS

TA = +25°C C1–C4 = 1 µF TRANSMITTER LOADS = 3kΩ || 2500pF 7.4 6.0 0 2500 TRANSMITTER OUTPUT VOLTAGE (VOH) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES 6.4 6.2 7.2 7.0 MAX220-05 LOAD CAPACITANCE (pF) VOH (V) 15001000500 2000 6.8 6.6 160kbits/sec 80kbits/sec 20kbits/sec TA = +25°C VCC = +5V

3 TRANSMITTERS LOADED

R L = 3kΩ C1–C4 = 1 µF 12.0 4.0 0 2500 TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE 6.0 5.0 11.0 9.0 10.0 MAX220-06 LOAD CAPACITANCE (pF) SLEW RATE (V/µs) 15001000500 2000 8.0 7.0 TA = +25°C VCC = +5V LOADED, RL = 3kΩ C1–C4 = 1 µF

1 TRANSMITTER LOADED

3 TRANSMITTERS

-6.0 -9.0 4.5 5.5 TRANSMITTER OUTPUT VOLTAGE (VOL) vs. VCC -8.0 -8.5 -6.5 -7.0 MAX220-07 VCC (V) VOL (V) 5.0 -7.5

4 TRANS-

TA = +25°C C1–C4 = 1 µF TRANSMITTER LOADS = 3kΩ || 2500pF

1 TRANS-

2 TRANS-

-6.0 -7.6 02 5 0 0 TRANSMITTER OUTPUT VOLTAGE (VOL) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES -7.0 -7.2 -7.4 -6.2 -6.4 MAX220-08 LOAD CAPACITANCE (pF) VOL (V) 15001000500 2000 -6.6 -6.8 160kbits/sec 80kbits/sec 20Kkbits/sec TA = +25°C VCC = +5V R L = 3kΩ C1–C4 = 1 µF -10 0 5 10 15 20 25 30 35 40 45 50 TRANSMITTER OUTPUT VOLTAGE (V+, V-) vs. LOAD CURRENT MAX220-09 CURRENT (mA) V+, V- (V) V+ AND V- EQUALLY LOADED V- LOADED, NO LOAD ON V+ TA = +25°C VCC = +5V C1–C4 = 1 µF ALL TRANSMITTERS UNLOADED V+ LOADED, NO LOAD ON V- MAX223/MAX230–MAX241 *SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTS V+, V- WHEN EXITING SHUTDOWN (1µF CAPACITORS) MAX220-13 SHDN* O 500ms/div

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249 ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249 (MAX225, VCC = 5.0V ±5%; MAX244–MAX249, VCC = +5.0V ±10%, external capacitors C1–C4 = 1µF; TA = TMIN to TMAX; unless oth- erwise noted.) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Input Voltages TIN‚ ENA, ENB, ENR, ENT, ENRA, Short Circuit (one output at a time) Continuous Power Dissipation (TA = +70°C) 40-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ...611mW Operating Temperature Ranges VCC = 0V, VOUT = ±15V µATables 1a–1d ±0.01 ±25 Normal operation Shutdown Tables 1a–1d, normal operation All transmitter outputs loaded with 3kΩ to GND ENA, ENB, ENT, ENTA, ENTB = VCC, VOUT = ±15V VRS-232 Input Hysteresis RS-232 Input Threshold Low V V±5 ±7.5Output Voltage Swing Output Leakage Current (Shutdown) ±0.01 ±25 Ω300 10MVCC = V+ = V- = 0V, VOUT = ±2V (Note 7)Transmitter Output Resistance µA PARAMETER ±0.05 ±0.10 MIN TYP MAX UNITS Normal operation, outputs disabled, Tables 1a–1d, 0V ≤ VOUT ≤ VCC, ENR_ = VCC TTL/CMOS Output Leakage Current 10 30Shrinking VOUT = VCC mA-2 -10Sourcing VOUT = GND V3.5 V CC - 0.2IOUT = -1.0mATTL/CMOS Output Voltage High V0.2 0.4IOUT = 3.2mATTL/CMOS Output Voltage Low kΩ357 0.2 0.5 1.0VCC = 5V 1.4 0.8 V TTL/CMOS Output Short-Circuit Current V1.8 2.4 0.8 1.3VCC = 5V RS-232 Input Resistance V±25RS-232 Input Voltage Operating Range mA±7 ±30VOUT = 0VOutput Short-Circuit Current kbps120 64Data Rate CONDITIONS VCC = 5V µA±0.01 ±1Logic Pull-Up/lnput Current 10 50 Tables 1a–1d RS-232 Input Threshold High V2 1.4Input Logic Threshold High RS-232 TRANSMITTERS RS-232 RECEIVERS Note 5: Input voltage measured with transmitter output in a high-impedance state, shutdown, or VCC = 0V. Note 6: Maximum reflow temperature for the MAX225/MAX245/MAX246/MAX247 is +225°C.

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX225/MAX244–MAX249 012345 TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE MAX220-10 LOAD CAPACITANCE (nF) TRANSMITTER SLEW RATE (V/µs) VCC = 5V EXTERNAL POWER SUPPLY 1µF CAPACITORS 40kb/s DATA RATE

8 TRANSMITTERS

LOADED WITH 3kΩ -10 0 5 10 15 20 25 30 35 OUTPUT VOLTAGE vs. LOAD CURRENT FOR V+ AND V- MAX220-11 LOAD CURRENT (mA) OUTPUT VOLTAGE (V) V+ AND V- LOADED EITHER V+ OR V- LOADED V+ AND V- LOADED VCC = 5V EXTERNAL CHARGE PUMP 1µF CAPACITORS DRIVING 5kΩ AND 2000pF AT 20kbits/sec V- LOADED V+ LOADED 9.0 5.0 01 2 345 TRANSMITTER OUTPUT VOLTAGE (V+, V-) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES 6.0 5.5 8.5 MAX220-12 LOAD CAPACITANCE (nF) V+, V (V) 8.0 7.5 7.0 6.5 VCC = 5V WITH ALL TRANSMITTERS DRIVEN LOADED WITH 5kΩ 10kb/sec 20kb/sec 40kb/sec 60kb/sec 100kb/sec 200kb/sec ALL CAPACITIORS 1µF

Figure 1. Transmitter Propagation-Delay Timing Figure 2. Receiver Propagation-Delay Timing

1 OR 0 TX

Figure 3. Receiver-Output Enable and Disable Timing Figure 4. Transmitter-Output Disable Timing

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers ENT ENR OPERATION STATUS TRANSMITTERS RECEIVERS 0 0 Normal Operation All Active All Active 0 1 Normal Operation All Active All 3-State 1 0 Shutdown All 3-State All Low-Power Receive Mode 1 1 Shutdown All 3-State All 3-State Table 1a. MAX245 Control Pin Configurations ENT ENR OPERATION STATUS TRANSMITTERS RECEIVERS TA1–TA4 TB1–TB4 RA1–RA5 RB1–RB5 0 0 Normal Operation All Active All Active All Active All Active 0 1 Normal Operation All Active All Active RA1–RA4 3-State, RA5 Active RB1–RB4 3-State, RB5 Active 1 0 Shutdown All 3-State All 3-State All Low-Power Receive Mode All Low-Power Receive Mode 1 1 Shutdown All 3-State All 3-State RA1–RA4 3-State, RA5 Low-Power Receive Mode RB1–RB4 3-State, RB5 Low-Power Receive Mode Table 1b. MAX245 Control Pin Configurations Table 1c. MAX246 Control Pin Configurations ENA ENB OPERATION STATUS TRANSMITTERS RECEIVERS TA1–TA4 TB1–TB4 RA1–RA5 RB1–RB5 0 0 Normal Operation All Active All Active All Active All Active 0 1 Normal Operation All Active All 3-State All Active RB1–RB4 3-State, RB5 Active 1 0 Shutdown All 3-State All Active RA1–RA4 3-State, RA5 Active All Active 1 1 Shutdown All 3-State All 3-State RA1–RA4 3-State, RA5 Low-Power Receive Mode RB1–RB4 3-State, RA5 Low-Power Receive Mode

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TA1–TA4 TB1–TB4 RA1–RA4 RB1–RB4 0 0 0 0 Normal Operation All Active All Active All Active All Active 0 0 0 1 Normal Operation All Active All Active All Active All 3-State, except RB5 stays active on MAX247 0 0 1 0 Normal Operation All Active All Active All 3-State All Active 0 0 1 1 Normal Operation All Active All Active All 3-State All 3-State, except RB5 stays active on MAX247 0 1 0 0 Normal Operation All Active All 3-State All Active All Active 0 1 0 1 Normal Operation All Active All 3-State All Active All 3-State, except RB5 stays active on MAX247 0 1 1 0 Normal Operation All Active All 3-State All 3-State All Active 0 1 1 1 Normal Operation All Active All 3-State All 3-State All 3-State, except RB5 stays active on MAX247 1 0 0 0 Normal Operation All 3-State All Active All Active All Active 1 0 0 1 Normal Operation All 3-State All Active All Active All 3-State, except RB5 stays active on MAX247 1 0 1 0 Normal Operation All 3-State All Active All 3-State All Active 1 0 1 1 Normal Operation All 3-State All Active All 3-State All 3-State, except RB5 stays active on MAX247 1 1 0 0 Shutdown All 3-State All 3-State Low-Power Receive Mode Low-Power Receive Mode 1 1 0 1 Shutdown All 3-State All 3-State Low-Power Receive Mode All 3-State, except RB5 stays active on MAX247 1 1 1 0 Shutdown All 3-State All 3-State All 3-State Low-Power Receive Mode 1 1 1 1 Shutdown All 3-State All 3-State All 3-State All 3-State, except RB5 stays active on MAX247 Table 1d. MAX247/MAX248/MAX249 Control Pin Configurations MAX248 OPERATION STATUSENRB MAX247 TA1–TA4 TB1–TB4 RA1–RA4 RB1–RB5 TRANSMITTERS ENRAENTBENTA MAX249 TA1–TA3 TB1–TB3 RA1–RA5 RB1–RB5 RECEIVERS

-10V on C4 at the V- output. so the output voltage drops with increasing load current. sourcing current from V+ and V- to external circuitry. is internally connected to VCC in shutdown mode. mum driver output levels under worst-case conditions. put voltage ranges from (V+ -1.3V) to (V- +0.5V). Input thresholds are both TTL and CMOS compatible. outputs of unused drivers low because all drivers invert. supply current typically drops to 8µA in shutdown mode. state control on the receiver outputs. shutdown control line is high. 10V/µs loaded with 3Ω and 2500pF. level greater than 3V as a logic 0, so all receivers invert. Table 2. Three-State Control of Receivers

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers nominal 5k Ω values. The receivers implement Type 1 interpretation of the fault conditions of V.28 and EIA/TIA-232E. The receiver input hysteresis is typically 0.5V with a guaranteed minimum of 0.2V. This produces clear out- put transitions with slow-moving input signals, even with moderate amounts of noise and ringing. The receiver propagation delay is typically 600ns and is independent of input swing direction. Low-Power Receive Mode The low-power receive-mode feature of the MAX223, MAX242, and MAX245–MAX249 puts the IC into shut- down mode but still allows it to receive information. This is important for applications where systems are periodi- cally awakened to look for activity. Using low-power receive mode, the system can still receive a signal that will activate it on command and prepare it for communi- cation at faster data rates. This operation conserves system power. Negative Threshold—MAX243 The MAX243 is pin compatible with the MAX232A, differ- ing only in that RS-232 cable fault protection is removed on one of the two receiver inputs. This means that control lines such as CTS and RTS can either be driven or left floating without interrupting communication. Different cables are not needed to interface with different pieces of equipment. The input threshold of the receiver without cable fault protection is -0.8V rather than +1.4V. Its output goes positive only if the input is connected to a control line that is actively driven negative. If not driven, it defaults to the 0 or “OK to send” state. Normally‚ the MAX243’s other receiver (+1.4V threshold) is used for the data line (TD or RD)‚ while the negative threshold receiver is con- nected to the control line (DTR‚ DTS‚ CTS‚ RTS, etc.). Other members of the RS-232 family implement the optional cable fault protection as specified by EIA/TIA- 232E specifications. This means a receiver output goes high whenever its input is driven negative‚ left floating‚ or shorted to ground. The high output tells the serial communications IC to stop sending data. To avoid this‚ the control lines must either be driven or connected with jumpers to an appropriate positive voltage level. Shutdown—MAX222–MAX242 On the MAX222‚ MAX235‚ MAX236‚ MAX240‚ and MAX241‚ all receivers are disabled during shutdown. On the MAX223 and MAX242‚ two receivers continue to operate in a reduced power mode when the chip is in shutdown. Under these conditions‚ the propagation delay increases to about 2.5µs for a high-to-low input transition. When in shutdown, the receiver acts as a CMOS inverter with no hysteresis. The MAX223 and MAX242 also have a receiver output enable input ( EN for the MAX242 and EN for the MAX223) that allows receiver output control independent of SHDN (SHDN for MAX241). With all other devices‚ SHDN (SHDN for MAX241) also disables the receiver outputs. The MAX225 provides five transmitters and five receivers‚ while the MAX245 provides ten receivers and eight transmitters. Both devices have separate receiver and transmitter-enable controls. The charge pumps turn off and the devices shut down when a logic high is applied to the ENT input. In this state, the supply cur- rent drops to less than 25µA and the receivers continue to operate in a low-power receive mode. Driver outputs enter a high-impedance state (three-state mode). On the MAX225‚ all five receivers are controlled by the ENR input. On the MAX245‚ eight of the receiver out- puts are controlled by the ENR input‚ while the remain- ing two receivers (RA5 and RB5) are always active. RA1–RA4 and RB1–RB4 are put in a three-state mode when ENR is a logic high. Receiver and Transmitter Enable Control Inputs The MAX225 and MAX245–MAX249 feature transmitter and receiver enable controls. The receivers have three modes of operation: full-speed receive (normal active)‚ three-state (disabled)‚ and low- power receive (enabled receivers continue to function at lower data rates). The receiver enable inputs control the full-speed receive and three-state modes. The transmitters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). The transmitter enable inputs also control the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the low-power receive mode when in shutdown.

MAX220–MAX249 Tables 1a–1d define the control states. The MAX244 has no control pins and is not included in these tables. The MAX246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. A logic high at the A-side control input ( ENA) causes the four A-side receivers and drivers to go into a three-state mode. Similarly, the B-side control input (ENB) causes the four B-side drivers and receivers to go into a three-state mode. As in the MAX245, one A- side and one B-side receiver (RA5 and RB5) remain active at all times. The entire device is put into shut- down mode when both the A and B sides are disabled (ENA = ENB = +5V). The MAX247 provides nine receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs each control four drivers. The ninth receiver (RB5) is always active. The device enters shutdown mode with a logic high on both ENTA and ENTB. The MAX248 provides eight receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs control four drivers each. This part does not have an always-active receiver. The device enters shutdown mode and trans- mitters go into a three-state mode with a logic high on both ENTA and ENTB. The MAX249 provides ten receivers and six drivers with four control pins. The ENRA and ENRB receiver enable inputs each control five receiver outputs. The ENTA and ENTB transmitter enable inputs control three dri- vers each. There is no always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB. In shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kb/s. Figures 5 through 25 show pin configurations and typi- cal operating circuits. In applications that are sensitive to power-supply noise, V CC should be decoupled to ground with a capacitor of the same value as C1 and C2 connected as close as possible to the device. +5V-Powered, Multichannel RS-232 Drivers/Receivers

109 R2OUTR2IN

PIN NUMBERS IN TYPICAL OPERATING CIRCUIT ARE FOR DIP/SO PACKAGES ONLY. Figure 5. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit Figure 6. MAX222/MAX242 Pin Configurations and Typical Operating Circuit

PINS (ENR, GND, VCC, T5OUT) ARE INTERNALLY CONNECTED. CONNECT EITHER OR BOTH EXTERNALLY. T5OUT IS A SINGLE DRIVER.

5 RECEIVERS

5 TRANSMITTERS

2 CONTROL PINS

1 RECEIVER ENABLE (ENR)

1 TRANSMITTER ENABLE (ENT)

Figure 7. MAX225 Pin Configuration and Typical Operating Circuit

27 T1IN T1OUT

20 T3OUT 1T3IN

12 VCC

2821 T4IN T4OUT

Figure 8. MAX223/MAX241 Pin Configuration and Typical Operating Circuit

8 T1IN T1OUT

Figure 13. MAX235 Pin Configuration and Typical Operating Circuit

18 T3OUT 1T3IN

Figure 14. MAX236 Pin Configuration and Typical Operating Circuit

Figure 15. MAX237 Pin Configuration and Typical Operating Circuit

25 T1IN T1OUT

19 T3OUT 24T3IN

Figure 16. MAX238 Pin Configuration and Typical Operating Circuit

1924 T1IN T1OUT

16 T3OUT 13T3IN

6 VCC 8

Figure 17. MAX239 Pin Configuration and Typical Operating Circuit

715 T1IN T1OUT

37 T3OUT 6T3IN

25 VCC

538 T4IN T4OUT

Figure 18. MAX240 Pin Configuration and Typical Operating Circuit

Figure 19. MAX243 Pin Configuration and Typical Operating Circuit

10 R A1OUT

11 R A2OUT

12 R A3OUT

13 R A4OUT

10 RECEIVERS

5 A-SIDE RECEIVER

5 B-SIDE RECEIVER

4 A-SIDE TRANSMITTERS

4 B-SIDE TRANSMITTERS

Figure 20. MAX244 Pin Configuration and Typical Operating Circuit

11 R A1IN

12 R A2IN

13 R A3IN

14 R A4IN

15 R A5IN

5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE)

5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)

8 TRANSMITTTERS

Figure 21. MAX245 Pin Configuration and Typical Operating Circuit

40 V CC

Figure 22. MAX246 Pin Configuration and Typical Operating Circuit

12 R A1IN

13 R A2IN

14 R A3IN

15 R A4IN

40 VCC

9 RECEIVERS

4 A-SIDE RECEIVERS

4 CONTROL PINS

Figure 23. MAX247 Pin Configuration and Typical Operating Circuit

8 RECEIVERS

4 B-SIDE RECEIVERS

Figure 24. MAX248 Pin Configuration and Typical Operating Circuit

5 A-SIDE RECEIVERS

5 B-SIDE RECEIVERS

6 TRANSMITTERS

3 A-SIDE TRANSMITTERS

3 B-SIDE TRANSMITTERS

Figure 25. MAX249 Pin Configuration and Typical Operating Circuit

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers PART MAX222CPN 0°C to +70°C TEMP RANGE PIN-PACKAGE PART TEMP RANGE PIN-PACKAGE

18 Plastic DIP

MAX222CWN 0°C to +70°C 18 Wide SO MAX222C/D 0°C to +70°C Dice* MAX222EPN -40°C to +85°C 18 Plastic DIP MAX222EWN -40°C to +85°C 18 Wide SO MAX222EJN -40°C to +85°C 18 CERDIP MAX222MJN -55°C to +125°C 18 CERDIP MAX223CAI 0°C to +70°C 28 SSOP MAX223CWI 0°C to +70°C 28 Wide SO MAX223C/D 0°C to +70°C Dice* MAX223EAI -40°C to +85°C 28 SSOP MAX223EWI -40°C to +85°C 28 Wide SO MAX225CWI 0°C to +70°C 28 Wide SO MAX225EWI -40°C to +85°C 28 Wide SO MAX230CPP 0°C to +70°C 20 Plastic DIP MAX230CWP 0°C to +70°C 20 Wide SO MAX230C/D 0°C to +70°C Dice* MAX230EPP -40°C to +85°C 20 Plastic DIP MAX230EWP -40°C to +85°C 20 Wide SO MAX230EJP -40°C to +85°C 20 CERDIP MAX230MJP -55°C to +125°C 20 CERDIP MAX231CPD 0°C to +70°C 14 Plastic DIP MAX231CWE 0°C to +70°C 16 Wide SO MAX231CJD 0°C to +70°C 14 CERDIP MAX231C/D 0°C to +70°C Dice* MAX231EPD -40°C to +85°C 14 Plastic DIP MAX231EWE -40°C to +85°C 16 Wide SO MAX231EJD -40°C to +85°C 14 CERDIP MAX231MJD -55°C to +125°C 14 CERDIP MAX232CPE 0°C to +70°C 16 Plastic DIP MAX232CSE 0°C to +70°C 16 Narrow SO MAX232CWE 0°C to +70°C 16 Wide SO MAX232C/D 0°C to +70°C Dice* MAX232EPE -40°C to +85°C 16 Plastic DIP MAX232ESE -40°C to +85°C 16 Narrow SO MAX232EWE -40°C to +85°C 16 Wide SO MAX232EJE -40°C to +85°C 16 CERDIP MAX232MJE -55°C to +125°C 16 CERDIP MAX232MLP -55°C to +125°C 20 LCC MAX232ACPE 0°C to +70°C 16 Plastic DIP MAX232ACSE 0°C to +70°C 16 Narrow SO MAX232ACWE 0°C to +70°C 16 Wide SO MAX232AC/D MAX232AEPE -40°C to +85°C 16 Plastic DIP MAX232AESE 0°C to +70°C Dice* -40°C to +85°C 16 Narrow SO MAX232AEWE -40°C to +85°C 16 Wide SO MAX232AEJE -40°C to +85°C 16 CERDIP MAX232AMJE -55°C to +125°C 16 CERDIP MAX232AMLP -55°C to +125°C 20 LCC MAX233CPP 0°C to +70°C 20 Plastic DIP MAX233EPP -40°C to +85°C 20 Plastic DIP MAX233ACPP 0°C to +70°C 20 Plastic DIP MAX233ACWP 0°C to +70°C 20 Wide SO MAX233AEPP -40°C to +85°C 20 Plastic DIP MAX233AEWP -40°C to +85°C 20 Wide SO MAX234CPE 0°C to +70°C 16 Plastic DIP MAX234CWE 0°C to +70°C 16 Wide SO MAX234C/D 0°C to +70°C Dice* MAX234EPE -40°C to +85°C 16 Plastic DIP MAX234EWE -40°C to +85°C 16 Wide SO MAX234EJE -40°C to +85°C 16 CERDIP MAX234MJE -55°C to +125°C 16 CERDIP MAX235CPG 0°C to +70°C 24 Wide Plastic DIP MAX235EPG -40°C to +85°C 24 Wide Plastic DIP MAX235EDG -40°C to +85°C 24 Ceramic SB MAX235MDG -55°C to +125°C 24 Ceramic SB MAX236CNG 0°C to +70°C 24 Narrow Plastic DIP MAX236CWG 0°C to +70°C 24 Wide SO MAX236C/D 0°C to +70°C Dice* MAX236ENG -40°C to +85°C 24 Narrow Plastic DIP MAX236EWG -40°C to +85°C 24 Wide SO MAX236ERG -40°C to +85°C 24 Narrow CERDIP MAX236MRG -55°C to +125°C 24 Narrow CERDIP MAX237CNG 0°C to +70°C 24 Narrow Plastic DIP MAX237CWG 0°C to +70°C 24 Wide SO MAX237C/D 0°C to +70°C Dice* MAX237ENG -40°C to +85°C 24 Narrow Plastic DIP MAX237EWG -40°C to +85°C 24 Wide SO MAX237ERG -40°C to +85°C 24 Narrow CERDIP MAX237MRG -55°C to +125°C 24 Narrow CERDIP MAX238CNG 0°C to +70°C 24 Narrow Plastic DIP MAX238CWG 0°C to +70°C 24 Wide SO MAX238C/D 0°C to +70°C Dice* MAX238ENG -40°C to +85°C 24 Narrow Plastic DIP * Contact factory for dice specifications.

MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers * Contact factory for dice specifications.

18 CERDIP-55°C to +125°CMAX242MJN

18 CERDIP-40°C to +85°CMAX242EJN

18 Wide SO-40°C to +85°CMAX242EWN

18 Plastic DIP-40°C to +85°CMAX242EPN

Dice*0°C to +70°CMAX242C/D

18 Wide SO0°C to +70°CMAX242CWN

18 Plastic DIP0°C to +70°CMAX242CPN

20 SSOP0°C to +70°CMAX242CAP

28 Wide SO-40°C to +85°CMAX241EWI

28 SSOP-40°C to +85°CMAX241EAI

Dice*0°C to +70°CMAX241C/D

28 Wide SO0°C to +70°CMAX241CWI

28 SSOP0°C to +70°CMAX241CAI

Dice*0°C to +70°CMAX240C/D

44 Plastic FP0°C to +70°CMAX240CMH

24 Narrow CERDIP-55°C to +125°CMAX239MRG

24 Narrow CERDIP-40°C to +85°CMAX239ERG

24 Wide SO-40°C to +85°CMAX239EWG

24 Narrow Plastic DIP-40°C to +85°CMAX239ENG

Dice*0°C to +70°CMAX239C/D

24 Wide SO0°C to +70°CMAX239CWG

24 Narrow Plastic DIP0°C to +70°CMAX239CNG

24 Narrow CERDIP-55°C to +125°C

24 Wide SO

-40°C to +85°C MAX238MRG

24 Narrow CERDIP-40°C to +85°CMAX238ERG

PART PIN-PACKAGETEMP RANGEPART

44 PLCC-40°C to +85°CMAX249EQH

44 PLCC0°C to +70°CMAX249CQH

44 PLCC-40°C to +85°CMAX248EQH

Dice*0°C to +70°CMAX248C/D

44 PLCC0°C to +70°CMAX248CQH

40 Plastic DIP-40°C to +85°CMAX247EPL

Dice*0°C to +70°CMAX247C/D

40 Plastic DIP0°C to +70°CMAX247CPL

40 Plastic DIP-40°C to +85°CMAX246EPL

Dice*0°C to +70°CMAX246C/D

40 Plastic DIP0°C to +70°CMAX246CPL

40 Plastic DIP-40°C to +85°CMAX245EPL

Dice*0°C to +70°CMAX245C/D

40 Plastic DIP0°C to +70°CMAX245CPL

44 PLCC-40°C to +85°CMAX244EQH

Dice*0°C to +70°CMAX244C/D

44 PLCC0°C to +70°CMAX244CQH

16 CERDIP-55°C to +125°CMAX243MJE

16 CERDIP-40°C to +85°CMAX243EJE

16 Wide SO-40°C to +85°CMAX243EWE

16 Narrow SO-40°C to +85°CMAX243ESE

16 Plastic DIP-40°C to +85°CMAX243EPE

Dice*0°C to +70°CMAX243C/D

16 Wide SO0°C to +70°C

16 Plastic DIP0°C to +70°C

16 Narrow SO0°C to +70°CMAX243CSE

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circu it patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 36 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

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Revision History

Pages changed at Rev 15: 2–5, 8, 9, 36