ST3222E STMICROELECTRONICS | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 10
Technical content
■ ESD PROTECTIO FOR RS-232 I/O PINS ±15KV HUMAN BODY MODEL ±8KV IEC 1000-4-2 CONTACT DISCHARGE ■ 300µA SUPPLY CURRENT ■ 250Kbps MINIMUM GUARENTEED DATA RATE ■ 6V/µs MINIMUM GUARANTEED SLEW RATE ■ MEET EIA/TIA-232 SPECIFICATIONS DOWN TO 3V ■ AVAILABLE IN SO-18, SSOP20 AND TSSOP20
DESCRIPTION
The ST3222E is a 3V powered EIA/TIA-232 and V.28/V.24 communications interface with low power requirements, high data-rate capabilities and enhanced electrostatic discharge (ESD) protection to ±8kV using IEC1000-4-2 Contact Discharge and ±15kV using the Human Body Model. ST3222E has a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 5V supplies with a dual charge pump. The charge pump requires only four small 0.1mF external capacitors for operation form 3V supply. The device has two receivers and two drivers. The ST3222E features a 1µA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers can remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1µA supply current. The device is guaranteed to run at data rates of 250Kbps while maintaining RS-232 output levels. Typical applications are Notebook, Subnotebook and Palmtop Computers, Battery Powered Equipment, Hand-Held Equipment, Peripherals and Printers. ORDERING CODES Type Temperature Range Package Comments ST3222ECD 0 to 70 °C SO-18 (Tube) 50parts per tube / 20tube per box ST3222EBD -40 to 85 °C SO-18 (Tube) 50parts per tube / 20tube per box ST3222ECDR 0 to 70 °C SO-18 (Tape & Reel) 1000 parts per reel ST3222EBDR -40 to 85 °C SO-18 (Tape & Reel) 1000 parts per reel ST3222ECPR 0 to 70 °C SSOP20 (Tape & Reel) 1350 parts per reel ST3222EBPR -40 to 85 °C SSOP20 (Tape & Reel) 1350 parts per reel ST3222ECTR 0 to 70 °C TSSOP20 (Tape & Reel) 2500 parts per reel ST3222EBTR -40 to 85 °C TSSOP20 (Tape & Reel) 2500 parts per reel ST3222E ±15KV ESD-PROTECTED, 3 TO 5.5V, LOW POWER, UP TO 250KBPS, RS-232 DRIVERS AND RECEIVERS SOP SSOP TSSOP
PlN N° (SO-18) PlN N° (SSOP20 TSSP20) SYMBOL NAME AND FUNCTION 11 E N Receiver Enable Control. Drive low for normal operation. Drive high to force the receivers outputs (R_OUT) into a high-impedance state.
22 C 1+ Positive Terminal for the first Charge Pump
3 3 V+ 5.5V Generated By The Charge Pump.
44 C 1- Negative Terminal for the first Charge Pump
55 C 2+ Positive Terminal for the second Charge Pump
66 C 2- Negative Terminal for the second Charge Pump
7 7 V- -5.5V Generated By The Charge Pump.
88 T2OUT Second Transmitter Output Voltage
99 R2 IN Second Receiver Input Voltage
10 10 R2 OUT Second Receiver Output Voltage
11 NC Not Connected
11 12 T2IN Second Transmitter Input Voltage 12 13 T1IN First Transmitter Input Voltage
14 NC Not Connected
13 15 R1 OUT First Receiver Output Voltage 14 16 R1 IN First Receiver Input Voltage 15 17 T1OUT First Transmitter Output Voltage 16 18 GND Ground 17 19 VCC Supply Voltage 18 20 SHDN Active Low Shutdown Control Input. Drive Low To Shut-down Transmittes And Charge Pump SO-18 SSOP20/TSSOP20
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. V+ and V- can have a maximum magnitude of +7V, but their absolute addition can not exceed 13 V. SHUTDOWN AND ENABLE CONTROL TRUTH TABLE ESD PERFORMANCE: TRANSMITTER OUTPUTS, RECEIVER INPUTS
ELECTRICAL CHARACTERISTICS
(C1 -C 4 =0 . 1µF, VCC =3 Vt o5 . 5 V ,TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA =2 5 ° C ) LOGIC INPUT ELECTRICAL CHARACTERISTICS (C1 -C 4 =0 . 1µF, VCC =3 Vt o5 . 5 V ,TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA =2 5 ° C ) Note 1: Transmitter input hysteresis is typically 250mV Symbol Parameter Value Unit VCC Supply Voltage -0.3 to 6 V V+ Doubled Voltage Terminal (V CC -0 . 3 )t o7 V V- Inverted Voltage Terminal 0.3 to -7 V V+ +|V-| 13 V TIN Transmitter Input Voltage Range -0.3 to 6 V SHDN Transmitter Input Voltage Range -0.3 to 6 V R IN Receiver Input Voltage Range ± 25 V TOUT Transmitter Output Voltage Range ± 13.2 V R OUT Receiver Output Voltage Range -0.3 to (V CC + 0.3) V tSHORT Transmitter Output Short to GND Time Continuous SHDN EN T-OUT R-OUT 0 0 High Z Active 0 1 High Z High Z 1 0 Active Active 1 1 Active High Z Symbol Parameter Test Conditions Min. Typ. Max. Unit ESD ESD Protection Voltage Human Body Model ±15 kV ESD ESD Protection Voltage IEC-1000-4-2 ±8k V Symbol Parameter Test Conditions Min. Typ. Max. Unit I SUPPLY VCC Power Supply Current No Load SHDN =V CC TA = 25°C 0.3 1 mA ISHDN SHUTDOWN Supply Current No Load SHDN =V CC TA = 25°C 1 10 µA Symbol Parameter Test Conditions Min. Typ. Max. Unit VIL Input Logic Threshold Low T-IN, EN, SHDN (Note 1) 0.8 V VIH Input Logic Threshold High VCC = 3.3V 2 V VCC =5 V 2 . 4 VHYS Transmitter Input Histeresys 0.25 V IIL Input Leakage Current T-IN, EN , SHDN ± 0.01 ± 1 µA
TRANSMITTER ELECTRICAL CHARACTERISTICS (C1 -C 4 =0 . 1µFV CC =3 Vt o5 . 5 V ,TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA =2 5 ° C ) RECEIVER ELECTRICAL CHARACTERISTICS (C1 -C 4 =0 . 1µFV CC =3 Vt o5 . 5 V ,TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA =2 5 ° C ) TIMING CHARACTERISTICS (C1 -C 4 =0 . 1µF, VCC =3 Vt o5 . 5 V ,TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA =2 5 ° C ) (Note 1) Transmitter Skew is measured at the transmitter zero cross points Symbol Parameter Test Conditions Min. Typ. Max. Unit VTOUT Output Voltage Swing All Transmitter outputs are loaded with 3KΩ to GND ± 5 ± 5.4 V RTOUT Transmitter Output Resistance VCC =V +=V -=0 V V OUT = ± 2V 300 10M Ω ITSC Output Short Circuit Current ± 60 mA ITOL Output Leakage Current V CC = 0V or 3V to 3.6V VOUT = ± 12V Transmitters Disable ± 25 µA Symbol Parameter Test Conditions Min. Typ. Max. Unit IOL Output Leakage Current R-OUT, EN =V CC , Receiver Disabled ± 0.05 ± 10 µA VRIN Receiver Input Voltage Operating Range -25 25 V VRIL Input Threshold Low T A = 25°C V CC = 3.3V 0.6 1.2 V TA = 25°C V CC = 5V 0.8 1.5 VRIH Input Threshold High T A = 25°C V CC = 3.3V 1.5 2.4 V TA = 25°C V CC = 5V 1.8 2.4 VRIHYS Input Hysteresis 0.5 V R RIN Input Resistance T A = 25°C 3 5 7 K Ω VROL Output Voltage Low I OUT = 1.6mA 0.4 V V ROH Output Voltage High I OUT = -1mA V CC -0.6 VCC -0.1 V Symbol Parameter Test Conditions Min. Typ. Max. Unit D R Data Transfer Rate R L =3 KΩ C L2= 1000pF one trasmitter switching
250 Kbps
Propagation Delay Input to Output R XIN to RXOUT C L = 150pF 0.15 µs |tPHLT -tTHL | Transmitter Propagation Delay Difference (Note 1) 200 ns tOER Receiver Output Enable Time Normal Operation 50 ns tODR Receiver Output Disable Time Normal Operation 50 ns |tPHLR -tTHR | Receiver Propagation Delay Difference 50 ns SRT Trnasition Slew Rate T A = 25°C R L =3 KΩ to 7KΩ VCC = 3.3V measured from +3V to -3V or -3V to +3V C L = 150pF to 1000pF C L = 150pF to 2500pF V/µs V/µs
CAPACITANCE VALUE ( µF) VCC C1 C2 C3 C4 Cbypass
DIM. mm. inch A 2.35 2.65 0.092 0.104 A1 0.1 0.3 0.004 0.012 A2 2.55 0.100 B 0.33 0.51 0.013 0.020 C 0.23 0.32 0.009 0.012 D 11.35 11.75 0.447 0.462 E 7.4 7.6 0.291 0.299 e 1.27 0.050 H 10.00 10.65 0.393 0.419 h 0.25 0.75 0.010 0.029 k8 ˚ ( m a x . ) L 0.4 1.27 0.016 0.050 SO-18 MECHANICAL DATA 0070768 Be A2 A 1018 D L H A1 C E K h x 45û SO18 Seating Plane 0.10mm .004
DIM. mm. inch A 2 0.079 A1 0.05 0.002 b 0.22 0.38 0.009 0.015 c 0.09 0.25 0.004 0.010 e 0.65 BSC 0.0256 BSC SSOP20 MECHANICAL DATA c Eb A2A D PIN 1 IDENTIFICATION A1 LKe 0061436C
DIM. mm. inch A 1.2 0.047 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0079 e 0.65 BSC 0.0256 BSC K0 ˚ 8 ˚0 ˚ 8 ˚ TSSOP20 MECHANICAL DATA c Eb A2A D PIN 1 IDENTIFICATION A1 LKe 0087225C
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. © The ST logo is a registered trademark of STMicroelectronics © 2003 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. © http://www.st.com