SP485EN/TR

SP481_04 SIPEX | Alldatasheet

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Technical content

Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation SP481/SP483/SP485 Low Power Half-Duplex RS-485 Transceivers

FEATURES

■ +5V Only ■ Low Power BiCMOS ■ Driver/Receiver Enable ■ Slew Rate Limited Driver for Low EMI (SP483) ■ Low Power Shutdown Mode (SP481 and SP483) ■ RS-485 and RS-422 Drivers/Receivers Vcc B A GNDD RRO RE DE DI SP481, SP483, and SP485 RE The SP481, SP483, and the SP485 are a family of half-duplex transceivers that meet the requirements of RS-485 and RS-422. Their BiCMOS design allows low power operation without sacrificing performance. The SP481 and SP485 meet the requirements of RS-485 and RS-422 up to 5Mbps. Additionally, the SP481 is equipped with a low power Shutdown mode. The SP483 is internally slew rate limited to reduce EMI and can meet the requirements of RS-485 and RS-422 up to 250kbps. The SP483 is also equipped with a low power Shutdown mode.

DESCRIPTION

SP481, SP483, SP485 Pinout (Top View) RO 1 RE 2 DE 3 DI 4

8 VCC

5 GND

D R SP485 Top View

Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Input Voltages Output Voltages

ELECTRICAL CHARACTERISTICS

TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP481/SP483/SP485 DRIVER DC Characteristics Differential Output Voltage GND VCC Volts Unloaded; R = ∞ ; see figure 1 Differential Output Voltage 2 VCC Volts with load; R = 50Ω; (RS422); see figure 1 Differential Output Voltage 1.5 V CC Volts with load; R = 27 Ω; (RS485); see figure 1 Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27Ω or R = 50Ω; see figure 1 Driver Common-Mode Output Voltage 3 Volts R = 27Ω or R = 50Ω; see figure 1 Input High Voltage 2.0 Volts Applies to DE, DI, RE Input Low Voltage 0.8 Volts Applies to DE, DI, RE Input Current ±10 µA Applies to DE, DI, RE Driver Short-Circuit Current VOUT = HIGH 35 250 mA -7V ≤ VO ≤ +12V VOUT = LOW 35 250 mA -7V ≤ VO ≤ +12V SP481/SP485 DRIVER AC Characteristics Maximum Data Rate Mbps RE = 5V, DE = 5V Driver Input to Output 30 60 ns tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 Driver Input to Output 30 60 ns tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 Driver Skew 5 10 ns see figures 3 and 6, tSKEW = | tDPLH - tDPHL | Driver Rise or Fall Time 15 40 ns From 10% to 90%; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 Driver Enable to Output High 40 70 ns CL = 100pF; see figures 4 & 7; S2 closed Driver Enable to Output Low 40 70 ns CL = 100pF; see figures 4 & 7; S1 closed Driver Disable Time from Low 40 70 ns CL = 15pF; see figures 2 & 9; S1 closed Driver Disable Time from High 40 70 ns CL = 15pF; see figures 2 & 9; S2 closed SP481/SP483/SP485 RECEIVER DC Characteristics Differential Input Threshold +0.2 Volts -7V ≤ VCM ≤ +12V Input Hysteresis 10 mV VCM = 0V Output Voltage High 2.4 Volts IO = -4mA,VID = +200mV Output Voltage Low 0.4 Volts IO = +4mA,VID = -200mV Three-State (High Impedance) Output Current ±1 µA 0.4V ≤ VO ≤ 2.4V; RE = 5V Input Resistance 15 kΩ -7V ≤ VCM ≤ +12V Input Current (A, B); VIN = 12V +1.0 mA DE = 0V, VCC = 0V or 5.25V, VIN = 12V Input Current (A, B); VIN = -7V -0.8 mA DE = 0V, VCC = 0V or 5.25V, VIN = -7V Short-Circuit Current 95 mA 0V ≤ VCM ≤ VCC 0.0

Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation MECHANICAL Operating Temperature Commercial (_C_) 0 +70 °C Industrial (_E_) -40 +85 °C Storage Temperature -65 +150 °C Package Plastic DIP (_S) NSOIC (_N) TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP481/SP485 RECEIVER AC Characteristics Maximum Data Rate 5 Mbps RE = 0V, DE = 0V Receiver Input to Output 60 90 200 ns tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 Receiver Input to Output 60 90 200 ns tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 Diff. Receiver Skew ItPLH-tPHLI 13 ns RDIFF = 54Ω; CL1 = CL2 = 100pF; Figures 3 & 8 Receiver Enable to Output Low 20 50 ns CRL = 15pF; Figures 2 & 9;S1 closed Receiver Enable to Output High 20 50 ns CRL = 15pF;Figures 2 & 9;S2 closed Receiver Disable from Low 20 50 ns CRL = 15pF; Figures 2 & 9;S1 closed Receiver Disable from High 20 50 ns CRL = 15pF; Figures 2 & 9;S2 closed SP481 Shutdown Timing Time to Shutdown 50 200 600 ns RE = 5V, DE = 0V Driver Enable from Shutdown to Output High 40 100 ns CL = 100pF; See figures 4 & 7; S2 closed Driver Enable from Shutdown to Output Low 40 100 ns CL = 100pF; See figures 4 & 7; S1 closed Receiver Enable from Shutdown to Output High 300 1000 ns CL = 15pF; See figures 2 & 9; S2 closed Receiver Enable from Shutdown to Output Low 300 1000 ns CL = 15pF; See figures 2 & 9; S1 closed POWER REQUIREMENTS Supply Voltage +4.75 +5.25 Volts Supply Current SP481/485 No Load 900 µA RE, DI = 0V or VCC; DE = VCC µA RE = 0V, DI = 0V or 5V; DE = 0V SP483 No Load 600 µA RE, DI = 0V or VCC; DE = VCC µA RE=0V, DI = 0V or 5V; DE = 0V SP481/SP483 Shutdown Mode 10 µA DE = 0V, RE=VCC ENVIRONMENTAL AND

Rev. 07/16/02 SP481/483/485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation PIN FUNCTION Pin# Name Description 1 RO Receiver Output.

2 RE Receiver Output Enable

Active LOW.

3 DE Driver Output Enable

Active HIGH. 4 DI Driver Input. 5 GND Ground Connection.

6 A Driver Output/Receiver Input

Non-inverting.

7 B Driver Output/Receiver Input

Inverting. 8 Vcc Positive Supply 4.75V<Vcc< 5.25V. SP481, SP483, SP485 Pinout (Top View) RO 1 RE 2 DE 3 DI 4 D R SP485 Top View SP483 AC SPECIFICATIONS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP483 DRIVER AC Characteristics Maximum Data Rate 250 kbps Driver Input to Output 250 800 2000 ns t PLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 & 6 Driver Skew 250 800 2000 ns t PHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 & 6 Driver Rise and Fall Time 100 800 ns see figures 3 & 6, tSKEW = |tDPLH - tDPHL| 250 2000 ns From 10% to 90%; R DIFF = 54Ω, CL1 = CL2 = 100pF, see figures 3 & 6 Driver Enable to Output High 250 2000 ns C L = 100pF; See figures 4 & 7; S2 closed Driver Enable to Output Low 250 2000 ns C L = 100pF; See figures 4 & 7; S1 closed Driver Disable Time from Low 300 3000 ns C L = 15pF; See figures 4 & 7; S1 closed Driver Disable Time from High 300 3000 ns C L = 15pF; See figures 4 & 7; S2 closed SP483 RECEIVER AC Characteristics Maximum Data Rate 250 kbps Receiver Input to Output 250 2000 ns t PLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 Diff. Receiver Skew ItPLH-tPHLI 100 ns R DIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 Receiver Enable to Output Low 20 50 ns CRL = 15pF; Figures 2 & 9; S1 closed Receiver Enable to Output High 20 50 ns CRL = 15pF; Figures 2 & 9; S2 closed Receiver Disable from Low 20 50 ns CRL = 15pF; Figures 2 & 9; S1 closed Receiver Disable from High 20 50 ns CRL = 15pF; Figures 2 & 9; S2 closed SP483 Shutdown Timing Time to Shutdown 50 200 600 ns RE = 5V, DE = 0V Driver Enable from Shutdown to Output High 2000 ns C L = 100pF; See figures 4 & 7; S2 closed Driver Enable from Shutdown to Output Low 2000 ns C L = 100pF; See figures 4 & 7; S1 closed Receiver Enable from Shutdown to Output High 2500 ns C L = 15pF; See figures 4 & 7; S2 closed Receiver Enable from Shutdown to Output Low 2500 ns C L = 15pF; See figures 4 & 7; S1 closed

Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation Receivers SP481, SP483, SP485 The SP481, SP483, and SP485 receivers have differential inputs with an input sensitivity as low as ±200mV. Input impedance of the receiv- ers is typically 15kΩ (12kΩ minimum). A wide common mode range of -7V to +12V allows for large ground potential differences between systems. The receivers of the SP481, SP483 and SP485 have a tri-state enable control pin. A logic LOW on RE (pin 4) will enable the receiver, a logic HIGH on RE (pin 4) will disable the receiver. The receiver for the SP481 and SP485 will operate up to at least 5Mbps. The SP483 receiver is rated for data rates up to 250kbps. The receiver for each of the three devices is equipped with the fail-safe feature. Fail-safe guarantees that the receiver output will be in a HIGH state when the input is left unconnected and floating. Shutdown Mode SP481/SP483 The SP481 and SP483 are equipped with a Shutdown mode. To enable the Shutdown state, both the driver and receiver must be disabled simultaneously. A logic LOW on DE (pin 5) and a logic HIGH on RE (pin 4) will put the SP481 or SP483 into Shutdown mode. In Shutdown, supply current will drop to typically 1µA. SP481, SP483, SP485 The SP481, SP483, and SP485 are half-duplex differential transceivers that meet the require - ments of RS-485 and RS-422. Fabricated with a Sipex proprietary BiCMOS process, all three products require a fraction of the power of older bipolar designs. The RS-485 standard is ideal for multi-drop applications and for long-distance interfaces. RS-485 allows up to 32 drivers and 32 receivers to be connected to a data bus, making it an ideal choice for multi-drop applications. Since the cabling can be as long as 4,000 feet, RS-485 transceivers are equipped with a wide (-7V to +12V) common mode range to accommodate ground potential differences. Because RS-485 is a differential interface, data is virtually immune to noise in the transmission line. Drivers SP481, SP483, SP485 The driver outputs of the SP481, SP483, and SP485 are differential outputs meeting the RS- 485 and RS-422 standards. The typical voltage output swing with no load will be 0 volts to +5 volts. With worst case loading of 54Ω across the differential outputs, the drivers can maintain greater than 1.5V voltage levels. The drivers of the SP481, SP483 and SP485 have an enable control line which is active HIGH. A logic HIGH on DE (pin 5) will enable the differential driver outputs. A logic LOW on DE (pin 5) will tri-state the driver outputs. The transmitters of the SP481 and SP485 will operate up to at least 5Mbps. The SP483 has internally slew rate limited driver outputs to minimize EMI. The maximum data rate for the SP483 driver is 250kbps.

Figure 6. Driver Propagation Delays Figure 1. Driver DC Test Load Circuit Figure 2. Receiver Timing Test Load Circuit Figure 3. Driver/Receiver Timing Test Circuit Figure 4. Driver Timing Test Load #2 Circuit

500 Output

Table 1. Transmit Function Truth Table Table 2. Receive Function Truth Table

Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation A A1 A2 SIDE VIEW Seating Plane SECTION B-B WITH PLATING SYMBOL MIN NOM MAX A 1.35 - 1.75 A1 0.1 - 0.25 A2 1.25 - 1.65 b 0.31 - 0.51 c 0.17 - 0.24 D E e L 0.4 - 1.27 ø 0º - 8º ø1 5º - 15º Note: Dimensions in (mm)

8 Pin NSOIC JEDEC MO-012 (AA) Variation

4.90 BSC

6.00 BSC

3.90 BSC

1.27 BSC

1.04 REF

0.25 BSC

L Ø Ø1 Ø Seating Plane VIEW C TOP VIEW b SEE VIEW C B B E E/2 INDEX AREA (D/2 X E1/2) E1/2 D e c BASE METAL b PACKAGE: 8 PIN NSOIC

Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation PACKAGE: 8 PIN PDIP INDEX AREA b N 1 2 3 N/2 c eA eB E SYMBOL MIN NOM MAX A - - 0.21 A1 0.15 - - A2 0.115 0.13 0.195 b 0.014 0.018 0.022 b2 0.045 0.06 0.07 b3 0.3 0.039 0.045 c 0.008 0.01 0.014 D 0.355 0.365 0.4 D1 0.005 - - E 0.3 0.31 0.325 E1 0.24 0.25 0.28 e eA eB - - 0.43 L 0.115 0.13 0.15 Note: Dimensions in (mm) .100 BSC .300 BSC

8 PIN PDIP JEDEC MS-001 (BA) Variation

D A L b e c

Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 Sipex Co r poration

ORDERING INFORMATION

Model Temperature Range Package Corporation ANALOG EXCELLENCE Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liabil ity arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rig hts nor the rights of others. Sipex Corporation Headquarters and Sales Office

233 South Hillview Drive

Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 e-mail: sales@sipex.com For lead-free packages, improved ESD protection and performance: upgrade to SP485E, SP481E, SP483E Example: SP485EN/TR = upgrade to SP485EEN-L/TR /TR = Tape and Reel Pack quantity is 2,500 for NSOIC. CLICK HERE TO ORDER SAMPLES