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SP331 Dataheets PDF



Part Number SP331
Manufacturers Sipex
Logo Sipex
Description Programmable RS-232/RS-485 Transceiver
Datasheet SP331 DatasheetSP331 Datasheet (PDF)

® SP331 Programmable RS-232/RS-485 Transceiver s +5V Only Operation s Software Programmable RS-232 or RS-485 Selection s Four RS-232 Transceivers in RS-232 Mode s Two RS-485 Full-Duplex Transceivers in RS-485 Mode s Two RS-232 Transceivers and One RS-485 Transceiver in Dual Mode s Self-Testing Loopback Mode s Full Driver Tri-State (Hi-Z) Control s Ideal for RS-232 to RS-485 conversion DESCRIPTION… The SP331 is a programmable RS-232 and/or RS-485 transceiver IC. The SP331 contains four drivers.

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® SP331 Programmable RS-232/RS-485 Transceiver s +5V Only Operation s Software Programmable RS-232 or RS-485 Selection s Four RS-232 Transceivers in RS-232 Mode s Two RS-485 Full-Duplex Transceivers in RS-485 Mode s Two RS-232 Transceivers and One RS-485 Transceiver in Dual Mode s Self-Testing Loopback Mode s Full Driver Tri-State (Hi-Z) Control s Ideal for RS-232 to RS-485 conversion DESCRIPTION… The SP331 is a programmable RS-232 and/or RS-485 transceiver IC. The SP331 contains four drivers and four receivers when selected in RS-232 mode; and two drivers and two receivers when selected in RS-485 mode. The SP331 also contains a dual mode which has two RS-232 drivers/receivers plus one differential RS-485 driver/receiver. The RS-232 transceivers can typically operate at 230kbps while adhering to the RS-232 specifications. The RS-485 transceivers can operate up to 10Mbps while adhering to the RS-485 specifications. The SP331 includes a self-test loopback mode where the driver outputs are internally configured to the receiver inputs. This allows for easy diagnostic serial port testing without using an external loopback plug. The RS-232 and RS-485 drivers can be disabled (High-Z output) by controlling a set of four select pins. TI4 SEL_B TX4 TX3 VCC TX1 TX2 GND C1+ V+ (VDD) C2+ C1– C2– V– (VSS) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 TI3 TI2 TI1 SEL_C SEL_A SEL_D RX4 RX3 RX2 RX1 RI4 RI3 RI2 RI1 SP331 SP331DS/13 SP331 RS-232/RS-485 Serial Transceiver © Copyright 2000 Sipex Corporation 1 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. VCC...........................................................................+7V Storage Temperature..........................-65˚C to +150˚C Power Dissipation 28-pin Plastic DIP...........................1000mW 28-pin Plastic SOIC.......................1000mW Package Derating: 28-pin Plastic DIP øJA....................................................40 °C/W 28-pin Plastic SOIC øJA....................................................40 °C/W SPECIFICATIONS Typically 25°C @ Vcc = +5V unless otherwise noted. MIN. LOGIC INPUTS VIL VIH LOGIC OUTPUTS VOL VOH RS-232 DRIVER DC Characteristics HIGH Level Output LOW Level Output Open Circuit Voltage Short Circuit Current Power Off Impedance AC Characteristics Slew Rate Transition Time Maximum Data Rate Propagation Delay tPHL tPLH RS-232 RECEIVER DC Characteristics HIGH Threshold LOW Threshold Receiver Open Circuit Bias Input Impedance AC Characteristics Maximum Data Rate Propagation Delay tPHL tPLH RS-485 DRIVER DC Characteristics Open Circuit Voltage Differential Output 120 TYP. MAX. 0.8 UNITS Volts Volts Volts Volts CONDITIONS 2.0 0.4 2.4 IOUT= -3.2mA IOUT= 1.0mA RL=3kΩ, VIN=0.8V RL=3kΩ, VIN=2.0V VOUT = 0V Vcc = 0V, Vout = ±2.0V RL=3kΩ, CL= 50pF VCC = +5.0V, TA @ +25°C RL=3kΩ, CL=2500pF ; between ±3V, TA @ +25°C RL=3kΩ, CL=2500pF Measured from 1.5V of VIN to 50% of VOUT; RL=3kΩ +5.0 –15.0 –15 300 +15 –5.0 +15 ±100 Volts Volts Volts mA Ω V/µs µs kbps 30 1.5 235 2 2 8 8 µs µs 0.8 3 120 1.7 1.2 5 235 0.25 0.25 3.0 +2.0 7 Volts Volts Volts kΩ kbps VIN = +15V to –15V 1 1 µs µs Measured from 50% of VIN to 1.5V of VOUT. 1.5 6.0 5.0 Volts Volts RL=54Ω, CL=50pF SP331DS/13 SP331 RS-232/RS-485 Serial Transceiver © Copyright 2000 Sipex Corporation 2 SPECIFICATIONS Typically 25°C @ Vcc = +5V unless otherwise noted. MIN. RS-485 DRIVER Balance Common-Mode Output Output Current Short Circuit Current AC Characteristics Maximum Data Rate Output Transition Time Propagation Delay tPHL tPLH Driver Output Skew RS-485 RECEIVER DC Characteristics Inputs Common Mode Range Receiver Sensitivity Input Impedance AC Characteristics Maximum Data Rate Propagation Delay tPHL tPLH Differential Receiver Skew TYP. MAX. ±0.2 3.0 UNITS Volts Volts mA mA Mbps ns ns ns ns CONDITIONS |VT| - |VT| RL=54Ω Terminated in –7V to +10V RL=54Ω Rise/fall time, 10%–90% See Figures 2 & 4 RDIFF=54Ω, CL1=CL2=100pF RDIFF=54Ω, CL1=CL2=100pF per Figure 4, tSKEW = | tDPLH - tDPHL| 28.0 ±250 10 30 80 80 10 50 120 120 20 –7.0 12 10 ±0.2 15 +12.0 ±0.3 Volts Volts kΩ Mbps –7V ≤ VCM ≤ +12V –7V ≤ VCM ≤ +12V 130 130 10 200 200 20 ns ns ns See Figures 2 & 6 RDIFF=54Ω, CL1=CL2=100pF RDIFF=54Ω, CL1=CL2=100pF tSKEW = | tPLH – tPHL |; RDIFF=54Ω, CL1=CL2=100pF ENABLE TIMING RS-485 Driver Enable Time Enable to Low Enable to High Disable Time Disable From Low Disable From High 90 90 80 80 150 150 120 120 ns ns ns ns See Figures 3 & 5 CL=15pF, S1 Closed CL=15pF, S2 Closed See Figures 3 & 5 CL=15pF, S1 Closed CL=15pF, S2 Closed POWER REQUIREMENTS Supply Voltage VCC Supply Current ICC No Load (Tx Disabled) No Load (RS-232 Mode) No Load (RS-485 Mode) ENVIRO.


SP3249E SP331 SP332


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