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Delphi Serial Transmitter/Receiver IC

The Delphi Serial Transmitter/Receiver IC (SXR) has been designed for minimal impact on the system and for RF suppression. It allows continued communication within a system that has a number of powered down units on line. The SXR was designed to communicate with up to 1.0 volt of ground difference between assemblies. The SXR acts as a buffer between a microprocessor's serial data port and a serial data bus by shaping the waveform for both transmitting and receiving operations.

Features

  • Available in 28-pin PLCC or 16-pin DIP
  • 1-volt ground difference tolerance in single-ended operation
  • 6-volt ground difference tolerance in differential operation
  • Tri-state output
  • Receiver filtering
  • Reduced Radio Frequency Interference (RFI)
  • No Hardware Master
  • Up to 10 SXRs on a common bus
  • Allows communication on the bus when a number of assemblies are powered down
  • Output short to battery protection

 

Packaging

  • 16-pin DIP
  • 28-pin PLCC

Typical Applications

  • Serial Data Communications (8192 baud, NRZ)
  • Primarily Automotive

 

Recommended Operating Conditions
Characteristic                                                       SymbolValue        Unit
Supply VoltageVcc4.75 to 5.5V
Input VoltageVin0 to VccV
Serial Data SpeedBPS8192Baud
Operating Temperature Range, Ambient (PLCC)Ta-40 to 125°C
Operating Temperature Range (DIP)Ta-40 to 110°C

Absolute Maximum Ratings
Characteristic                         SymbolValue        Unit
Supply VoltageVcc7V
Input VoltageVin-1 to 7V
Voltage at the Output Bus -1 to 16V
Storage TemperatureTstg-65 to 150°C
Maximum Junction TemperatureTj+150°C

Electrical Performance Characteristics
Characteristics Symbol Condition Min Max Unit
Input Voltage Low
TXIN, TE, DE 		Vilt

0.8 V
Input Voltage High
TXIN, TE, DE 		Viht
2.0
V
Output Voltage Low TXOUT Volt


0.152*Vcc V
Output Voltage High TXOUT Voht
0.865*Vcc
V
Input Current lit
Vin=0 to 2.4V TXIN-75 -300 µA
Vin=0.4 to 4V TE15 50 µA
Vin=0.4 to 4V DE ±20 µA
Tristate Leakage CurrentlotsTE=DE=GND, TXOUT=-1V to 16V-360 180 µA
Fault Condition
Output Current		lofcTE=DE=Vcc=TXIN=GND,
TXOUT=-16V to 16V		-120 180 µA
Output Current TXOUT
lot
TE=Vcc, DE=GND Transmitting "0",
Vout=0.2*Vcc		6.5
mA
TE=Vcc, DE=GND Transmitting "1",
Vout=0.8*Vcc		-6.5
mA
Input ThresholdVtV(RXIN*)=2.35V, Vcc=5.0V2.25 2.45 V
Input Current RXIN,
RXIN*		lir1-1V < Vin < 16 V-40130 µA
Input Current Offset
RXIN, RXIN*		lioVin=0V to 4V-10 10 µA
RXOUT Output
Voltage Low		Vollol=400µA
0.4 V
RXOUT Output
Voltage High		Vollol=-15µA
0.8*Vcc V
Supply CurrentLccTE=DE=0V, TXIN=Vcc 25 mA
TE=Vcc, DE=0V, TXIN=4096Hz,
50% duty cycle sq wave
63 mA
Short Circuit
Supply Current		lccsDE=0V, TXIN=4V, TE=4V,
V(TXOUT)=-1V
120 mA
DE=0V, TXIN=0V, TE=4V,
V(TXOUT)=16V
75 mA
Output Rise/Fall Time  12.5 17 µS
Enable/Disable Times   25 µS
Harmonic Content
of Output Signal		Vhct
530kHZ< f < 1670kHz,
f(TXIN)=4096Hz 50% duty cycle		 80 µV
Receiver Pulse
Width Distortion		tpwdr -6 1 µS

 

 

 

Delphi Serial Transmitter/Receiver IC (52k)