4 Channel RS422 Serial Interface

  • Standard 3U 32 bit CompactPCI module
  • 4 channels with RS422 interfaces
  • onboard termination
  • High performance asynchronous serial interface (up to 5.5296 Mbps)
  • Hardware handshake and nearly full modem support available
  • 64 byte FIFO
  • Front panel I/O (DB-50 connector)

Product status: Active

Operating Temperature Range -40 °C to +85 °C RoHS compliant

The TCP468 is a standard 3U 32 bit CompactPCI module and offers 4 channels of high performance RS 422 serial interface.

The module is based on the Exar XR17D154 universal PCI UART.

The module offers front panel I/O with a DB-50 type connector. Each channel provides nearly full modem support by the following signals: RxD±, TxD±, RTS±, CTS±, DCD± and DTR±.

On-board termination is provided for all input signals.

Each channel has 64 byte transmit and receive FIFOs to significantly reduce the overhead required to provide data to and get data from the transmitters and receivers. The FIFO trigger levels are programmable and the baud rate is individually programmable up to 5.5296 Mbps. The UART offers readable FIFO levels.

All channels generate interrupts on PCI interrupt INTA. For fast interrupt source detection the UART provides a special Global Interrupt Source Register.

All serial channels use ESD protected transceivers. ESD protection is up to ±15KV.

The TCP468 can operate with 3.3V and 5.0V PCI I/O signaling voltage.

Software Support (TDRV002-SW-xx) for different operating systems is available.

Mechanical Interface Standard 3U 32 Bit CompactPCI module conforming to PICMG 2.0 R3.0
Electrical Interface PCI Rev. 2.3 compliant, 33 MHz / 32 bit PCI, 3.3V and 5V PCI Signaling Voltage
PCI Target Chip Exar XR17D154
Quad UART Exar XR17D154
Interface Type Asynchronous serial interface
Number of Channels 4
Physical Interface RS422
Serial Channel /O Signals RxD±, TxD±, RTS±, CTS± , DTR±, DCD± for each channel
Termination 120 ohms between + and – of each input,
680R pullup between + and 5V, 680R Pulldown between – and GND
Programmable Baud Rates up to 5.5296 Mbps
ESD Protection ±15kV – Human Body Model
FIFO 64 byte transmit FIFO, 64 byte receive FIFO per channel
I/O Interface DB-50 type Connector Harting 09665526616 or compatible
Power Requirements 80 mA typical @ +5V DC (no load)
Temperature Range Operating: -40 °C to +85 °C
Storage: -40 °C to +85 °C
MTBF 842 000 h
Humidity 5 – 95% non-condensing
Weight 140 g



4 Channel Serial RS422

4 RS422 serial interfaces with hardware handshake and nearly full modem support; baudrates up to 5.5296 Mbps; Front I/O via DB-50 connector


Front panel extension for 3U cPCI boards


Device Driver for Multiple Channel Serial Interface Family

Data Sheet

Data Sheet

Data Sheet - Issue 1.0.1

User Manual

User Manual - Issue 1.0.0