8 Channel RS232/RS422 Serial Interface

  • Standard single-width 32 bit PMC module
  • 8 channels RS232 and/or RS422 interfaces
  • High performance asynchronous serial interface (up to 5.5296 Mbps)
  • Hardware handshake and full modem support available
  • 64 byte FIFO
  • Front panel I/O (HD50 SCSI-2 type connector) and P14 I/O

Product status: Active

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

The TPMC461 is a standard single-width 32 bit PMC module and offers 8 channels of high performance asynchronous serial interface.

Three different standard modules are available: The TPMC461-10R provides 8 RS232 interfaces. The TPMC461-11R provides 8 RS422 interfaces. The TPMC461-12R provides 4 RS232 and 4 RS422 interfaces.

Other configurations are available as factory build option on a per channel base.

All modules offer front panel I/O with a HD50 SCSI-2 type connector and P14 I/O. Each RS232 channel supports RxD, TxD, RTS, CTS and GND. Each RS422 channel supports RxD+/-, TxD+/- and GND. Two channels of the TPMC461-10R/-12R offer full modem support (TxD, RxD, CTS, RTS, DSR, DTR, CD, RI and GND) for RS232. Two channels of the TPMC461-11R support RxD+/-, TxD+/-, RTS+/-, CTS+/- and GND for RS422.

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 921.6 kbps for RS232 channels and 5.5296 Mbps for RS422 channels. 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 TPMC461 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 PCI Mezzanine Card (PMC) Interface, Single Size
Electrical Interface PCI Rev. 2.3 compliant, 33 MHz / 32 bit PCI, 3.3V and 5V PCI Signaling Voltage
PCI Target Chip Exar XR17D158
Octal UART Exar XR17D158
Transceiver RS232: MAX3225E (or equivalent)
RS232 Full Modem: MAX3245E (or equivalent)
RS422: MAX3087E (or equivalent)
Interface Type Asynchronous serial interface
Number of Channels 8
Physical Interface TPMC461-10R: 8 RS232 (2 x with Full Modem)
TPMC461-11R: 8 RS422 (2 x with RTS & CTS)
TPMC461-12R: 4 RS232 (2 x with Full Modem), 4 RS422
Serial Channel I/O Signals RS232: TxD, RxD, RTS, CTS, GND
RS232 Full Modem: TxD, RxD, RTS, CTS, DTR, DSR, CD, RI, GND
RS422: TxD± , RxD±, GND (TPMC461-11R: RTS±, CTS±)
Termination RS422: 120 ohms between RxD+ and RxD- of each channel (TPMC461-11R: also between CTS+, CTS-)
Programmable Baud Rates RS232: up to 921.6 kbps
RS422: up to 5.5296 Mbps
ESD Protection RS232: ±15kV- Human Body Model, ±8kV- IEC 1000-4-2, Contact Discharge, ±15kV- IEC 1000-4-2, Air-Gap Discharge
RS422: ±15kV- Human Body Model
FIFO 64 byte transmit FIFO, 64 byte receive FIFO per channel
I/O Interface HD50 SCSI-2 type female connector (e.g. AMP#787395-5)
64 pin Mezzanine P14 I/O
Power Requirements 1) 50 mA to 70 mA typical @ +5V DC (no load)
Temperature Range Operating: -40°C to +85°C
Storage: -55°C to +125°C
MTBF 1) 570 000 h to 730 000 h
Humidity 5 – 95% non-condensing
Weight 67 g


1) depends on variant, for further details see User Manual



8 Channel Serial RS232

8 RS232 serial interface with hardware handshake; 2 channels with full modem support; baudrates up to 921.6 kbps; Front I/O via HD50 / SCSI-2 connector; Rear I/O


8 Channel Serial RS422

8 RS422 serial interface; 2 channels with hardware handshake; baudrates up to 5.5296 Mbps; Front I/O via HD50 / SCSI-2 connector; Rear I/O


4 Channel Serial RS232, 4 Channel Serial RS422

4 RS232 serial interface with hardware handshake; 2 channels with full modem support; baudrates up to 921.6 kbps; 4 RS422 serial interface; baudrates up to 5.5296 Mbps; Front I/O via HD50 / SCSI-2 connector; Rear I/O


HD50 / SCSI-2 Cable

HD50 / SCSI-2 Terminal Block

Cable Kit for Modules with HD50 / SCSI-2 Connector

PIM I/O Module with 50 pin Connector


Device Driver for Multiple Channel Serial Interface Family

Data Sheet

Data Sheet

Data Sheet - Issue 1.0.1

User Manual

User Manual - Issue 1.0.6