4 Channel RS232/RS422 Serial Interface (RJ45)

  • Standard XMC module
  • 4 channels RS232 and/or RS422 interfaces
  • High performance asynchronous serial interface (up to 15.625 Mbps)
  • Hardware handshake and full modem support available
  • 256 byte FIFO
  • Front panel (4 RJ45 connectors)

Product status: Active

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

The TXMC463 is a standard Switched Mezzanine Card (XMC) compatible module offering 4 channels of high performance asynchronous serial interface.

All modules offer front panel I/O with four RJ45 connectors. Four different standard modules are available: The TXMC463-10R and -15R provide 4 RS232 interfaces. The TXMC463-11R provides 4 RS422 interfaces. The TXMC463-12R provides 2 RS232 and 2 RS422 interfaces. The TXMC463-15R uses a non-standard RJ45 I/O pinout (as used on Motorola CPU boards).

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

Each RS232 channel supports TxD, RxD, CTS, RTS, DTR, CD, DSR/RI and GND. Each RS422 channel supports RxD+/-, TxD+/- and GND.

Each channel has 256 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 1 Mbps for RS232 channels and 15.625 Mbps for RS422 channels. The UART offers readable FIFO levels.

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

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

Mechanical Interface Switched Mezzanine Card (XMC) Interface confirming to ANSI/VITA 42.0-2008 and ANSI/VITA 20-2001 (R2005);
Standard single-width (149mm x 74mm)
Electrical Interface x1 PCI Express (Base Specification 2.0 Gen 1) compliant interface conforming to ANSI/VITA 42.3-2006 (XMC PCI Express Protocol Layer Standard)
PCIe Target Chip XR17V354 (Exar)
Transceiver RS232: MAX3245E (or equivalent)
RS422: MAX3077E (or equivalent)
IPMI Support per serial EEPROM, as defined in ANSI/VITA 42.0-2008
Interface Type Asynchronous serial interface
Number of Channels 4
Physical Interface TXMC463-10R: 4 RS232
TXMC463-11R: 4 RS422
TXMC463-12R: 2 RS232 / 2 RS422
TXMC463-15R: 4 RS232 (Motorola compatible pinout)
Serial Channel I/O Signals RS232: TxD, RxD, RTS, CTS, DTR, CD, DSR/RI, GND
RS422: TxD+/-, RxD+/-, GND
I/O Connector 4x RJ45 Modular Jack (AMP 406 732-1)
Termination RS422: 120 ohms between RxD+ and RxD- of each channel
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
Programmable Baud Rates RS232: up to 1 Mbps
RS422: up to 16 Mbps
FIFO 256 byte transmit FIFO, 256 byte receive FIFO per channel
Power Requirements VPWR is not used
TXMC463-10R: 70 mA typical @ +3.3V DC
TXMC463-11R: 110 mA typical @ +3.3V DC (no load)
TXMC463-12R: 90 mA typical @ +3.3V DC (no load)
TXMC463-15R: 70 mA typical @ +3.3V DC (no load)
Temperature Range Operating: -40 °C to +85 °C
Storage: -40 °C to +85 °C
MTBF 740 000 h
Weight 66 g
Humidity 5 – 95% non-condensing



4 Channel Serial RS232, RJ45

4 channels RS232 serial interface with full modem; baudrates up to 1 Mbps; 4x Front I/O via RJ45


4 Channel Serial RS422, RJ45

4 channels RS422 serial interface; baudrates up to 16 Mbps; 4x Front I/O via RJ45


2 Channel Serial RS232, 2 Channel Serial RS422, RJ45

2 channels RS232 serial interface with full modem support; baudrates up to 1 Mbps; 2 channels RS422 serial interface; 16 Mbps; 4x Front I/O via RJ45


4 Channel Serial RS232, RJ45 (Motorola compatible pinout)

4 channels RS232 serial interface with full modem; baudrates up to 1 Mbps; 4x Front I/O via RJ45 (Motorola compatible pinout)


Device Driver for Multiple Channel Serial Interface Family

Data Sheet

Data Sheet

Data Sheet - Issue 1.0.2

User Manual

User Manual - Issue 1.0.1