TXMC391

Conduction Cooled, 4 Channel 1000BASE-KX Ethernet

Conduction Cooled single-width XMC module
4 channel 1000BASE-KX
IPMI resource: FRU hardware definition information stored in on-board EEPROM
PXE and iSCSI boot (16 Mbit serial flash)
IEEE 1588/802.1AS Precision Time Protocol (PTP) and IEEE 802.1Qav Audio/Video Bridging (AVB) traffic shaping
Rear I/O via P16 – All channels mapped in X12d range (VITA 46.9)

Product status: Active

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

The TXMC391 is a rugged, conduction cooled Switched Mezzanine Card (CCXMC) featuring four independent 1000BASE-KX Ethernet channels. Powered by Intel® I210IS Gigabit Ethernet controllers and accessible via a PCIe Gen 2 x4 interface, the TXMC391 ensures high-speed data throughput and reliable performance in demanding embedded systems.

Key features include support for IEEE 1588 Precision Time Protocol (PTP), IEEE 802.1Qav Audio/Video Bridging (AVB), and PXE/iSCSI boot via onboard 16 Mbit Flash per port. Each Ethernet channel is routed to the P16 back I/O connector and mapped to the X12d range as per VITA 46.9.

Designed for mission-critical environments, the TXMC391 operates reliably across an extended temperature range of -40°C to +85°C and includes a temperature sensor for thermal monitoring. Status LEDs indicate real-time network activity, and GPIO support enables auxiliary IEEE 1588 synchronization.

Perfect for high-availability systems in aerospace, defense, and industrial applications.

Software Support:

Software support for Intel I210IS at intel.com
For operating systems not supported by Intel®, please contact TEWS.

Mechanical Interface	Conduction Cooled Switched Mezzanine Card (CCXMC) Interface conforming to ANSI/VITA 42.0 and ANSI/VITA 20 Standard single-width (143.75 mm x 74 mm)
Electrical Interface	x4 PCI Express (Specification 2.1) compliant interface conforming to ANSI/VITA 42.3
PCIe Switch	PI7C9X2G608GP (Diodes Incorporated)
Gigabit Ethernet Controllers	For each interface: I210-IS (Intel)
16 Mbit Serial Flashes for Boot ROM	For each interface: W25Q16JV (Winbond)
Temperature Sensor	PCT2075 (NXP Semiconductors)
FRU Records EEPROM	M24C02-R (STMicroelectronics)
Number of Channels	4
I/O Standard	1000Base-KX
I/O Connector	Back I/O P16 (Samtec ASP-103614-04 or compatible) All ports mapped in X12d range (VITA 46.9)
Power Requirements	650mA typical @ VPWR = +5V (four channel, no link) 300mA typical @ VPWR = +12V (four channel, no link)
Temperature Range	Operating: -40 °C to +85 °C (Card Edge Temperature) Storage: -40 °C to +85 °C
MTBF	943000 h MTBF values shown are based on calculation according to MIL-HDBK-217F and MIL-HDBK-217F Notice 2; Environment: GB 20°C. The MTBF calculation is based on component FIT rates provided by the component suppliers. If FIT rates are not available, MIL-HDBK-217F and MIL-HDBK-217F Notice 2 formulas are used for FIT rate calculation.
Humidity	5 – 95% non-condensing
Weight	63 g

PRODUCT VARIATIONS

TXMC391-10R

4 Channel 1000BASE-KX Ethernet

4 Channel 1000BASE-KX Ethernet; P16 Back I/O (X12d); Conduction Cooled; IEEE 1588 auxiliary devices via Back I/O

SOFTWARE

Intel Ethernet Device Driver Package

Third Party Device Driver Support

Data Sheet

Data Sheet - Issue 1.0.0

User Manual

User Manual - Issue 1.0.0