4.25G 8x8 Crosspoint

The M21352 is an eight channel device designed to enable the transmission of multi gigabit serial data through the most challenging environments. The device features eight independent programmable equalizers that equalize data at rates up to 4.25 Gbps. Control of the M21352 is provided through an I2C compatible software control interface. The M21352 can also self-configure from an external EEPROM without the need for a host processor. For compatibility with PCI-Express and S-ATA/SAS systems, the M21352 is designed with an electrical idle passthrough function to drive the differential output to the common mode level during OOB signaling. Boundary scan is provided for high-speed input and output pins, and the device is available in a 10x10 mm, 72-pin QNF package.

Product Specifications

Part Number
4.25G 8x8 Crosspoint
Max Data Rate(Gbps)
Number of Channels
Embedded CDR
Power Consumption (W)
Package Size


  • Programmable Equalization for greater than 40" of FR-4 PCB trace at 4.25 Gbps
  • Integrated 8x8 Crosspoint Switch Matrix
  • Extended case temperature range (-20°C to 85°C)
  • 10x10 mm, 72 pin QFN package
  • HW, SW, AND EEPROM programmable
  • Up to 16 dB of input equalization and 6 dB of output de-emphasis
  • Low power dissipation: 115 mW per channel, 915 mW total power at 1.2V
  • Eight channel programmable equalizer for data rates up to 4.25 Gbps
  • Supports electrical idle signaling for PCIe and OOB signaling for SATA/ SAS

Technical Resources

Data Sheet

Order from MACOM

4.25GB/s 8x8 crosspoint switch EVM
Signal Conditioner 8x8 4.25G
M21352G-13 Distributors