EQCO125X40C1-I/8EX

Overview

The EQCO125X40C1-I/8EX is a single-chip equalizer, driver, and reclocker designed for high-speed asymmetric full-duplex communication. It supports downstream bit-rates from 1.25 Gbps to 12.5 Gbps and simultaneous uplink signaling at 20.833 Mbps or 41.666 Mbps using 8b/10b coding. The device operates on a single 1.25 V supply and features integrated termination resistors and reference-clock-free Clock-Data Recovery (CDR). Packaged in a 16-pin, 4x4 mm QFN with 0.65 mm pitch, it functions as a CoaXPress transmitter, receiver, or standalone cable repeater.

Feature Summary

• Supports simultaneous power transmission over coax alongside data channels
• Integrates auto-adaptive equalization and jitter-resetting CDR
• Compatible with 75 Ω coax, 50 Ω coax, and 100 Ω STP cables

Applications

• CoaXPress compliant systems supporting all standards and speeds
• High-definition camera links and FPGA interconnects
• Machine vision, military, aerospace, medical, broadcast, and surveillance cameras
• Intelligent traffic systems requiring long cable lengths

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature range. Confirm current production status and availability through authorized distributors, as component lifecycle stages may change. Ensure compatibility with required cable types and system voltage specifications before procurement.

Selection Notes

Select this component when designing asymmetric full-duplex links requiring up to 12.5 Gbps downlink speeds. It is suitable for both camera-side and frame grabber-side implementations due to identical chip usage. Consider its integration of CDR and equalization for applications needing extended cable reach without external signal conditioning components.

Part Context

This part belongs to the EQCO125X40 Family, which includes variants like the EQCO125T40 for cost-sensitive device-side applications. The family enables flexible deployment in CoaXPress 2.0 environments, allowing designers to use the same silicon across different link roles while maintaining high throughput and low latency.

Replacement Considerations

Microchip recommends the EQCO125X40C1T-I/3DW as a manufacturer-recommended alternative. Verify pinout compatibility and electrical characteristics before substitution.

FAQ

What is the maximum downstream data rate supported by the EQCO125X40?

The device supports a downstream bit-rate ranging from 1.25 Gbps up to 12.5 Gbps.

Does the EQCO125X40 require an external clock source?

No, the device features reference-clock-free operation and does not require an external crystal or clock.

Can the EQCO125X40 be used as a standalone repeater?

Yes, it can function as a stand-alone cable repeater, simultaneously handling power, downlink, and uplink signals over a single cable.