Microchip Technology EQCO62R20.3

Overview

EQCO62R20.3 from Microchip Technology is a 6.25 Gbps asymmetric coaxial equalizer receiver IC for CoaXPress v1.1 camera interfaces, designed for the frame grabber side of bidirectional links over single 75Ω coax. It receives downlink data up to 6.25 Gbps with adaptive equalization, transmits 21 Mbps uplink control signals, and supports power-over-coax up to 900 mA. Its role is signal recovery and low-speed uplink transmission in machine vision inspection systems.

For engineers reviewing the EQCO62R20.3 datasheet, EQCO62R20.3 pinout, EQCO62R20.3 application, or EQCO62R20.3 equivalent, this device is selected for high-bandwidth, long-reach camera links requiring simultaneous power, video, and trigger transport over one coax cable - especially where jitter <0.35 UI at 6.25 Gbps and industrial temperature operation (–40°C to +85°C) are critical.

Technical Context

The EQCO62R20.3 implements an auto-adaptive analog equalizer core that compensates cable attenuation across 1.25–6.25 Gbps using 8B/10B NRZ coding, converging within microseconds upon valid signal detection. It integrates a CML differential input (SDIp/SDIn) with on-chip 60Ω termination and external 15Ω series resistors, and a CML differential output (SDOp/SDOn) with 2×50Ω on-chip termination and 2×600 mV swing.

Its uplink path accepts a 1.2V LVTTL LFI input, conditions it via programmable amplitude (AmpR) and rise/fall time (RiseR) control, and drives the coax with 130 mV amplitude and 11 ns rise/fall time. Power-over-Coax is supported via external ferrite beads and 10 µH inductor, with hot-plug protection and PoCXP compatibility.

Key Specifications

Pinout & Package

EQCO62R20.3 is housed in a 16-pin, 0.65 mm pitch, 4 mm × 4 mm × 0.9 mm QFN package with exposed thermal pad. Pin 1 is marked by a corner chamfer; the thermal tab (GND TAB) is electrically connected to ground.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar coaxial equalizer/receiver applications.

Compared with EQCO31R20.3 and MAX9275GTJ+, the EQCO62R20.3 uniquely delivers full 6.25 Gbps CoaXPress v1.1 compliance with integrated adaptive equalization, PoCXP, and hot-plug protection - making it the only option for new high-bandwidth industrial vision systems requiring single-cable simplicity and guaranteed jitter performance.

Availability

EQCO62R20.3 is available at Aetrix Electronics and suitable for machine vision inspection, broadcast camera interfaces, and traffic monitoring systems requiring stable component supply, long-cable signal integrity, and power-over-coax integration.

Supply support for EQCO62R20.3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a global provider of microcontrollers, analog devices, and connectivity solutions, with expertise in high-speed interface ICs for industrial and imaging applications.

The EQCO62R20.3 belongs to Microchip's CoaXPress chipset family, engineered specifically for bidirectional, high-bandwidth camera-to-host communication over coax - targeting machine vision, medical imaging, and broadcast systems needing consolidated power, data, and control transport.

FAQ

What is the maximum coax cable length supported by EQCO62R20.3 at 6.25 Gbps?

At 6.25 Gbps, EQCO62R20.3 supports up to 68 meters using Belden 7731A coax and up to 46 meters using Canare L-7CFB, as verified in DS60001302C Table 1 and Table 3. Performance varies with cable type, quality, and environmental conditions; actual reach must be validated with the specific coax and layout used in the target system. EQCO62R20.3 achieves this via its auto-adaptive equalizer core, which dynamically compensates for frequency-dependent loss.

Does EQCO62R20.3 require external configuration or firmware to operate?

No, EQCO62R20.3 operates autonomously without external configuration or firmware. Its equalizer core adapts in microseconds upon signal detection using a time-continuous feedback loop, and uplink amplitude/rise time is set by passive resistors (AmpR, RiseR) tied to VCC. The EQCO62R20.3 is fully functional once powered and connected - no I²C, SPI, or register programming is needed for basic CoaXPress v1.1 operation.

Can EQCO62R20.3 be used without Power-over-Coax (PoCXP)?

Yes, EQCO62R20.3 functions fully in data-only mode without PoCXP. Its downlink equalization and uplink transmission operate independently of power delivery. External inductors and ferrite beads (Fb1, Fb2, L1) are omitted when PoCXP is not required, simplifying the BOM and layout. However, the EQCO62R20.3 remains compatible with PoCXP if added later, as all necessary protection and biasing circuitry is internal.

What is the purpose of the AmpR and RiseR pins on EQCO62R20.3?

AmpR and RiseR are analog configuration inputs that set the uplink transmitter's output amplitude and edge rate, respectively. Connecting AmpR to VCC via a 1.2 kΩ resistor sets 130 mV transmit amplitude; connecting RiseR to VCC via a 10 kΩ resistor sets 11 ns rise/fall time - both optimized for CoaXPress v1.1 uplink compliance. If left unconnected, the uplink driver is disabled, allowing use of EQCO62R20.3 in receive-only configurations.

Is EQCO62R20.3 pin-compatible with EQCO31R20.3?

Yes, EQCO62R20.3 and EQCO31R20.3 share identical 16-pin QFN packaging, pinout, footprint, and electrical interface - including VCC, GND, SDIp/SDIn, SDOp/SDOn, LFI, AmpR, and RiseR assignments. This allows direct PCB-level substitution where bandwidth requirements permit, though EQCO62R20.3 delivers full 6.25 Gbps capability while EQCO31R20.3 is limited to 3.125 Gbps.