78Q2133R/F

Overview

The 78Q2133R/F is a MicroPHY Fast Ethernet transceiver supporting 10BASE-T and 100BASE-TX standards. It integrates MII, ENDECs, scrambler/descrambler, dual-speed clock recovery, and auto-negotiation functions. The device operates from a single 3.3V ± 0.3V supply with typical power consumption of approximately 290mW. It features an on-chip pulse-shaper, low-power line driver, adaptive equalizer, and baseline restoration circuit. The component is rated for industrial temperature operation ranging from -40°C to +85°C.

Feature Summary

• Integrated full-featured auto-negotiation and automatic MDI/MDI-X crossover correction
• Supports power-saving modes including chip power-down and receive power management
• Includes two programmable LED indicators and a user-programmable interrupt pin

Applications

• Embedded Ethernet systems in game consoles
• Broadband modems and set-top boxes
• Printers and audio/video equipment

Procurement Notes

Verify the specific suffix 'R/F' against official documentation to confirm package type and tape-and-reel configuration. Ensure the industrial temperature grade (-40°C to +85°C) matches system requirements. Confirm that the manufacturer designation aligns with current Analog Devices or Maxim Integrated product lines.

Selection Notes

Select this component for applications requiring a compact 10/100 PHY solution with low power consumption. The integrated MII interface simplifies connection to MAC controllers. Consider the industrial temperature rating for environments exceeding commercial limits. Verify compatibility with required isolation transformers and external 25MHz clock sources.

Part Context

The 78Q2133 belongs to the MicroPHY family of Fast Ethernet transceivers, designed as one of the smallest solutions available for 10BASE-T/100BASE-TX applications. It serves as the industrial-grade counterpart to the 78Q2123, which is rated for commercial temperatures. The series targets embedded markets needing space-constrained, low-power networking interfaces.

Replacement Considerations

The 78Q2123 is a direct functional substitute with identical electrical characteristics, differing only in the operating temperature range (commercial vs. industrial). Verify that any replacement maintains the same 32-QFN or 32-TQFN package dimensions and pinout compatibility.