78Q2133SR/F

Overview

The 78Q2133 is a MicroPHY Fast Ethernet transceiver rated for industrial temperature ranges (-40°C to +85°C). It supports 10BASE-T and 100BASE-TX standards over Category-3 and Category-5 UTP cabling. The device integrates MII, ENDECs, scrambler/descrambler, dual-speed clock recovery, and auto-negotiation functions. It operates from a single 3.3V ±0.3V supply with typical power consumption of approximately 290mW. The component interfaces via an IEEE-802.3 compliant Media Independent Interface (MII) and utilizes a 25MHz reference clock. It is housed in a compact 32-QFN or 32-TQFN package measuring 5x5 mm.

Feature Summary

• Integrated full-featured auto-negotiation supporting 10/100 Mbps speeds
• Automatic MDI/MDI-X crossover correction and polarity reversal
• Programmable transmit amplitude and LED indicators
• Multiple power-saving modes including chip power-down and receive management

Applications

• Game consoles
• Broadband modems
• Printers
• Set top boxes
• Audio/video equipment

Procurement Notes

Verify the specific suffix 'SR/F' against official Analog Devices documentation to confirm exact packaging configuration. Ensure the industrial temperature rating aligns with system requirements. Confirm availability through authorized distributors as stock levels fluctuate. Validate RoHS compliance status prior to integration.

Selection Notes

Select the 78Q2133 when industrial temperature operation is required, distinguishing it from the commercial-rated 78Q2123. Consider the integrated PHY capabilities if minimizing external components is a priority. Evaluate the 32-pin QFN/TQFN footprint constraints against PCB layout limitations. Verify compatibility with the host MAC's MII interface timing requirements.

Part Context

The 78Q2133 belongs to the MicroPHY family of 10/100BASE-TX transceivers manufactured by Analog Devices (formerly Maxim Integrated). This series is designed for embedded Ethernet applications requiring small form factors and low power consumption. The 78Q2133 variant specifically targets environments demanding extended operating temperatures compared to standard commercial parts.

Replacement Considerations

The 78Q2123 serves as the commercial temperature range equivalent. Cross-referencing with other MicroPHY models may require verifying pinout compatibility and register settings. No direct public substitute part numbers are confirmed in the provided datasheet.