BCM5221A4KMLG

Drivers, Receivers, Transceivers Overview

The BCM5221A4KMLG is a single-channel Fast Ethernet transceiver manufactured by Broadcom Limited. It supports 10BASE-T, 100BASE-TX, and 100BASE-FX standards with an integrated voltage regulator allowing operation from a single 2.5V or 3.3V supply source. The device features intelligent power management with energy detection to minimize consumption in active standby states. It includes HP Auto-MDIX for automatic cable correction and robust CESD tolerance exceeding 5 kV. The component operates within an industrial temperature range of –40°C to 85°C and offers configurable MII and RMII interfaces.

Drivers, Receivers, Transceivers Feature Summary

• DSP-based Signi-PHY architecture ensures high interoperability and robust performance across voltage and temperature variations.
• Intelligent power management automatically powers down the device when no energy is detected on the cable to extend battery life.
• HP Auto-MDIX capability automatically detects and corrects crossed cables without manual intervention.
• Advanced cable diagnostic features enable remote monitoring and debugging of cabling infrastructure.

Drivers, Receivers, Transceivers Applications

• Servers using Network Controller Sideband Interface (NC-SI) via RMII
• PCMCIA and CardBus network adapters
• LAN on motherboard (LOM) implementations
• Wireless access points and embedded telecom equipment

Drivers, Receivers, Transceivers Procurement Notes

Verify component status as the BCM5221A4KMLG is listed as obsolete. Confirm availability through authorized distributors or secondary markets. Check for Product Change Notices regarding end-of-life notifications. Ensure replacement components meet identical electrical specifications and pinout compatibility for existing designs.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring low-power Fast Ethernet connectivity in space-constrained environments. Verify that the system design accommodates the specific 64-pin KML package dimensions. Ensure the host controller supports the required MII or RMII interface configurations. Consider the industrial temperature range requirements for deployment in harsh environments.

Drivers, Receivers, Transceivers Part Context

This component belongs to the BCM5221 family of mini-Phi transceivers designed for embedded 10/100 BASE-TX applications. It serves as a glueless TX-to-FX media conversion solution. The part integrates both copper and fiber optic PHY functionalities into a single chip, simplifying board layout and reducing overall system cost compared to discrete solutions.

Drivers, Receivers, Transceivers Replacement Considerations

Check for direct pin-compatible replacements within the same product family. Evaluate alternative low-power Fast Ethernet PHYs if the current part is unavailable. Ensure any substitute maintains support for the required 2.5V or 3.3V supply voltages and industrial temperature ratings.