BCM53718A2KFEBG

Overview

The BCM53718A2KFEBG is a high-performance, single-chip Gigabit Ethernet switch designed for residential and small office/home office (SOHO) gateways. It integrates a four-port Gigabit Ethernet MAC with an integrated Gigabit PHY and a three-port Gigabit Ethernet MAC with an integrated Fast Ethernet PHY. The device features a built-in MIPS-based processor core to support advanced routing functions, including NAT, firewall, and QoS. It supports IEEE 802.1p/q VLAN tagging and offers hardware-accelerated packet processing for efficient traffic management in broadband access applications.

Feature Summary

• Integrates a MIPS-based processor core for local routing and control plane processing
• Combines four Gigabit Ethernet ports with integrated PHYs and one Fast Ethernet port
• Supports IEEE 802.1p/q VLAN tagging and hardware-accelerated QoS policies
• Includes hardware acceleration for NAT, firewall, and IPsec encryption

Applications

• Residential gateway platforms requiring integrated routing and switching
• Small office/home office (SOHO) broadband routers
• Fiber-to-the-home (FTTH) ONT/ONT+ devices
• Cable modem termination systems with routing capabilities

Procurement Notes

Verify the specific suffix 'A2KFEBG' against the manufacturer's official datasheet to confirm pinout compatibility and temperature range specifications. Ensure that the source document explicitly lists this part number as an active or recommended component for new designs, as older silicon revisions may have different electrical characteristics or software support requirements.

Selection Notes

Select this component when a design requires a single-chip solution combining Layer 2 switching with Layer 3 routing capabilities. It is suitable for applications needing integrated Gigabit and Fast Ethernet interfaces without external PHYs. Consider the MIPS core performance if complex firmware features like VPN or advanced QoS are required, ensuring the available memory resources meet the application's stack size needs.

Part Context

This part belongs to Broadcom's BCM53xx series of integrated Ethernet switches. These chips are widely used in consumer networking equipment due to their high integration level. The BCM53718 variant specifically targets cost-sensitive yet feature-rich gateway markets, bridging the gap between simple switches and full-featured enterprise routers by providing essential home networking protocols in a compact package.

Replacement Considerations

Check for direct pin-compatible upgrades within the BCM537xx family, such as the BCM53719 or BCM53720, which may offer enhanced CPU performance or additional memory interfaces. Verify software driver compatibility before substitution, as firmware binaries are often specific to the exact silicon revision and feature set of the original part.