VSC7421XJG-04

Telecom Overview

The VSC7421XJG-04 is an unmanaged Layer 2 Ethernet switch IC from Microchip Technology, featuring 17 ports with 12 integrated copper PHYs. It supports data rates of 10 Mb/s, 100 Mb/s, and 1 Gb/s, adhering to standards including 10BASE-T, 100BASE-FX, and 1GBASE-TX. The device operates within a temperature range of -40°C to +125°C and utilizes a single 1V power supply. It is housed in an HSBGA-672 package for surface mount installation. Control interfaces include JTAG, SPI, UART, MIIM, QSGMII, SGMII, GPIO, IRQ, 2-Wire, and SIO.

Telecom Feature Summary

• Integrates 12 copper physical layer transceivers for direct connection to twisted-pair cabling without external PHY components.
• Provides unmanaged Layer 2 switching capabilities for straightforward network segmentation and traffic forwarding.
• Supports multiple high-speed serial interfaces including QSGMII and SGMII for uplink connectivity.
• Operates reliably in industrial environments with extended temperature ratings.

Telecom Applications

• Industrial Ethernet networks requiring robust switching in harsh conditions.
• Unmanaged network segments in automation and control systems.
• Edge devices needing compact integration of multiple copper Ethernet ports.
• Telecom infrastructure equipment utilizing QSGMII/SGMII uplinks.

Telecom Procurement Notes

Verify the specific suffix '04' corresponds to the industrial temperature grade (-40°C to +125°C) as defined by Microchip. Confirm the HSBGA-672 package requirements during design-in. Ensure compatibility with the 1V core voltage domain. Check for moisture sensitivity level (MSL) handling instructions due to the BGA package type. Validate that the unmanaged L2 functionality meets the target application's networking needs without requiring complex configuration.

Telecom Selection Notes

Select this component when a high-port-count unmanaged switch with integrated copper PHYs is required. It is suitable for designs needing 12 copper ports plus additional uplink options via serial interfaces. Consider the HSBGA-672 package size and thermal dissipation characteristics. Compare against managed switches if VLAN or QoS features are necessary, as this device lacks such capabilities. Ensure the system architecture supports the 1V power rail requirement.

Telecom Part Context

This part belongs to the VSC7421 series of Ethernet switches from Microchip Technology. The series focuses on providing high-density switching solutions with integrated PHYs to reduce bill-of-materials complexity. The VSC7421XJG-04 specifically denotes the industrial temperature variant within this family, designed for demanding operational environments compared to commercial grade alternatives.

Telecom Replacement Considerations

Consult Microchip documentation for direct pin-to-pin or functional equivalents within the VSC7421 family. Verify if other suffixes offer different temperature ranges or packaging options. No third-party substitutes are publicly confirmed; cross-referencing with official Microchip replacement guides is recommended.