F104S8A

Overview

The F104S8A is a quad-port 10/100/1000BASE-T PHY with an integrated QSGMII MAC interface, designed for high-density networking applications. It supports IEEE 802.3 standards including 10BASE-T, 100BASE-TX, and 1000BASE-T over Cat5 twisted pair media. The device features Energy Efficient Ethernet (EEE) compliance and IEEE 802.3af Power over Ethernet support. Key specifications include a serial management interface (SMI), GPIO pins, and JTAG boundary scan capabilities. It operates within a voltage range of 2.5 V and 1.2 V for specific domains, supporting data rates up to 1 Gbps per port.

Feature Summary

• Integrated Quad-Port PHY with QSGMII MAC Interface
• Energy Efficient Ethernet (EEE) Compliance
• IEEE 802.3af Power Over Ethernet Support
• Comprehensive Diagnostic and Loopback Testing Features

Applications

• High-density network switches and routers
• Industrial Ethernet gateways
• Telecommunications infrastructure equipment
• Embedded networking systems requiring compact form factors

Procurement Notes

Verify the exact ordering suffix against the manufacturer's official documentation to ensure correct package type and temperature grade. Confirm that the component meets all required industry certifications for your specific deployment environment. Cross-reference the datasheet revision date with your design timeline to account for any potential updates in electrical characteristics or pin definitions.

Selection Notes

Select this component when a single-chip solution for four Gigabit Ethernet ports is required to reduce board space. Ensure the host processor supports the QSGMII interface protocol for efficient data transfer. Verify power supply constraints align with the device's 2.5 V and 1.2 V requirements. Consider the thermal dissipation capabilities of the chosen package if operating in enclosed industrial environments.

Part Context

Originally developed by Vitesse Semiconductor and later acquired by Freescale Semiconductor, which is now part of NXP USA Inc. This device belongs to the family of high-performance Ethernet transceivers designed for demanding networking applications. It represents a consolidation of PHY and MAC functionalities to simplify system architecture.

Replacement Considerations

Check for updated revisions from NXP or compatible devices from other manufacturers offering similar quad-port PHY configurations with QSGMII interfaces. Ensure pin compatibility and register map similarities if direct replacement is intended without redesigning the PCB layout.

FAQ

Does the F104S8A support Power over Ethernet?

Yes, the device supports IEEE 802.3af Power over Ethernet, allowing it to deliver power to connected inline-powered devices.

What interface connects the F104S8A to the MAC?

The F104S8A features an integrated QSGMII (Quad Serial Gigabit Media Independent Interface) MAC interface for connecting to the host processor.

Is Energy Efficient Ethernet supported?

Yes, the F104S8A complies with IEEE 802.3az Energy Efficient Ethernet (EEE) standards to reduce power consumption during periods of low link utilization.