Microchip Technology LAN8804 4-Port Gigabit Ethernet Transceivers

Microchip Technology LAN8804 4-Port Gigabit Ethernet Transceivers are low-power, quad-port, triple-speed (10BASE-T/100BASE-TX/1000BASE-T) Ethernet physical layer transceivers (PHY) that support transmission and reception of data on standard CAT-5, CAT-5e, and CAT-6 Unshielded Twisted Pair (UTP) cables. LAN8804 supports industry-standard QSGMII (Quad Serial Gigabit Media Independent Interface), providing chip-to-chip connections to four Gigabit Ethernet MACs using a single serialized link (differential pair) in each direction. Using on-chip termination resistors for the line-facing differential pairs, the LAN8804 reduces board cost and simplifies board layout.

Diagnostic features facilitate system bring-up and debugging in production testing and product deployment. The LinkMD TDR-based cable diagnostic identifies faulty copper cabling. Integrated loopback functions verify analog and digital data paths. Microchip Technology LAN8804 4-Port Gigabit Ethernet Transceivers are available in a 128-pin, RoHS-compliant TQFP package with commercial (0°C to +85°C) and industrial
(-40°C to +85°C) temperature ranges.

Features

Quad-port Gigabit Ethernet transceiver
QSGMII Version 1.3 MAC interface
Jumbo frame support up to 16KB
Clocked from crystal or external 25/125MHz reference clock input
Time Sensitive Networking (TSN) frame preemption support per IEEE 802.3™-2018 clause 99
IEEE 802.3-2018 Energy Efficient Ethernet (EEE)
2x programmable LED outputs per port for link, activity, and speed
Coma mode to eliminate port link bouncing at startup and synchronize LEDs
24x GPIOs
LinkMD® TDR-based cable diagnostic to identify faulty copper cabling
Signal quality indication
Loopback modes for diagnostics
Automatic MDI/MDI-X crossover to detect and correct pair swaps, pair skew, and pair polarity
Shared Management Data Input/Output (MDIO) interface for PHY register configuration

Interrupt pin option
Die temperature monitor
Power-down and power-saving modes
- Energy detect power down
- Chip power down
- EEE low power idle mode
- Smart power savings up to 20mW for cables <70m
Operating voltages
- 1.1V digital core (VDDCORE)
- 1.1V (VDDAL) and 2.5V, 3.3V (VDD33REF) analog operations
- 3.3V, 2.5V, or 1.8V VDD I/O (VDDIO)
- 3.3V or 2.5V transceiver (VDDAH)
128-pin TQFP (14mm × 14mm body) package
Temperature support
- 0°C to +85°C commercial range
- -40°C to +85°C industrial range
RoHS-compliant