The Am79C874 NetPHY™-1LP Low Power 10/100-TX/FX Ethernet Transceiver is a 10/100BASE-TX Ethernet PHY device with 100BASE-FX fiber optic support. It consumes a typical power of 0.3 W and can reliably send/receive data over cable lengths greater than 130 meters.
The Am79C874 NetPHY‑1LP provides the PHY layer and transceiver functions for a single 10/100 Mbps Ethernet port. It operates from a single 3.3 V supply, consumes only 0.3 W in typical mode, and offers three power‑management modes for further reduction.
The device is supplied in a 12 mm × 12 mm 80‑pin TQFP package, supports industrial temperature ranges, and includes built‑in input filtering, waveshaping, LED status pins, MDIO/MDC up to 25 MHz, and auto‑negotiation with polarity correction.
| Typical power consumption | 0.3 W |
|---|---|
| Power‑down mode consumption | 3 mW |
| Unplugged mode consumption | 100 mW |
| Idle‑wire mode consumption | 285 mW |
| Package | 12 mm × 12 mm 80‑pin TQFP |
| Operating voltage | 3.3 V (5 V I/O tolerant) |
| Industrial temperature range | -40 °C to +85 °C |
| Supported Ethernet standards | 10/100BASE‑TX and 100BASE‑FX |
The device typically consumes 0.3 W.
It supports an industrial temperature range from –40 °C to +85 °C.
It is housed in a 12 mm × 12 mm 80‑pin TQFP package.
The device offers Power‑down (3 mW), Unplugged (100 mW), and Idle‑wire (285 mW) modes.