The Am79C874 NetPHY™-1LP is a 10/100BASE-TX Ethernet PHY device that supports 100BASE-FX fiber optic connection, has a typical power consumption of 0.3 W, and can reliably send/receive data over cable lengths greater than 130 meters.
The Am79C874 NetPHY‑1LP is a low‑power Ethernet PHY that supports 10/100‑BASE‑TX and 100‑BASE‑FX operation. It operates from a single 3.3 V supply, is 5‑V I/O tolerant, and consumes as little as 0.3 W in typical mode.
The device includes multiple LED indicators, MII and 7‑wire GPSI interfaces, and offers three power‑saving modes (Power‑Down, Unplugged, Idle Wire). It is offered in a 12 mm × 12 mm 80‑lead TQFP package and is qualified for industrial temperature ranges.
| Typical power consumption | 0.3 W |
|---|---|
| Package dimensions | 12 mm × 12 mm, 80‑lead TQFP |
| Supply voltage | 3.3 V (5 V I/O tolerant) |
| LED indicators | Link, TX activity, RX activity, Collision, 10 Mbps, 100 Mbps, Full/Half Duplex |
| Maximum MDIO/MDC clock | 25 MHz |
| Transformer options | 1:1 or 1.25:1 transmit transformer |
| External filter requirement | None |
The device typically consumes 0.3 W.
No, the device operates without external filters or chokes.
It can connect via standard MII, a 5‑bit symbol interface, or a 7‑wire GPSI interface.