Am79C874 Datasheet PDF | Advanced Micro Devices

Advanced Micro Devices Am79C874

The Am79C874 NetPHY-1LP device provides the physical (PHY) layer and transceiver functions for one 10/100 Mbps Ethernet port. It delivers the dual benefits of CMOS low power consumption and small package size. The small 12x12 mm 80-pin PQL package conserves valuable board space on adapter cards, switch uplinks, and embedded Ethernet applications.

Part No.	Am79C874
Datasheet	Am79C874 Download
Manufacturer	Advanced Micro Devices
Description	NetPHY-1LP Low Power 10/100-TX/FX Ethernet Transceiver
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GENERAL DESCRIPTION

Operating at 3.3 V, it consumes only 0.3 W. Three power management modes provide options for even lower power consumption levels. The NetPHY-1LP 10/100 Mbps Ethernet PHY device is IEEE 802.3 compliant. It can receive and transmit data reliably at over 130 meters. It includes on-chip input filtering and output waveshaping for unshielded twisted pair operation without requiring external filters or chokes. The NetPHY-1LP device can use 1:1 isolation transformers or 1.25:1 isolation transformers. 1.25:1 isolation transformers provide 20% lower transmit power consumption. A PECL interface is available for 100BASE-FX applications. Interface to the Media Access Controller (MAC) layer is established via the standard Media Independent Interface (MII), a 5-bit symbol interface, or a 7-wire (GPSI) interface. Auto-Negotiation determines the network speed and full or half-duplex operation. Automatic polarity correction is performed during Auto-Negotiation and during 10BASE-T signal reception.