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GENERAL DESCRIPTION

The Am79761 Gigabit Ethernet Physical Layer Serializer/Deserializer (GigaPHY-SD) device is a 1.25 Gbps Ethernet Transceiver optimized for Gigabit Ethernet/ 1000BASE-X applications. It implements the Physical Medium Attachment (PMA) layer for a single port.

The GigaPHY-SD device can interface to fiber-optic media to support 1000BASE-LX and 1000BASE-SX applications and can interface to copper coax to support 1000BASE-CX applications.

DISTINCTIVE CHARACTERISTICS

■ Gigabit Ethernet Transceiver operates at 1.25 Gigabits per second (Gbps)

■ Suitable for both Coaxial and Optical Link applications

■ 10-bit TTL Interface for Transmit and Receive Data

■ Monolithic Clock Synthesis and Clock Recovery requires no external components

■ Word Synchronization Function (Comma Detect)

■ Low Power Operation - 700 mW typical

■ 64-pin Standard PQFP

— 14 x 14 mm (0? C - 70? C)

— 10 x 10 mm (0? C - 50? C)

■ 125 MHz TTL Reference Clock

■ Loopback Diagnostic

■ Single +3.3 V Supply