GENERAL DESCRIPTION

The ML4662 10Base-FL transceiver combined with the ML4622 or ML4624 fiber optic quantizers provides all of the functionality required to implement both an internal and external IEEE 802.3 10Base-FL MAU. The ML4662 offers a standard IEEE 802.3 AU interface that allows it to be directly connected to industry standard manchester encoder/decoder chips or and AUI cable.

The ML4662 provides a highly integrated solution that requires a minimal number of external components, and is compliant to the IEEE 802.3 10Base-FL standard. The transmitter offers a current driven output that directly drives a fiber optic LED transmitter. Jabber, a 1MHz idle signal, and SQE Test are fully integrated onto the chip.

The receiver accepts and ECL level input coming from the ML4622 or ML4624 fiber optic quantizers. The 1MHz idle signal is removed and the AUI output is activated when the receive squelch criteria is exceeded. A Link Monitor function is also provided for low light detection.

FEATURES

■ Combined with the ML4622 or ML4624, offers a

complete implementation of an 10Base-FL Medium

Attachment Unit (MAU)

■ Incorporates an AU interface for use in an external

MAU or an internal MAU

■ Single +5 volt supply ±10

■ No crystal or clock required

■ On-chip Jabber, 1MHz idle, and SQE Test with enable/disable option

■ Five network status LED outputs