DESCRIPTION
The SY100S891 is a 5-bit registered transceiver containing five bus transceivers with both transmit and receive registers. The bus outputs (BUS0 – BUS4) are specified for driving a 25 ohm bus and the receive outputs (Q0 – Q4) are specified for driving a 50 ohm line. The bus outputs have a normal high level output voltage and a normal low level output voltage when the bus enable (BUSEN0 – BUSEN4) is high. However, the output is switched to a cut-off level when a bus-enable is low.

FEATURES
■ 25Ω cut-off bus outputs
■ 50Ω receiver outputs
■ Transmit and receive registers with separate clocks
■ 1500ps max. delay from CLK1 to Bus Outputs (BUS)
■ 1500ps max. delay from CLK2 to Receiver Outputs (Q)
■ Individual bus enable pins
■ Internal 75KΩ input pull-down resistors
■ Voltage and temperature compensation for improved noise immunity
■ Industry standard 100K ECL levels
■ Extended supply voltage option: VEE = –4.2V to –5.5V
■ Available in 28-pin PLCC package