DESCRIPTION OF FUNCTION
The M75176P to M75179P are line interface ICs which meet EIA standards RS-422A and RS-485, and are suitable for long-distance, high-speed data transmission.The M75176P is designed to connect the driver circuit output and the receiver input to each other internally,and serves as a line transceiver. The M75177P/M75178P is designed to connect the receiver circuit output and the driver circuit input internally,and serves as a line repeater.The M75177P and M75178P enter the output enabled state with active"H"and active"L", respectively. The M75179P is equipped with a built-in differential driver and a built-in differential receiver.It does not have an output control input pin but its output impedance at the power-OFF time goes high.
FEATURES
Common
·5V single power supply
·With output control input (except M75179P)
Driver
·54Ω terminal resistor connectable between outputs.
·High output impedance at power-OFF time
·Built-in output current limit circuit
Receiver
·High input sensitivity (±200mV max.)
·Hysteresis input (50mV typ.)
·High input impedance (12k? min.)
·"H" emitted when input is open (failsafe function)