M75176P Datasheet, PDF (1/9 Pages) Mitsubishi Electric Semiconductor – RS-485 TRANSCEIVER

MITMSITUSBUISBHISI H〈DI I〈GDIITGAITLAALSASSPS〉 P〉
M75176MP7,5M1767P5, M1775717P7P
M75178MP7,5M1787P5, M1775917P9P
RSR-4S8-548T5RTARNASNCSECIVEEIVRER
DESCRIPTION
Each of the M75176 to M75179 is a semiconductor IC with a
built-in differential driver and a built-in differential receiver
both of which meet the EIA standards RS-422A and RS-485.
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 (12kΩ min.)
• “H” emitted when input is open (failsafe function)
APPLICATION
High-speed data transmission interface for digital equipment
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 im-
pedance at the power-OFF time goes high.
PIN CONFIGURATION (TOP VIEW)
RECEIVER OUTPUT R ← 1
RECEIVER OUTPUT
CONTROL INPUT
RE →
2
DRIVER OUTPUT
CONTROL INPUT
DE →
3
DRIVER INPUT D → 4
8
VCC
7 ↔B
6 ↔A
I/O BUS
5
GND
M75176P
VCC 1
REPEATER OUTPUT T ← 2
OUTPUT CONTROL INPUT EN → 3
GND 4
8 ←A
7 ←B
RECEIVER INPUT
6 →Z
5 →Y
DRIVER OUTPUT
M75177P
VCC 1
REPEATER OUTPUT T ^← 2
OUTPUT CONTROL INPUT EN → 3
GND 4
8 ←A
7 ←B
RECEIVER INPUT
6 →Z
5 →Y
DRIVER OUTPUT
M75178P
VCC 1
RECEIVER OUTPUT R ← 2
DRIVER INPUT D → 3
GND 4
8 ←A
7 ←B
RECEIVER INPUT
6 →Z
5 →Y
DRIVER OUTPUT
M75179P
Outline 8P4
1