November 2007 Rev 4 1/17
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ST75C176B
ST75C176C
Low power RS-485/RS-422 transceiver
Features
■ Low quiescent current: 300 mA
■ Designed for RS-485 interface applications
■ -7 V to 12 V common mode input voltage range
■ Driver maintains high impedance in 3-state or
with the power OFF
■ 70 mV typical input hysteresis
■ 30 ns propagation delays, 5 ns skew
■ Operate from a single 5 V supply
■ Current limiting and thermal shutdown for
driver overload protection
■ Allows up to 32 transceivers on the bus
■ BiCMOS technology
Description
The ST75C176B/C is al low power transceiver for
RS-485 and RS-422 communication. Each part
contains one driver and one receiver.
This transceiver draw 300 mA (typ.) of supply
current when unloaded or fully loaded with
disabled drivers.
It operates from a single 5 V supply.
Driver is short-circuit current limited and is
protected against excessive power dissipation by
thermal shutdown circuitry that placed the driver
outputs into a high-impedance state. The receiver
input has a fail safe feature that guarantees a
logic-high output if the input is open circuit.
The ST75C176B/C is designed for bidirectional
data communications on multipoint bus
transmission line (half-duplex applications).
DIP-8
Table 1. Device summary
Order code Temperature range Package Packaging
ST75C176CN 0 to 70 °C DIP-8 50parts per tube / 40tube per box
ST75C176BN -40 to 85 °C DIP-8 50parts per tube / 40tube per box
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