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LTC485CS8#PBF

LTC485CS8#PBF

Analog Devices (Linear Technology)
Alternative single transceiver offering from the Linear/ADI product family
NRND6,464 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The LTC485CS8 is a single, half-duplex RS-422/RS-485 transceiver in an 8-pin SOIC package intended for 5 V systems. It integrates a driver and receiver with 70 mV receiver hysteresis and operates from 4.75 V to 5.25 V. The device is designed for multi-drop, differential serial communications over twisted-pair cabling.

Why Choose This Part

Choose the LTC485CS8 when you need a compact, 5 V-compatible RS-422/485 transceiver with simple single-transceiver topology. Its SOIC-8 package makes it easy to route and assemble on PCBs while the internal hysteresis and failsafe behavior improve noise immunity on long or noisy links. Being a single 1-driver/1-receiver device is convenient for point-to-point or multi-drop half-duplex networks where you want minimal pin count and straightforward direction control.

Applications

Industrial fieldbus nodes
Interface PLCs, motor controllers, and sensors to multi-drop RS-485 networks over long cable runs.
Serial line converters and gateways
Use in UART-to-RS485 converter modules and protocol gateways for Modbus, Profibus-lite, and similar stacks.
Building automation and HVAC
Connect controllers, sensors, and actuators in building management systems that require reliable differential signaling.
Data acquisition and telemetry
Link remote data-acquisition units and telemetry modules to a central logger across noisy environments.
Legacy serial device support
Add isolated or robust RS-485/RS-422 ports to embedded boards to communicate with existing industrial equipment.

Key Specifications

Type Transceiver
Duplex Half
Protocol RS422, RS485
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Voltage - Supply 4.75V ~ 5.25V
Receiver Hysteresis 70 mV
Operating Temperature 0degC ~ 70degC
Supplier Device Package 8-SO
Number of Drivers/Receivers 1/1

Getting Started

No specific development board or IDE is required; integration is done at the schematic and PCB level. Typical startup includes connecting the device TX/RX pins to a UART on your MCU, controlling DE/RE (driver enable/receiver enable) pins to manage half-duplex direction, adding 120 ohm termination at each end of the bus, and implementing biasing resistors or a network to guarantee a defined idle bus state. Verify cabling (twisted pair), proper grounding, and use of transient suppression if the installation is exposed to high electrical stress.

Also Consider

SN75176B (SOIC-8) TITexas Instruments - Industry-standard, low-cost RS-485 transceiver available in SOIC-8 - a common replacement in legacy and cost-sensitive designs.