LTC1485CS8#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC1485CS8#TRPBF is a low-power differential bus transceiver designed for multipoint data transmission in RS-485 applications. It features an extended common-mode range from -7V to +12V, supporting up to ±7V ground difference between devices. The device operates on a single 5V supply with typical supply current of 1.8mA. It includes thermal shutdown protection and fail-safe receiver outputs that guarantee a high state when inputs are open. ESD protection exceeds ±10kV. The component is housed in an 8-lead SOIC package.

Drivers, Receivers, Transceivers Feature Summary

• CMOS Schottky design provides power savings while maintaining ruggedness against overload and ESD damage.
• Driver and receiver feature three-state outputs; driver maintains high impedance over the entire common-mode range.
• Thermal shutdown circuit prevents excessive power dissipation by forcing driver outputs into a high impedance state during faults.
• Fail-safe receiver guarantees a high output state when inputs are left open.

Drivers, Receivers, Transceivers Applications

• Multipoint data transmission standard RS-485 applications
• RS-422 compliant communication systems
• Level translator circuits

Drivers, Receivers, Transceivers Procurement Notes

Verify the #TRPBF suffix indicates tape and reel packaging rather than tube packaging. Confirm the CS8 designation corresponds to the commercial temperature range (0°C to 70°C) and SOIC-8 package. Ensure the part number matches the specific Analog Devices manufacturing source to avoid counterfeit components.

Drivers, Receivers, Transceivers Selection Notes

Select this component for half-duplex RS-485 networks requiring low power consumption and extended common-mode voltage tolerance. It serves as a pin-compatible replacement for SN75176A, DS75176A, and SN75LBC176. Consider the thermal shutdown limits and ESD protection ratings when designing for harsh electrical environments.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC1485 series of low-power RS-485/RS-422 transceivers manufactured by Analog Devices. The CS8 variant specifically denotes the commercial temperature grade and plastic small outline package. It is distinct from the IN8 variant which covers the industrial temperature range.

Drivers, Receivers, Transceivers Replacement Considerations

Pin-compatible substitutes include SN75176A, DS75176A, and SN75LBC176. Verify electrical specifications such as supply current and common-mode range match application requirements before substitution.

Drivers, Receivers, Transceivers FAQ

What is the common-mode voltage range of the LTC1485?

The LTC1485 supports an extended common-mode range from -7V to +12V, permitting up to ±7V ground difference between devices on the bus.

How does the LTC1485 protect against excessive power dissipation?

It features a thermal shutdown circuit that forces the driver outputs into a high impedance state if internal temperature reaches 150°C, turning them back on at 130°C.

What happens to the receiver output if the inputs are left open?

The receiver has a fail-safe feature that guarantees a high output state when the inputs are left open or floating.