LTC1485IN8#PBF

Drivers, Receivers, Transceivers Overview

The LTC1485IN8#PBF is a low-power differential bus transceiver designed for multipoint data transmission in RS-485 applications, with extended common-mode range from -7V to +12V. It also meets RS-422 requirements. The device features three-state outputs and operates on a single 5V supply (4.75V to 5.25V). It includes thermal shutdown protection and fail-safe receiver inputs that guarantee a high output state when inputs are left open. The component is housed in an 8-lead plastic DIP package and supports an operating temperature range of -40°C to +85°C.

Drivers, Receivers, Transceivers Feature Summary

• CMOS design with Schottky clamping provides significant 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.
• Receiver incorporates a fail-safe feature that guarantees a high output state when inputs are left open.

Drivers, Receivers, Transceivers Applications

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

Drivers, Receivers, Transceivers Procurement Notes

Verify the ordering suffix #PBF indicates lead-free finish and RoHS compliance. Confirm the 'I' designation corresponds to the industrial temperature range (-40°C to +85°C) and the N8 suffix specifies the 8-lead plastic DIP package. Ensure the manufacturer is Analog Devices Inc. or its predecessor Linear Technology Corporation.

Drivers, Receivers, Transceivers Selection Notes

Select this component for half-duplex RS-485/RS-422 networks requiring low power consumption and extended common-mode voltage tolerance. It is suitable for environments with potential ground differences up to ±7V between devices. Consider the pin-compatible alternatives SN75176A or DS75176A if legacy compatibility is required.

Drivers, Receivers, Transceivers Part Context

The LTC1485 series includes variants such as the CN8 (commercial temp), CS8 (commercial SOIC), and IS8 (industrial SOIC). The IN8 variant specifically denotes the industrial temperature grade within the narrow 8-lead PDIP package format.

Drivers, Receivers, Transceivers Replacement Considerations

Pin-compatible substitutes include SN75176A, DS75176A, and SN75LBC176. Verify electrical specifications match the application requirements before substitution.

Drivers, Receivers, Transceivers FAQ

What is the fail-safe feature of the LTC1485 receiver?

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

How does the LTC1485 protect against excessive power dissipation?

It includes a thermal shutdown circuit that forces the driver outputs into a high impedance state if the internal temperature reaches 150°C.

What is the common-mode range of the LTC1485?

The device supports an extended common-mode range from -7V to +12V.