LTC1485IS8#PBF

Drivers, Receivers, Transceivers Overview

The LTC1485IS8#PBF is a low power differential bus transceiver designed for multipoint data transmission standard RS485 applications with extended common-mode range (12V to –7V). It also meets the requirements of RS422. The CMOS with Schottky design offers significant power savings over its bipolar counterpart without sacrificing ruggedness against overload or ESD damage. The driver and receiver feature three-state outputs, with the driver outputs maintaining high impedance over the entire common-mode range. Excessive power dissipation caused by bus contention or faults is prevented by a thermal shutdown circuit which forces the driver outputs into a high impedance state. I/O pins are protected against multiple ESD strikes of over ±10kV.

Drivers, Receivers, Transceivers Feature Summary

• Low power consumption with typical supply current of 1.8mA
• ESD protection exceeding ±10kV on I/O pins
• Thermal shutdown protection prevents excessive power dissipation during faults
• Fail-safe receiver guarantees high output when inputs are left open

Drivers, Receivers, Transceivers Applications

• Multipoint data transmission using RS485 standard
• RS422 compliant communication systems
• Level translation between different voltage domains

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and RoHS compliance. Confirm the IS8 variant corresponds to the industrial temperature range (-40°C to +85°C) and SOIC-8 package. Cross-reference the manufacturer part number with official Analog Devices documentation to ensure authenticity and correct revision level before procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring low power operation in RS485/RS425 networks. Ensure the system operates within the 4.75V to 5.25V supply voltage range. Consider the -40°C to +85°C operating temperature range suitable for industrial environments. Verify that the extended common-mode range of -7V to 12V accommodates potential ground differences up to ±7V between devices on the bus.

Drivers, Receivers, Transceivers Part Context

The LTC1485 series includes variants like LTC1485CN8 and LTC1485CS8 for commercial temperature ranges. The IS8 suffix specifically denotes the industrial grade (-40°C to +85°C) in an 8-lead plastic SOIC package. It is pin-compatible with SN75176A, DS75176A, and SN75LBC176, facilitating direct replacements in existing designs.

Drivers, Receivers, Transceivers Replacement Considerations

Pin-compatible replacements include SN75176A, DS75176A, and SN75LBC176. Verify electrical specifications such as supply current and propagation delay match application requirements when substituting.