LTC485MJ8

Drivers, Receivers, Transceivers Overview

The LTC485MJ8 is an obsolete low-power RS-485 and RS-422 differential bus transceiver manufactured by Analog Devices Inc. It operates on a single 5V supply (4.75V to 5.25V) with a typical supply current of 300μA when enabled and 500μA at no load. The device supports data rates up to 2.5Mb/s, featuring driver propagation delays of 30ns typical and receiver delays of 90ns typical. It provides a wide common-mode range from -7V to +12V, allowing for ±7V ground differences between devices. Key electrical characteristics include thermal shutdown protection, glitch-free power-up/down outputs, and a fail-safe receiver that guarantees a high output state when inputs are open.

Drivers, Receivers, Transceivers Feature Summary

• Low power CMOS design significantly reduces consumption compared to bipolar counterparts while maintaining ruggedness against overload and ESD damage.
• Driver and receiver feature three-state outputs; the driver maintains high impedance over the entire common mode range.
• Thermal shutdown circuit prevents excessive power dissipation caused by bus contention or faults by forcing driver outputs into a high impedance state.
• Fail-safe receiver guarantees a high output state when the inputs are left open.

Drivers, Receivers, Transceivers Applications

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

Drivers, Receivers, Transceivers Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels due to the obsolete status of the J8 package. Confirm lead finish specifications and temperature grade markings on shipping containers. Check for available replacement options within the same family if long-term availability is required.

Drivers, Receivers, Transceivers Selection Notes

Select this component only for legacy systems requiring the specific M-grade extended industrial temperature range (-55°C to 125°C). Ensure compatibility with the 8-lead ceramic DIP (J8) package footprint. Consider newer pin-compatible alternatives like the LTC2862 series if wider operating ranges or updated packaging are needed.

Drivers, Receivers, Transceivers Part Context

The LTC485MJ8 belongs to the LTC485 family of low-power RS-485/RS-422 transceivers. It is specifically designated as an obsolete package variant using the J8 8-lead ceramic DIP housing. This part was designed for applications requiring robust performance in harsh environments with extended temperature capabilities beyond commercial and industrial grades.

Drivers, Receivers, Transceivers Replacement Considerations

Consult Linear Technology marketing for parts specified with wider operating temperature ranges. Pin-compatible alternatives include the LTC2862 series which offers ±60V protection and similar functionality in updated packages.