LTC1690IS8#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC1690IS8#TRPBF is a low-power differential driver and receiver pair compatible with RS485 and RS422 standards, manufactured by Analog Devices Inc. in an 8-lead plastic SO package. It operates on a single 5V supply with a maximum supply current of 600mA under no-load conditions. The device supports data rates up to 5Mbps and features a fail-safe receiver that guarantees a high output state when inputs are open or shorted. It includes thermal shutdown protection for the driver outputs and withstands –7V to 12V common mode voltages.

Drivers, Receivers, Transceivers Feature Summary

• Fail-safe receiver design ensures a guaranteed high logic state when inputs are floating, shorted together, or terminated without a signal present.
• Integrated thermal shutdown circuit protects against excessive power dissipation by forcing driver outputs into a high impedance state during faults.
• Robust ESD protection meets –15kV Human Body Model and IEC1000-4-2 Level 4 contact specifications without external suppressors.
• Glitch-free power-up and power-down driver outputs permit live insertion or removal of the transceiver from the bus.

Drivers, Receivers, Transceivers Applications

• Battery-powered RS485/RS422 communication systems
• Low power RS485/RS422 transceivers
• Level translators
• Line repeaters

Drivers, Receivers, Transceivers Procurement Notes

Verify the component matches the specific industrial temperature range (–40°C to 85°C) indicated by the 'I' suffix. Confirm the package type corresponds to the 8-lead plastic Small Outline (SOIC). Ensure the ordering suffix '#TRPBF' aligns with tape and reel packaging requirements and lead-free manufacturing specifications.

Drivers, Receivers, Transceivers Selection Notes

Select this part for applications requiring full-duplex operation with separate driver and receiver pins. It is suitable for driving low-cost residential telephone wires and twisted pair cables. Consider the 5V supply requirement and ensure the load does not exceed the specified short-circuit current limits to avoid triggering thermal shutdown.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC1690 family of differential drivers and receivers. It is pin-compatible with the SN75179 and LTC490, facilitating direct replacements in existing designs. The device is designed for commercial and industrial environments, offering robust fault protection and reliable performance over a wide common mode voltage range.

Drivers, Receivers, Transceivers Replacement Considerations

Pin-compatible substitutes include the SN75179 and LTC490. Verify that alternative components support the same 5V supply voltage and meet the required fail-safe and ESD protection specifications for the target application.

Drivers, Receivers, Transceivers FAQ

How does the fail-safe feature function?

The receiver guarantees a high output state when the inputs are left open, shorted together, or terminated with no signal present, achieved through internal trip-point design without external components.

What happens during a driver output short circuit?

The short-circuit current is limited to a maximum of 250mA. If the die temperature exceeds 150°C, the thermal shutdown circuit forces the outputs into a high impedance state until the temperature drops to approximately 130°C.

Can the device be used for live insertion?

Yes, the driver maintains glitch-free outputs during power-up and power-down, permitting the live insertion or removal of the transceiver onto the bus.