LTC1690CN8#PBF

Drivers, Receivers, Transceivers Overview

The LTC1690CN8#PBF is a low-power differential driver and receiver pair compatible with RS-422 and RS-485 standards. It operates on a single 5V supply (4.75V to 5.25V) with a typical supply current of 260µA and a maximum of 600µA. The device supports data rates up to 5Mbps and features a fail-safe receiver that guarantees a high output state when inputs are open, shorted, or terminated without a signal. It includes thermal shutdown protection for the driver outputs and withstands –15kV ESD (Human Body Model). The component is housed in an 8-pin PDIP package and is specified for commercial temperature ranges from 0°C to 70°C.

Drivers, Receivers, Transceivers Feature Summary

• Fail-safe receiver output ensures a known high logic state during input floating, shorting, or termination absence.
• Thermal shutdown circuit protects against excessive power dissipation by forcing driver outputs to high impedance during faults.
• Robust ESD protection meets IEC1000-4-2 Level 4 contact and Level 3 air discharge specifications.

Drivers, Receivers, Transceivers Applications

• Battery-powered RS-485/RS-422 communication systems
• Low power RS-485/RS-422 transceivers
• Level translation between different voltage domains
• Line repeater applications

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix CN8 corresponds to the commercial temperature range (0°C to 70°C) and PDIP-8 package configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering part number matches the exact pinout and electrical specifications required for the target design.

Drivers, Receivers, Transceivers Selection Notes

Select this component for full-duplex applications requiring separate driver and receiver pins. It is suitable for driving low-cost residential telephone wires and twisted pair cables up to 1000 feet at lower data rates. Consider the commercial temperature range limits; use the IN8 variant if operation below 0°C is required. Verify bus capacitance and termination requirements to prevent receiver glitches.

Drivers, Receivers, Transceivers Part Context

This device belongs to the LTC1690 family of differential interface ICs designed for robust serial communication. It serves as a cost-effective solution for industrial and commercial data transmission where low power consumption and reliable fault protection are critical. The component is pin-compatible with legacy parts like the SN75179 and LTC490, facilitating direct upgrades in existing designs.

Drivers, Receivers, Transceivers Replacement Considerations

The LTC490 is a pin-compatible alternative within the same product family. For designs requiring shutdown capability, the LTC491 may be considered. Verify that any substitute maintains the –7V to 12V common mode range and fail-safe characteristics.