LTC490CS8#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC490CS8#TRPBF is a low-power differential bus transceiver designed for RS485 and RS422 applications. It operates on a single 5V supply (4.75V to 5.25V) with a typical supply current of 300mA. The device features an extended common mode range from –7V to 12V, allowing for ground differences between devices. Key electrical parameters include a typical driver propagation delay of 28ns with 5ns skew, supporting data rates up to 2.5MBps. The receiver provides a fail-safe feature with 70mV typical input hysteresis. The component is housed in an 8-lead SOIC package.

Drivers, Receivers, Transceivers Feature Summary

• Thermal shutdown protection prevents damage from excessive power dissipation by forcing driver outputs to a high impedance state.
• Glitch-free driver outputs during power-up and power-down events permit live insertion or removal without data corruption.
• Fail-safe receiver guarantees a high output state when inputs are left open, ensuring defined logic levels.

Drivers, Receivers, Transceivers Applications

• Multipoint data transmission systems adhering to RS485 standards
• Full-duplex communication links utilizing RS422 protocols
• Industrial line repeater circuits for extending cable length beyond standard limits

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape-and-reel packaging upon purchase. Confirm that the CS8 designation corresponds to the commercial temperature range (0°C to 70°C). Ensure the supplier source is authorized to guarantee component authenticity and traceability.

Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring pin compatibility with SN75179 equivalents while needing lower power consumption than bipolar counterparts. Consider the 2.5MB maximum data rate and 32-transceiver bus limit when designing network topology. Evaluate thermal management requirements if short-circuit conditions are probable.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC490 family of differential drivers and receivers manufactured by Analog Devices Inc. It serves as a robust interface solution for noisy industrial environments. The series includes variants like the LTC491 which adds a shutdown control pin for multi-drop bus management.

Drivers, Receivers, Transceivers Replacement Considerations

The datasheet explicitly states the device is pin compatible with the SN75179. For higher speed requirements, consider the LTC1686/LTC1687 which are also noted as LTC490/LTC491 pin compatible but offer 52Mbps operation.