MAX1487CUA+

Drivers, Receivers, Transceivers Overview

The MAX1487CUA+ is a low-power, half-duplex RS-485/RS-422 transceiver featuring one driver and one receiver. It supports data rates up to 250kbps with slew-rate-limited drivers to minimize EMI. Operating from a single 5V supply (4.75V to 5.25V), it draws 120µA to 250µA in active mode and 0.1µA in shutdown. The device includes fail-safe receiver inputs, thermal shutdown, and short-circuit current limiting. Its 1/4-unit-load input impedance allows up to 128 transceivers on the bus. It operates within a commercial temperature range of 0°C to +70°C.

Drivers, Receivers, Transceivers Feature Summary

• Slew-rate-limited drivers reduce electromagnetic interference and signal reflections for reliable communication.
• Quarter-unit-load receiver input impedance enables high node density with up to 128 devices per bus.
• Integrated fail-safe mechanism ensures a logic-high output state when receiver inputs are open.
• Low-power shutdown mode significantly reduces supply current consumption during idle periods.

Drivers, Receivers, Transceivers Applications

• Industrial-control local area networks
• Low-power RS-485 transceiver systems
• EMI-sensitive application environments

Drivers, Receivers, Transceivers Procurement Notes

Verify the component matches the specific package type and temperature grade required for your design. Confirm that the ordering suffix corresponds to the desired RoHS compliance status and packaging format before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring reduced electromagnetic emissions due to its slew-rate-limited driver characteristics. Ensure the system operates within the specified 5V supply voltage range and verify that the 250kbps maximum data rate meets the network requirements.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487 family of low-power transceivers designed for RS-485 and RS-422 communications. It shares functional similarities with other members of the series but is distinguished by its specific slew-rate limitations and quarter-unit-load input impedance specifications.

Drivers, Receivers, Transceivers Replacement Considerations

Direct replacements include MAX487CSA and MAX487ESA for different package or temperature options. Other family members like MAX481 or MAX485 may serve as alternatives if slew-rate limiting is not required.

Drivers, Receivers, Transceivers FAQ

What is the maximum number of transceivers supported on the bus?

The MAX1487 features a 1/4-unit-load receiver input impedance, allowing up to 128 transceivers on a single bus.

How does the device handle an open receiver input?

The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit.

What protection mechanisms are included for the driver outputs?

Drivers are short-circuit current limited and protected against excessive power dissipation by thermal shutdown circuitry.