MAX1487C/D

Drivers, Receivers, Transceivers Overview

The MAX1487C/D is a low-power, half-duplex RS-485/RS-422 transceiver containing one driver and one receiver. It supports data rates up to 2.5Mbps with unrestricted slew rates. The device operates from a single 5V supply (4.75V to 5.25V) and draws between 120µA and 500µA in active mode. It features quarter-unit-load receiver input impedance, allowing up to 128 transceivers on the bus. The C/D suffix indicates an operating temperature range of 0°C to +70°C.

Drivers, Receivers, Transceivers Feature Summary

• Quarter-unit-load receiver input impedance enables connection of up to 128 transceivers on the bus.
• Driver outputs are protected by short-circuit current limiting and thermal shutdown circuitry.
• Receiver inputs include fail-safe functionality that guarantees a logic-high output if the input is open circuit.

Drivers, Receivers, Transceivers Applications

• Low-Power RS-485 Transceivers
• Low-Power RS-422 Transceivers
• Industrial-Control Local Area Networks

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package variant required for the design, such as SOIC or Plastic DIP, as these are listed under the MAX1487C/D designation. Confirm that the commercial temperature range of 0°C to +70°C meets the operational requirements of the target environment before finalizing procurement specifications.

Drivers, Receivers, Transceivers Selection Notes

Select the MAX1487C/D when high node density is required due to its 1/4 unit load impedance. Ensure the application does not require a shutdown mode, as this feature is exclusive to the MAX481, MAX483, and MAX487 variants within this family. Verify that the 2.5Mbps data rate aligns with system timing constraints.

Drivers, Receivers, Transceivers Part Context

The MAX1487 belongs to the Maxim Integrated MAX48x/MAX1487 family of low-power transceivers designed for RS-485 and RS-422 communication. Unlike slew-rate-limited versions like the MAX487, the MAX1487 allows higher speed transmission up to 2.5Mbps. It shares pin compatibility with other devices in the series but differs in electrical characteristics regarding drive strength and power management.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX487 offers similar quarter-unit-load capability but is limited to 250kbps and includes a shutdown mode. The MAX481 provides comparable 2.5Mbps performance but has a standard 1-unit load impedance, restricting bus capacity to 32 nodes.