MAX1482EPD+

Drivers, Receivers, Transceivers Overview

The MAX1482EPD+ is a low-power RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply and supports data rates up to 250kbps. The device features slew-rate-limited drivers to minimize EMI and reduce reflections. It draws only 20µA of operating current and enters a shutdown mode consuming 0.1µA. The receiver input has a fail-safe feature guaranteeing a logic-high output if the input is open circuit. It allows up to 256 transceivers on the bus due to its 1/8-unit-load input impedance. The component is housed in a 14-pin PDIP package and operates within a temperature range of -40°C to +85°C.

Drivers, Receivers, Transceivers Feature Summary

• Slew-rate limited drivers minimize electromagnetic interference (EMI) and reduce signal reflections caused by improperly terminated cables.
• Low power consumption with 20µA operating current and a 0.1µA shutdown mode for energy efficiency.
• Fail-safe receiver input guarantees a logic-high output when the input pins are left open or disconnected.
• Integrated thermal shutdown and short-circuit current limiting protect the driver outputs from overload conditions.

Drivers, Receivers, Transceivers Applications

• Low-Power RS-485/RS-422 Networks
• Transceivers for EMI-Sensitive Applications
• Industrial-Control Local Area Networks
• Large 256-Node LANs

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against official documentation to confirm the industrial temperature grade (-40°C to +85°C) and the 14-pin PDIP package type. Ensure compatibility with single +5V supply requirements and check for any obsolete status updates directly from the manufacturer before procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring full-duplex RS-485 communication with strict power constraints. The 1/8-unit-load specification enables high node density, supporting up to 256 devices on a single bus. Consider the slew-rate limitation for environments where minimizing EMI is critical compared to standard RS-485 transceivers.

Drivers, Receivers, Transceivers Part Context

The MAX1482EPD+ belongs to the MAX1482/MAX1483 family of low-power transceivers designed for RS-485 and RS-422 communications. While the MAX1482 provides full-duplex operation, the MAX1483 variant offers half-duplex functionality. Both share identical electrical characteristics regarding power consumption, data rates, and protection features.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX1482CPD serves as a commercial-grade alternative with a 0°C to +70°C temperature range. For half-duplex applications, the MAX1483 series offers equivalent performance. Verify pinout compatibility and ensure the replacement meets the specific environmental and electrical requirements of the design.

Drivers, Receivers, Transceivers FAQ

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

The MAX1482EPD+ features a 1/8-unit-load input impedance, which guarantees support for up to 256 transceivers on a single bus.

How does the device handle an open receiver input?

The receiver includes a fail-safe feature that guarantees a logic-high output state if the A and B input pins are left open or disconnected.

What protection mechanisms are included for the driver outputs?

The drivers are protected by short-circuit current limiting and thermal shutdown circuitry, which forces outputs to a high-impedance state if excessive power dissipation occurs.