MAX3292EPD

Overview

The MAX3292EPD is a full-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated in a 14-pin Plastic DIP package. It operates from a single +5V supply and features driver preemphasis circuitry to reduce intersymbol interference for high-speed, long-distance communication. The device supports data rates up to 10Mbps, with the preemphasis interval programmable via an external resistor connected to the PSET pin. It includes a low-current shutdown mode reducing supply current to 100nA, a fail-safe receiver input, and allows up to 128 transceivers on the bus due to its 1/4-unit-load receiver impedance.

Feature Summary

• Driver preemphasis circuitry extends reliable communication distance and increases data rate by reducing intersymbol interference caused by long cables.
• Programmable preemphasis interval using a single external resistor provides flexibility for various baud rates up to 10Mbps.
• Fail-safe receiver input guarantees a logic-high output if the differential input pins are left open-circuit.
• Low-current shutdown mode significantly reduces power consumption when the device is not actively transmitting or receiving.

Applications

• Long-Distance, High-Speed RS-485/RS-422 Communications
• Telecommunications Systems
• Industrial-Control Local Area Networks

Procurement Notes

Verify the specific ordering suffix EPD confirms the -40°C to +85°C temperature range and 14-Pin Plastic DIP package configuration. Ensure compatibility with existing board layouts designed for '75180, MAX489, MAX491, MAX3080, MAX3083, MAX3086, or MAX1482 pinouts. Confirm that the application circuit includes the necessary external resistor for the PSET pin to set the desired preemphasis interval.

Selection Notes

Select the MAX3292EPD over the MAX3291 when a programmable preemphasis interval is required rather than a fixed 100ns duration. This component is suitable for designs needing pin-compatibility with legacy RS-485 drivers while requiring extended cable lengths or higher data rates. Ensure the system power supply can support the peak currents during preemphasis transitions and that the PCB layout accommodates the 14-pin DIP footprint.

Part Context

The MAX3292EPD belongs to the MAX3291/MAX3292 family of high-speed RS-485/RS-422 transceivers. Unlike the MAX3291 which has a fixed preemphasis interval, the MAX3292 allows customization of this parameter via an external resistor. Both devices share identical pinouts and core functionalities, including full-duplex operation and low-power shutdown modes, making them interchangeable in terms of physical integration but distinct in timing configuration.

Replacement Considerations

Public confirmed substitutes include MAX3291CSD, MAX3291CPD, MAX3291ESD, MAX3291EPD, MAX3292CSD, MAX3292CPD, and MAX3292ESD. These parts are pin-compatible with '75180, MAX489, MAX491, MAX3080, MAX3083, MAX3086, and MAX1482.