MAX3292CSD+

Overview

The MAX3292CSD+ is a full-duplex RS-485/RS-422 transceiver featuring driver preemphasis circuitry to reduce intersymbol interference. It operates from a single +5V supply and supports data rates up to 10Mbps, programmable via an external resistor on the PSET pin. The device includes a low-current shutdown mode drawing 100nA, a fail-safe receiver input guaranteeing a logic-high output when open, and a 1/4-unit-load impedance allowing up to 128 transceivers on the bus. It is housed in a 14-pin SO package.

Feature Summary

• Driver preemphasis circuitry extends reliable communication distance and increases data rate by reducing intersymbol interference caused by long cables.
• Data rate is programmable up to 10Mbps using a single external resistor connected to the PSET pin.
• Fail-safe receiver input guarantees a logic-high output if the differential input is left open circuit.
• Low-current shutdown mode reduces supply current to 100nA for power conservation.

Applications

• Long-distance, high-speed RS-485/RS-422 communications
• Telecommunications systems
• Industrial-control local area networks

Procurement Notes

Verify the component matches the specific MAX3292 variant with programmable preemphasis settings rather than the fixed-rate MAX3291. Confirm the suffix indicates the C temperature range (0°C to +70°C) and the SD package type (14-SO). Ensure the source provides valid documentation confirming the part number authenticity before finalizing any acquisition steps.

Selection Notes

Select this model over the MAX3291 when flexible preemphasis timing is required for varying baud rates. The MAX3292 allows optimization of the preemphasis interval via an external resistor, whereas the MAX3291 has a fixed internal interval. This flexibility makes the MAX3292 suitable for applications where cable characteristics or data rates differ significantly from standard configurations.

Part Context

This component belongs to the MAX3291/MAX3292 family of high-speed RS-485/RS-422 transceivers designed for robust communication over long distances. The series addresses inter-symbol interference through preemphasis technology. The MAX3292 specifically offers adjustable preemphasis timing compared to the fixed-timing MAX3291, providing design engineers with greater adaptability for diverse transmission line environments.

Replacement Considerations

The MAX3291CSD+ is a pin-compatible alternative but features a fixed preemphasis interval optimized for 5Mbps to 10Mbps. Other compatible parts include the MAX489, MAX491, MAX3080, MAX3083, MAX3086, and MAX1482, though these lack the specific preemphasis functionality of the MAX3292.