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. The device includes a fail-safe receiver that guarantees a logic-high output when the input is open, and a 1/4-unit-load receiver impedance allows for up to 128 transceivers on the bus. It offers a low-current shutdown mode reducing supply current to 100nA. The component is housed in a 14-pin SO package and functions within an operating temperature range of 0°C to +70°C.

Feature Summary

• Driver preemphasis circuitry extends reliable communication distance and increases data rate by mitigating intersymbol interference caused by long cables.
• Fail-safe receiver input ensures a logic-high output state if the differential input terminals are left open-circuited.
• Low-current shutdown mode significantly reduces power consumption by lowering supply current to 100nA.

Applications

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

Procurement Notes

Verify the specific suffix 'CSD' corresponds to the commercial temperature grade (0°C to +70°C) and the 14-pin Small Outline package. Confirm the manufacturer designation as Analog Devices Inc./Maxim Integrated. Ensure the component meets RoHS requirements if applicable to the project specifications before finalizing procurement.

Selection Notes

Select the MAX3292CSD over the MAX3291 variant when programmable preemphasis timing is required via an external resistor. This model is suitable for applications needing full-duplex operation at speeds up to 10Mbps with a standard +5V supply. Consider the 1/4-unit-load receiver capability for high-node-count bus configurations.

Part Context

The MAX3292CSD belongs to the MAX3291/MAX3292 family of high-speed RS-485/RS-422 transceivers. It shares pin compatibility with legacy devices such as the SN75180, MAX489, MAX491, MAX3080, MAX3083, MAX3086, and MAX1482, facilitating direct upgrades in existing designs requiring enhanced transmission performance.

Replacement Considerations

Public confirmed substitutes include MAX3291CSD, MAX3086CSD, and MAX3491CSD-G002. Verify functional equivalence regarding preemphasis capabilities and voltage levels when replacing this component.

FAQ

How is the preemphasis interval configured on the MAX3292?

The preemphasis interval is set using an external resistor connected between the PSET and VCC pins. A capacitor should also be placed from PSET to VCC for bypassing.

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

The MAX3292 features a 1/4-unit-load receiver input impedance, allowing up to 128 transceivers to be connected on a single communication line.

How does the device enter low-power shutdown mode?

Shutdown is initiated by driving the Receiver Enable (RE) pin high and the Driver Enable (DE) pin low simultaneously.