MAX3469CSA+

Drivers, Receivers, Transceivers Overview

The MAX3469CSA+ is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply and supports data rates up to 40Mbps with propagation delays under 20ns. The device features true fail-safe circuitry, ensuring a logic-high receiver output when inputs are open or shorted. It includes thermal shutdown and current limiting for driver protection. The component is housed in an 8-pin SOIC package and operates within a temperature range of 0°C to +70°C.

Drivers, Receivers, Transceivers Feature Summary

• True fail-safe receiver guarantees a logic-high output when differential inputs are open or shorted.
• Hot-swap capability prevents bus disturbances during board insertion into powered backplanes.
• 1/4-unit-load receiver input impedance allows connection of up to 128 transceivers on the bus.

Drivers, Receivers, Transceivers Applications

• High-speed RS-485 communications
• High-speed RS-422 communications
• Profibus applications

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'CSA+' against the manufacturer's ordering guide to confirm the lead-free/RoHS-compliant status and the industrial commercial temperature range. Ensure the selected package matches the required PCB footprint for the 8-pin SOIC configuration.

Drivers, Receivers, Transceivers Selection Notes

Select this part for half-duplex multipoint transmission systems requiring high noise immunity and hot-swap tolerance. Verify that the system voltage requirements align with the specified +5V supply range and that the communication protocol meets the Profibus or EIA/TIA standards supported by the device.

Drivers, Receivers, Transceivers Part Context

This component belongs to the MAX3465–MAX3469 family of high-speed differential bus transceivers designed for RS-485 and RS-422 communications. The MAX3469 specifically provides half-duplex functionality, distinguishing it from the full-duplex variants within the same series.

Drivers, Receivers, Transceivers Replacement Considerations

Compatible substitutes include other MAX3469 variants such as MAX3469EPA for through-hole mounting or MAX3469ESA for extended temperature ranges. Cross-referencing pinouts and electrical characteristics is necessary when replacing with non-family components.

Drivers, Receivers, Transceivers FAQ

How does the MAX3469 handle bus contention?

The device employs foldback current limiting and thermal-shutdown circuitry to protect the driver outputs from excessive power dissipation and short circuits.

What is the purpose of the fail-safe feature?

The true fail-safe circuitry ensures that the receiver output remains at a logic-high state if the receiver inputs are left open or shorted, preventing undefined states on the bus.