MAX3081CPA+

Overview

The MAX3081CPA+ is a full-duplex RS-422/RS-485 transceiver in an 8-pin PDIP package. It features fail-safe circuitry and reduced slew-rate drivers for error-free data transmission up to 115kbps. The device operates on a single +5V supply (4.75V to 5.25V) with a typical quiescent current of 375µA. It includes one driver and one receiver, supporting up to 256 units on the bus due to its 1/8-unit-load input impedance.

Feature Summary

• Fail-safe design guarantees a logic-high receiver output when inputs are open or shorted
• Slew-rate-limited drivers minimize electromagnetic interference and signal reflections
• High noise immunity through differential receiver thresholds compliant with EIA/TIA-485 standards

Applications

• RS-422 and RS-485 communication networks
• Industrial control local area networks
• EMI-sensitive applications requiring controlled signal rise times

Procurement Notes

Verify the specific suffix 'CPA+' against official Analog Devices documentation to confirm the plastic DIP package and commercial temperature range. Ensure compatibility with existing PCB footprints and thermal requirements before finalizing procurement decisions.

Selection Notes

Select this component for full-duplex applications requiring robust fail-safe behavior and low electromagnetic emissions. It is suitable for systems operating at data rates up to 115kbps where standard slew rates might cause signal integrity issues on unterminated lines.

Part Context

This part belongs to the MAX3080–MAX3089 family of high-speed transceivers designed for RS-485/RS-422 communication. The MAX3081 specifically provides full-duplex operation with fixed 115kbps slew-rate limiting, distinguishing it from higher-speed variants like the MAX3087.

Replacement Considerations

The MAX3081 is pin-compatible with industry-standard 75179 devices. Verify that any replacement maintains the same full-duplex configuration and 115kbps slew-rate limitation to ensure functional equivalence in existing designs.