MAX3084CPA+

Overview

The MAX3084CPA+ is a full-duplex RS-422/RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V supply (4.75V to 5.25V) and supports data rates up to 500kbps with slew-rate-limited drivers. The device features fail-safe circuitry that guarantees a logic-high receiver output when inputs are open or shorted. It includes one driver and one receiver, drawing a typical quiescent current of 375µA. Packaged in an 8-pin PDIP, it operates within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Fail-safe receiver circuitry ensures a logic-high output state during bus idle conditions or input faults.
• Slew-rate-limited driver outputs minimize electromagnetic interference and reduce signal reflections on improperly terminated cables.
• 1/8-unit-load receiver input impedance allows for high node density, supporting up to 256 transceivers on a single bus.

Applications

• RS-422 and RS-485 communication networks
• Industrial control local area networks
• Level translation applications

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature rating. Ensure compatibility with system voltage requirements and interface standards before integration. Cross-reference manufacturer part numbers to avoid counterfeit components.

Selection Notes

Select this component for full-duplex applications requiring moderate speed up to 500kbps. The slew-rate limitation makes it suitable for EMI-sensitive environments or long cable runs where reflection reduction is critical compared to higher-speed variants.

Part Context

This device belongs to the MAX3080–MAX3089 family of high-speed transceivers. It shares the same pinout as industry-standard parts like the 75179 but incorporates additional internal features such as enhanced fail-safe thresholds and low-power shutdown capabilities not present in legacy equivalents.

Replacement Considerations

The MAX3084CPA+ is pin-compatible with the 75179. Verify functional differences regarding shutdown modes and threshold voltages when substituting into existing designs.