MAX3082CPA+

Overview

The MAX3082CPA+ is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc. (Maxim Integrated). It operates on a single +5V supply and features fail-safe circuitry that guarantees a logic-high receiver output when inputs are open or shorted. The device incorporates reduced slew-rate drivers to minimize electromagnetic interference (EMI) and reflections, supporting error-free data transmission up to 115kbps. It includes one driver and one receiver with a 1/8-unit-load input impedance, allowing up to 256 transceivers on the bus. The component is housed in an 8-pin PDIP package and operates within a temperature range of 0°C to +70°C.

Feature Summary

• Fail-safe circuitry ensures a logic-high receiver output during input faults or disabled transmitter states.
• Reduced slew-rate drivers minimize electromagnetic interference and signal reflections for reliable communication.
• Half-duplex operation supports up to 256 transceivers on a single bus line due to low input impedance.

Applications

• RS-422/RS-485 communications
• Level translators
• Transceivers for EMI-sensitive applications
• Industrial-control local area networks

Procurement Notes

Verify the specific suffix 'CPA+' against official documentation to confirm the plastic DIP packaging and commercial temperature range. Ensure compatibility with existing board layouts requiring through-hole mounting. Confirm that the 115kbps slew-rate limitation aligns with system timing requirements before finalizing procurement.

Selection Notes

Select this component for half-duplex RS-485 or RS-422 systems where minimizing EMI is critical. It is suitable for environments requiring fail-safe behavior during bus idle or fault conditions. Consider alternative models like the MAX3085 or MAX3088 if higher data rates or extended temperature ranges are required.

Part Context

The MAX3082 belongs to the MAX3080–MAX3089 family of high-speed transceivers designed for RS-485/RS-422 communication. This series offers various configurations including full-duplex options and selectable slew rates. The MAX3082 specifically targets applications needing moderate speed with enhanced noise immunity and simplified interface control.

Replacement Considerations

The MAX3082 is pin-compatible with industry-standard devices such as the 75176. Verify functional equivalence regarding slew rate limits and fail-safe thresholds when substituting with other half-duplex transceivers from the same family or competitors.