MAX3070EAPD

Overview

The MAX3070EAPD is a +3.3V, full-duplex RS-422/RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features ±15kV ESD protection and fail-safe circuitry that guarantees a logic-high receiver output when inputs are open or shorted. The device supports data rates up to 250kbps with reduced slew-rate drivers to minimize EMI. It operates within a supply voltage range of 2.97V to 3.63V and draws 800μA of supply current when unloaded. The unit is housed in a 14-pin PDIP package and functions across an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated hot-swap capability eliminates false transitions on the bus during power-up or hot insertion events.
• Fail-safe receiver design ensures a defined high logic state if all transmitters are disabled or the bus is unterminated.
• Reduced driver slew rates minimize electromagnetic interference and signal reflections caused by improperly terminated cables.

Applications

• Industrial control systems requiring robust RS-485 communication
• Building automation networks utilizing half-duplex or full-duplex topologies
• Process control instrumentation with long-distance serial data transmission needs

Procurement Notes

Verify component authenticity through authorized distributors due to potential counterfeit risks. Confirm RoHS compliance status for environmental regulations. Check for specific ordering suffixes that may indicate tape-and-reel packaging versus tube quantities. Ensure the supplier provides valid traceability documentation for critical industrial applications.

Selection Notes

Select this component for applications requiring full-duplex operation at speeds up to 250kbps. It is suitable for environments where ESD protection and fail-safe behavior are critical. Compare against higher-speed variants like the MAX3076 series if data rates exceeding 500kbps are required. Ensure the system voltage aligns with the specified 3.3V nominal supply range.

Part Context

This part belongs to the MAX3070E–MAX3079E family of low-power, +3.3V transceivers. The family differentiates models based on duplex mode, slew rate limitations, and ESD protection levels. The MAX3070 specifically targets full-duplex applications with controlled edge rates for noise reduction in noisy industrial environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with direct pin-to-pin replacements from the same MAX307x family, such as the MAX3071EAPD, ensuring functional differences like slew rate settings do not impact system performance.