MAX3071EEPA+

Overview

The MAX3071EEPA+ is a +3.3V, full-duplex RS-485 transceiver featuring ±15kV ESD protection and fail-safe circuitry. It operates within a supply voltage range of 3.135V to 3.465V and supports data rates up to 250kbps with enhanced slew-rate limiting. The device draws 800µA typical supply current and includes hot-swap capability on the DE and RE pins. It guarantees a logic-high receiver output when inputs are open or shorted. Operating temperatures range from -40°C to +85°C, housed in an 8-pin PDIP package.

Feature Summary

• Integrated fail-safe receiver ensures a logic-high output during bus idle or fault conditions while maintaining EIA/TIA-485 compatibility.
• Hot-swap input structure on DE and RE pins prevents false transitions and erroneous data transfer during board insertion into powered backplanes.
• Enhanced slew-rate limiting minimizes electromagnetic interference (EMI) and reduces signal reflections caused by improperly terminated cables.

Applications

• Industrial control systems
• Telecommunications equipment
• Security and alarm systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific 'E' suffix indicates the extended temperature range (-40°C to +85°C). Ensure the 'PA+' designation corresponds to the plastic DIP package and lead-free compliance status required for the target assembly process.

Selection Notes

Select this model for applications requiring full-duplex communication at speeds up to 250kbps. Unlike other variants in the series, the MAX3071E lacks a shutdown mode, making it suitable for designs where continuous operation is preferred over power saving. Verify that the 3.3V supply rail stability meets the specified operating requirements.

Part Context

This component belongs to the MAX3070E–MAX3079E family of high-speed RS-485 transceivers manufactured by Analog Devices/Maxim Integrated. The family shares common features like ESD protection and fail-safe design but varies in duplex mode, data rate capabilities, and power management options.

Replacement Considerations

Direct functional replacements within the same family include the MAX3070EEPA+ and MAX3072EEPA+. Note that these alternatives may differ in duplex configuration or power consumption characteristics compared to the MAX3071E.

FAQ

Does the MAX3071EEPA+ support a low-power shutdown mode?

No, the MAX3071E does not feature a shutdown mode. Other devices in the MAX3070E–MAX3079E family, such as the MAX3070E, offer a shutdown current of 10µA, but the MAX3071E is designed for continuous operation.

What is the maximum data rate supported by this transceiver?

The MAX3071EEPA+ supports a maximum data rate of 250kbps due to its enhanced slew-rate limiting, which helps minimize EMI and reflections.

How does the fail-safe feature operate in this device?

The fail-safe circuitry guarantees a logic-high receiver output if the receiver inputs are open, shorted, or connected to a terminated line with all drivers disabled. This occurs because the differential input threshold is set between -50mV and -200mV.