MAX3077EASA+T

Overview

The MAX3077EASA+T is a full-duplex RS-485 transceiver operating from a single +3.3V supply. It features one driver and one receiver with an uncontrolled slew rate, supporting data transmission up to 16Mbps. The device includes fail-safe circuitry that guarantees a logic-high receiver output when inputs are open or shorted. It provides ±15kV ESD protection on I/O pins and incorporates hot-swap capability to prevent false transitions during power-up or bus insertion. The component operates within a temperature range of -40°C to +125°C and draws 800μA of supply current.

Feature Summary

• Full-duplex communication architecture for simultaneous bidirectional data transfer
• Hot-swap input structure prevents erroneous data transitions during live bus insertion
• Fail-safe receiver design ensures a defined high state under open or shorted input conditions
• Robust ±15kV human body model ESD protection on all signal pins

Applications

• Industrial control systems requiring reliable serial communication
• Telecommunications equipment utilizing RS-485 networks
• Security systems with multiple node connectivity
• Instrumentation devices in electrically noisy environments

Procurement Notes

Verify the specific suffix 'A' confirms the extended industrial temperature range of -40°C to +125°C, as opposed to the commercial grade. Confirm the '+T' designation indicates tape-and-reel packaging rather than tube. Cross-reference the manufacturer's latest datasheet revision to ensure pinout compatibility and electrical specifications remain unchanged before finalizing procurement orders.

Selection Notes

Select this component specifically for applications requiring full-duplex operation at speeds up to 16Mbps. Unlike other variants in the family, the MAX3077 lacks a slew-rate limiter, making it suitable for shorter cable runs where electromagnetic interference is less critical. Ensure the system design accommodates the lack of shutdown mode, as this variant does not support low-power standby currents.

Part Context

This part belongs to the MAX3070E–MAX3079E series of +3.3V RS-485 transceivers manufactured by Analog Devices (Maxim Integrated). Within this family, the MAX3077 is distinguished by its full-duplex configuration and unrestricted driver slew rate. It shares common package options and protection features with siblings like the MAX3070 and MAX3076 but offers higher speed capabilities compared to the slew-rate-limited models.

Replacement Considerations

The MAX3070EESA+T serves as a direct functional substitute if lower data rates are acceptable. For half-duplex requirements, the MAX3072EESA+T may be considered, though pinouts differ. Verify that any replacement maintains the required +3.3V supply voltage and thermal characteristics.