MAX3157EPI

Overview

The MAX3157EPI is a full-duplex RS-422 and RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It provides high common-mode rejection ratio (CMRR) and ±50V isolation in a hybrid microcircuit architecture. The device operates on a single +5V logic supply, utilizing external capacitors to transfer power across the isolation barrier. It features a data rate of 250kbps and a receiver hysteresis of 25mV. The component is housed in a 28-pin PDIP package with an operating temperature range of 0°C to 70°C and a supply voltage range of 4.75V to 5.25V.

Feature Summary

• Provides galvanic isolation for RS-422 and RS-485 communication interfaces
• Operates from a single +5V logic-side power supply
• Ensures high common-mode rejection ratio for noise immunity

Applications

• Industrial control systems requiring isolated serial communication
• Building automation networks using RS-485 protocols
• Data acquisition systems with ground potential differences

Procurement Notes

Verify the specific suffix EPI against official datasheets to confirm the 28-PDIP package and commercial temperature grade. Confirm RoHS compliance status as indicated in manufacturer documentation. Check for obsolescence notices or end-of-life declarations prior to procurement planning.

Selection Notes

Select this component when isolated RS-422/RS-485 connectivity is required within a DIP form factor. Ensure the design accommodates the external capacitor requirements for power transfer across the isolation barrier. Verify that the 250kbps data rate meets system timing constraints.

Part Context

This part belongs to the MAX3157 family of isolated transceivers. It shares functional similarities with other variants like the MAX3157EAI, differing primarily in package type and temperature rating. The series is designed for robust industrial communication environments.

Replacement Considerations

Consult official substitution guides for pin-compatible alternatives. Verify electrical parameters such as isolation voltage and data rate match the original design requirements before considering any cross-reference parts.