MAX22508EASA+

Overview

The MAX22508EASA+ is an RS-485/RS-422 full-duplex transceiver manufactured by Analog Devices Inc. under the Maxim Integrated brand, housed in an 8-pin SOIC package. It supports data rates up to 50Mbps with a supply voltage range of 3V to 5.5V and operates within a temperature range of -40°C to +125°C. The device features integrated ESD protection rated at ±15kV (HBM), ±7kV air-gap, and ±6kV contact discharge per IEC 61000-4-2. Electrical characteristics include a typical driver propagation delay of 32ns, receiver propagation delay of 40ns, and a shutdown current of 4mA.

Feature Summary

• Integrated hot-swap protection prevents false transitions during power-up or board insertion.
• Fail-safe receiver guarantees a logic-high output when inputs are shorted or open for longer than 10μs.
• High common-mode range from -15V to +15V ensures robust communication in harsh industrial environments.
• Symmetrical receiver thresholds minimize duty-cycle distortion on recovered data signals.

Applications

• Motion Control
• Encoder Interfaces
• Field Bus Networks
• Industrial Control Systems
• Backplane Busses

Procurement Notes

Verify the component against official datasheets to confirm pinout compatibility and electrical specifications before integration. Ensure that the 8-pin SOIC footprint matches the PCB layout requirements. Confirm RoHS compliance status through manufacturer documentation. Validate thermal resistance parameters against system cooling capabilities.

Selection Notes

Select this component for applications requiring high-speed full-duplex communication over long distances. It is suitable for systems needing strong ESD immunity and fail-safe operation without external components. Consider the 8-pin SOIC package size constraints. Evaluate the 50Mbps data rate capability against network timing requirements.

Part Context

This part belongs to the MAX22507E/MAX22508E series of high-speed RS-485/RS-422 transceivers. The MAX22508E specifically utilizes an 8-pin SOIC package, whereas its counterpart, the MAX22507E, uses a 10-pin μMAX package. Both share identical electrical performance but differ in physical form factor and pin count.

Replacement Considerations

The MAX22507EAUB+ serves as a functional equivalent within the same family, offering identical electrical characteristics but packaged in a 10-pin μMAX format instead of the 8-pin SOIC. Verify pin-to-pin compatibility if substituting into existing layouts designed for the SOIC variant.