MAX22507EAUB+

Overview

The MAX22507EAUB+ is a full-duplex RS-485/RS-422 transceiver optimized for high-speed communication up to 50Mbps. It operates on a supply voltage range of 3V to 5.5V with a typical supply current of 4mA and a maximum shutdown current of 5μA. The device features integrated hot-swap protection, fail-safe receivers, and symmetrical receiver thresholds. It supports up to 200 transceivers on the bus and withstands over ±4kV EFT. The component is housed in a 10-pin μMAX package and operates within a temperature range of -40°C to +125°C.

Feature Summary

• Integrated hot-swap protection prevents false driver transitions during power-up or hot-plug events by holding enable inputs in defined states.
• Fail-safe receiver guarantees a logic-high output when differential input signals are shorted, open, or attenuated beyond specified thresholds.
• Symmetrical receiver thresholds eliminate duty-cycle distortion at high signal attenuation levels common in long cable runs.
• High electromagnetic interference immunity includes ±15kV ESD protection and robustness against electrical fast transients.

Applications

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

Procurement Notes

Verify the specific ordering suffix to confirm the package type and RoHS compliance status. The 'U' indicates the 10-pin μMAX package, while '+' denotes lead-free/RoHS compliance. Ensure the procurement channel sources directly from Analog Devices or authorized distributors to guarantee authenticity and traceability for industrial-grade components.

Selection Notes

Select this component for applications requiring simultaneous transmission and reception at speeds up to 50Mbps. The low shutdown current makes it suitable for power-sensitive systems. Verify that the system design accommodates the 10-pin μMAX footprint and that the operating environment falls within the specified -40°C to +125°C temperature range.

Part Context

This part belongs to the MAX22507E/MAX22508E series of high-speed RS-485/RS-422 transceivers. While the MAX22508E offers an 8-pin SOIC package without shutdown capabilities, the MAX22507E provides the additional low-power shutdown feature and utilizes a compact 10-pin μMAX package designed for space-constrained industrial designs.

Replacement Considerations

The MAX22507EAUB+T is the tape-and-reel variant of the same functional device. For pin-compatible alternatives with different packaging, consider the MAX22508E series, though it lacks the shutdown control feature and uses an 8-pin SOIC package instead of the 10-pin μMAX form factor.

FAQ

How does the fail-safe mechanism function?

The receiver guarantees a logic-high output on RO if the differential input voltage (VA - VB) remains between -50mV and +50mV for longer than 10μs, covering conditions where inputs are open, shorted, or terminated with all drivers disabled.

What is the purpose of the hot-swap protection?

Hot-swap protection holds the DE input low and RE input high for at least 10μs upon power-up or board insertion. This prevents unintended driver activation caused by voltage transients or leakage currents before the host processor initializes.

Can the driver outputs be used as single-ended outputs?

Yes, the driver outputs Y and Z can operate in standard differential mode or as individual rail-to-rail single-ended TTL or CMOS logic outputs.