AM685/BEA

Overview

The AM685/BEA is a general-purpose voltage comparator manufactured by Advanced Micro Devices. It features an open-emitter output configuration and operates within the ECL logic family. The device is housed in a 16-CDIP package with through-hole mounting. Key electrical specifications include a maximum offset voltage of 3000 µV and a response time of 12 ns. It supports a wide operating temperature range from -55°C to 125°C.

Feature Summary

• Open-emitter output configuration for flexible interfacing
• ECL logic family compatibility
• Wide industrial temperature operation capability

Applications

• High-speed signal processing circuits
• Precision voltage monitoring systems
• ECL-based digital logic interfaces

Procurement Notes

Verify the manufacturer designation as Advanced Micro Devices, noting that some distributor listings may incorrectly reference other entities. Confirm the specific suffix BEA corresponds to the CDIP package and temperature range. Ensure the component matches the 16-pin dual in-line ceramic package specification rather than alternative packaging types.

Selection Notes

Select this component when ECL compatibility and low offset voltage are required. The open-emitter output necessitates appropriate pull-up circuitry design. Consider the 12 ns response time for high-speed applications. Verify thermal requirements against the -55°C to 125°C operational range for environmental suitability.

Part Context

This part belongs to the AM685 series of comparators. It is distinct from the AM685DL variant, which is specified as ultra-fast. The BEA suffix typically denotes the specific package type and temperature grade within the Advanced Micro Devices product line.

Replacement Considerations

Cross-reference with AM686/BEA for similar comparator functions. Verify pinout and electrical characteristics against the original datasheet before substitution.