933FM/B

Overview

The 933FM/B is a binary counter integrated circuit manufactured by Rochester Electronics, LLC. It belongs to the CMOS logic family and features a 4-bit asynchronous up-counting architecture. The device is housed in a 14-pin Plastic Dual In-line Package (PDIP). It operates within a supply voltage range of 3V to 15V and supports an extended industrial temperature range from -55°C to 125°C. The component utilizes negative edge triggering for clock inputs and includes an asynchronous reset function.

Feature Summary

• Asynchronous 4-bit binary counting capability with up-direction operation
• Negative edge-triggered clock input mechanism
• Wide operating voltage compatibility supporting 3V to 15V ranges
• Industrial grade thermal stability for extreme environment applications

Applications

• Digital frequency division circuits
• Binary counting sequences in control systems
• Timing and delay generation modules
• Address decoding logic in memory interfaces

Procurement Notes

Verify the manufacturer designation as Rochester Electronics, LLC, which typically handles surplus or discontinued inventory. Confirm the package type is PDIP-14 and check for any specific lot traceability requirements. Ensure the voltage and temperature ratings match the target system specifications before integration.

Selection Notes

Select this component when a robust, wide-voltage CMOS binary counter is required for harsh environments. The 14-pin DIP form factor suits through-hole prototyping and legacy board designs. Consider the asynchronous reset feature for immediate state initialization needs without clock dependency.

Part Context

This part is a variant of the standard MM74C93N binary counter series. Rochester Electronics often sources and redistributes components originally designed by manufacturers such as Fairchild Semiconductor or National Semiconductor. The 'B' suffix may indicate specific testing or packaging variations within the distributor's catalog.

Replacement Considerations

Direct pin-compatible replacements include MM74C93N from ON Semiconductor or Texas Instruments. Other compatible alternatives are available from National Semiconductor and Fairchild Semiconductor, provided the voltage and temperature specifications align with the application requirements.