TC74HC4040AF(EL,F)

Overview

The TC74HC4040AF(EL,F) is a 12-bit binary counter integrated circuit manufactured by Toshiba Semiconductor and Storage. It operates within a supply voltage range of 2 V to 6 V and supports a maximum counting rate of 78 MHz. The device features asynchronous reset functionality and negative-edge triggered flip-flops. It is housed in a 16-SOP surface-mount package with an operating temperature range of -40°C to 85°C. The component belongs to the 74HC logic series and is designated as not suitable for new designs.

Feature Summary

• Provides 12-bit binary counting capability using negative-edge triggered flip-flops
• Features asynchronous reset input for immediate state clearing
• Supports high-speed operation up to 78 MHz counting rate
• Includes protection circuits against static discharge or transient excess voltage on all inputs

Applications

• Digital frequency division circuits
• Binary sequence generation systems
• Timing control applications requiring asynchronous reset

Procurement Notes

Verify component status carefully, as this part is officially classified as not suitable for new designs. Confirm availability through authorized distributors, noting that standard stock may be limited. Ensure the selected packaging variant matches the required reel specifications for automated assembly processes.

Selection Notes

Select this component when a 12-bit synchronous binary counter with asynchronous reset is required in a 16-pin surface-mount format. Consider the 78 MHz speed limit and 2V-6V supply range compatibility with the target system logic levels. Evaluate end-of-life status implications for long-term production planning.

Part Context

This device is part of Toshiba's 74HC series of high-speed CMOS logic ICs. It utilizes silicon gate CMOS technology to achieve performance comparable to equivalent LSTTL devices while maintaining low power dissipation characteristics typical of CMOS families. The 74HC4040 function code designates it specifically as a 12-stage ripple counter.

Replacement Considerations

Public documentation identifies SN74LV4040ANSR from Texas Instruments as a similar substitute option.