SN74HC4040D

Overview

The SN74HC4040D is a 12-stage asynchronous binary counter from the Texas Instruments HC logic family. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range of -40°C to +85°C. The device features a typical propagation delay of 12 ns, with maximum clock frequencies reaching 22 MHz at 5 V. It provides outputs for all 12 stages and includes an asynchronous clear input that resets all outputs to a low state upon receiving a high signal.

Feature Summary

• Provides external access to all 12 binary counter stage outputs
• Asynchronously clears all outputs to a low level via a dedicated control input
• Advances the count sequence on high-to-low transitions at the clock input

Applications

• Time-delay circuits
• Counter controls
• Frequency-dividing circuits

Procurement Notes

Verify the specific package designation 'D' corresponds to the SOIC-16 form factor in your Bill of Materials. Confirm that the required operating temperature range aligns with the commercial grade (-40°C to +85°C) rather than the military grade specifications. Ensure design compatibility with the HC logic family voltage levels before finalizing procurement orders.

Selection Notes

Select this component when a single-chip solution for 12-bit asynchronous counting is required. It is suitable for designs needing full stage visibility without cascading multiple smaller counters. Verify that the system's clock frequency remains within the specified limits for the chosen supply voltage to ensure reliable operation.

Part Context

This part belongs to the SNx4HC4040 series of 12-bit asynchronous binary counters manufactured by Texas Instruments. The 'SN74' prefix indicates it is a commercial-grade device compliant with standard industrial specifications. It is distinct from the SN54 series, which is rated for extended military temperatures.

Replacement Considerations

Check the Package Option Addendum for current availability status. The SN74HC4040DR (SOIC, Tape & Reel) serves as a functional equivalent with identical electrical characteristics but differs in packaging format.