SN74ALS867ANT

Counter Dividers Overview

The SN74ALS867ANT is a synchronous, presettable 8-bit up/down counter from the Texas Instruments ALS logic family. It features internal-carry look-ahead circuitry for high-speed cascading and operates on a positive-going clock edge. The device supports asynchronous clear functionality and allows parallel loading of data inputs A through H. Direction control is managed via S0 and S1 select inputs, enabling count-up or count-down modes. It includes dual count-enable inputs (ENP, ENT) and a ripple-carry output (RCO) to facilitate multi-stage expansion without external gating.

Counter Dividers Feature Summary

• Synchronous operation with simultaneous flip-flop triggering eliminates counting spikes.
• Internal carry look-ahead circuitry enables efficient n-bit cascading.
• Fully programmable parallel load capability for any value between 0 and 255.
• Asynchronous clear function resets outputs independently of the clock signal.

Counter Dividers Applications

• High-speed synchronous counting applications
• Multi-stage binary counter expansion
• Programmable timing sequences
• Digital system frequency division

Counter Dividers Procurement Notes

Verify the specific suffix 'NT' corresponds to the standard plastic DIP package configuration as documented in the manufacturer's ordering information. Confirm that the component matches the SN74ALS867A functional specification regarding the asynchronous clear feature. Ensure compatibility with the required operating temperature range of 0°C to 70°C for commercial grade devices before integration into the design.

Counter Dividers Selection Notes

Select this component when synchronous counting with minimal propagation delay is required compared to ripple counters. The internal carry look-ahead reduces cascading complexity. Choose the ALS series for lower power consumption than standard TTL while maintaining higher speed. Verify that the asynchronous clear requirement aligns with the SN74ALS867A variant rather than the synchronous clear SN74ALS869.

Counter Dividers Part Context

This part belongs to the SN74ALS867/869 family of synchronous 8-bit up/down counters. It shares architectural similarities with the SN74AS867 but utilizes Advanced Low-power Schottky (ALS) technology for optimized performance. The NT suffix indicates a standard plastic dual-in-line package suitable for through-hole mounting. It serves as a core building block for complex digital state machines and counters.

Counter Dividers Replacement Considerations

SN74ALS867ADW is a documented alternative offering the same logical function in a Small-Outline (DW) surface-mount package. Both variants maintain identical electrical characteristics and pinout configurations for the active terminals, facilitating direct physical substitution if board layout permits package conversion.