SN74ALS869DWR

Counter Dividers Overview

The SN74ALS869DWR is a synchronous 8-bit up/down binary counter from the Texas Instruments ALS logic family. It features internal-carry look-ahead circuitry for high-speed cascading and operates on a 24-pin SOIC (DW) package. The device supports parallel loading, counting up or down based on select inputs, and includes count-enable controls. It functions within a supply voltage range of 4.5 V to 5.5 V and an operating temperature range of 0°C to 70°C.

Counter Dividers Feature Summary

• Synchronous operation with simultaneous flip-flop clocking eliminates output counting spikes associated with asynchronous counters.
• Internal carry look-ahead circuitry enables efficient n-bit cascading without additional external gating.
• Fully programmable architecture allows presetting to any value between 0 and 255 via synchronous parallel loading.

Counter Dividers Applications

• High-speed synchronous counting applications requiring ripple-carry output for multi-stage expansion
• Digital systems utilizing fully independent clock circuits for simplified timing design
• Programmable counters requiring precise direction control through S0 and S1 select inputs

Counter Dividers Procurement Notes

Verify the specific ordering suffix 'DWR' corresponds to the SOIC-24 tape-and-reel packaging configuration. Confirm that the component meets RoHS standards as indicated by the E4 lead finish designation in official documentation. Ensure the procurement channel sources production data consistent with the SDAS115C datasheet specifications.

Counter Dividers Selection Notes

Select this component when synchronous 8-bit counting with internal carry lookahead is required. It differs from the SN74ALS867A variant by providing synchronous clear functionality rather than asynchronous clear. Consider the ALS series characteristics regarding power consumption and speed compared to standard TTL or AS families for system compatibility.

Counter Dividers Part Context

This part belongs to the SN74ALS869 family of synchronous 8-bit up/down counters manufactured by Texas Instruments. It shares functional similarities with the SN74ALS867A but utilizes synchronous clearing mechanisms. The DW package variant indicates a plastic small-outline form factor suitable for surface-mount assembly techniques.

Counter Dividers Replacement Considerations

SN74ALS869DW serves as the tube-packaged equivalent. SN74ALS869DWE4 represents the RoHS-compliant version with identical electrical characteristics. Verify pinout compatibility before substituting with other ALS family counters.