SN74AS867DWE4

Counter Dividers Overview

The SN74AS867DWE4 is a synchronous 8-bit up/down counter manufactured by Texas Instruments. It features internal-carry look-ahead circuitry for cascading in high-speed counting applications and operates within the AS logic series. The device supports bidirectional counting controlled by S0 and S1 select inputs, with ENP and ENT enable inputs. It utilizes a buffered clock input to trigger flip-flops on the rising edge, eliminating output counting spikes associated with asynchronous counters. The component is housed in a 24-pin Small-Outline (DW) package and is characterized for operation from 0°C to 70°C.

Counter Dividers Feature Summary

• Synchronous operation eliminates output counting spikes by clocking all flip-flops simultaneously.
• Internal carry look-ahead circuitry simplifies n-bit cascading without additional gating.
• Fully programmable preset capability allows loading any value between 0 and 255 synchronously.

Counter Dividers Applications

• High-speed binary counting applications
• Cascaded multi-bit counter systems
• Programmable timing circuits

Counter Dividers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current Package Option Addendum to confirm lead finish, moisture sensitivity level, and operating temperature range. Ensure the procurement matches the exact DW package configuration required for the design. Confirm RoHS compliance status as indicated in the official documentation before finalizing orders.

Counter Dividers Selection Notes

Select this component when synchronous counting with minimal propagation delay skew is required. The internal carry look-ahead reduces external logic complexity compared to ripple counters. Verify that the system voltage aligns with the recommended operating conditions for the AS series. Consider the 24-pin SOIC package dimensions for PCB layout constraints.

Counter Dividers Part Context

This part belongs to the Texas Instruments SN74AS family of logic devices. It shares functional similarities with the SN74ALS867A and SN74AS869 but differs in clear mechanism and electrical characteristics. The SN74AS867 provides asynchronous clear functionality distinct from the synchronous clear found in other variants within the same datasheet document.

Counter Dividers Replacement Considerations

SN74ALS867ADW