SN74LS669D

Counter Dividers Overview

The SN74LS669D is a synchronous bidirectional universal counter and register manufactured by Texas Instruments. It belongs to the 74LS logic family and features a 16-pin SOIC package. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports an operating temperature range of 0°C to +70°C. Key electrical parameters include a maximum propagation delay of 38 ns at 5 V with a 50 pF load, a maximum static current of 8 mA, and output drive capabilities of -400 µA (high) and 8 mA (low).

Counter Dividers Feature Summary

• Synchronous bidirectional counting functionality with selectable up or down modes.
• Universal register capability allowing parallel data loading and serial shifting.
• Programmable terminal count output for cascading applications.

Counter Dividers Applications

• Digital frequency counters requiring precise time-base division.
• Position control systems utilizing bidirectional tracking.
• Data acquisition systems needing temporary storage and shift operations.

Counter Dividers Procurement Notes

Verify the specific suffix 'D' confirms the SOIC surface-mount package variant. Confirm RoHS compliance status as LS series components may have varying environmental declarations depending on production date. Ensure the supplier provides official datasheets matching the SN74LS669 specification to avoid confusion with similar 74xx logic families.

Counter Dividers Selection Notes

Select this component when synchronous operation is required for reliable timing in high-speed digital circuits. The bidirectional nature makes it suitable for applications requiring both increment and decrement operations without external logic. Verify that the 74LS speed and power consumption profile aligns with the system's thermal and performance constraints compared to faster HC or HCT alternatives.

Counter Dividers Part Context

This part is part of the standard 74LS TTL logic family, widely used in legacy and industrial digital designs. It serves as a versatile building block for sequential logic, combining counting and register functions in a single integrated circuit. Its availability in a 16-pin package facilitates compact PCB layouts for complex digital systems.

Counter Dividers Replacement Considerations

SN74LS669N: Pin-compatible through-hole DIP alternative from Texas Instruments offering identical logical functionality for prototyping or board revisions requiring different mounting styles.