SN74ALS109ANS

Flip Flops Overview

The SN74ALS109ANS is a dual positive-edge-triggered J-K flip-flop from Texas Instruments' Advanced Low-Power Schottky (ALS) logic series. It features TTL-compatible inputs and outputs, housed in a 16-pin SOIC package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical specifications include a maximum propagation delay of 18 ns, a low-level output current of 8 mA, and a high-level output current of -400 µA. It supports inverting and non-inverting outputs and functions within an operating temperature range of 0°C to 70°C.

Flip Flops Feature Summary

• Dual positive-edge-triggered J-K flip-flop configuration with independent clock inputs for each element.
• Advanced Low-Power Schottky (ALS) technology providing faster switching speeds compared to standard LS logic while maintaining low power consumption.
• TTL-compatible input and output structures ensuring direct interface with other TTL devices without additional level shifting.
• Integrated preset and clear functions allowing asynchronous control of the flip-flop states.

Flip Flops Applications

• High-speed digital counters and frequency dividers
• Shift registers for serial-to-parallel data conversion
• State machines and sequential logic control circuits
• Memory register arrays in embedded systems

Flip Flops Procurement Notes

Verify the specific suffix 'ANS' against the manufacturer's official datasheet to confirm the exact package variant and tape/reel specifications. Ensure that the ordering information matches the required industrial temperature range and pinout compatibility for your PCB design. Cross-reference the component marking code with the latest production notices to avoid counterfeit or obsolete stock issues during procurement.

Flip Flops Selection Notes

Select this component when designing circuits requiring moderate speed and low power dissipation. The ALS series offers a balance between performance and energy efficiency suitable for battery-operated or heat-sensitive applications. Consider the 18 ns propagation delay for timing constraints and ensure the 8 mA sink capability meets the load requirements of downstream logic gates or indicators.

Flip Flops Part Context

This part belongs to the SN74ALS family, which represents an evolution of the standard SN74LS series. The ALS designation indicates the use of Advanced Low-Power Schottky technology, characterized by reduced power consumption and improved speed. This specific model provides two independent flip-flops in a single package, serving as a fundamental building block for complex sequential logic designs in digital electronics.

Flip Flops Replacement Considerations

SN74ALS109AN: Equivalent through-hole DIP version with identical logical functionality but different physical packaging. SN74LS109: Standard LS logic alternative with slower speed (40 ns delay) but compatible pinout and logic levels. SN74HCT109: High-CMOS technology option offering CMOS input compatibility while maintaining TTL output drive strength.