SN74AS109ADR

Flip Flops Overview

The SN74AS109ADR is a dual positive-edge-triggered J-K flip-flop from Texas Instruments' AS logic series. It features active-low clear and preset inputs for direct control. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 9 ns, a low-level output current of 20 mA, and a high-level output current of -2 mA. It is housed in a 16-SOIC surface-mount package and supports an operating temperature range of 0°C to +70°C.

Flip Flops Feature Summary

• Dual positive-edge-triggered J-K flip-flops with independent clock inputs
• Active-low asynchronous clear and preset capabilities
• High-speed operation with 9 ns propagation delay characteristic of the AS series

Flip Flops Applications

• Binary storage elements in digital logic circuits
• Frequency division and counting applications
• Shift register construction

Flip Flops Procurement Notes

Verify the specific suffix 'ADR' corresponds to the SOIC-16 surface-mount package variant when sourcing. Confirm that the component meets the required industrial temperature range specifications for the intended environment. Ensure compatibility with standard 5V logic levels during integration. Cross-reference the manufacturer's latest datasheet revision to confirm pinout consistency and electrical characteristics before finalizing procurement orders.

Flip Flops Selection Notes

Select this component for designs requiring high-speed switching performance compared to standard LS or F series alternatives. The AS series offers superior speed while maintaining compatible logic levels with other TTL devices. Consider the surface-mount packaging for automated assembly processes. Evaluate the 20 mA sink capability against load requirements to ensure signal integrity across interconnects.

Flip Flops Part Context

This part belongs to the SN74AS100A series, representing advanced Schottky technology designed for high-speed applications. It serves as a successor to earlier logic families, providing faster transition times. The dual flip-flop configuration allows for compact implementation of sequential logic functions within a single integrated circuit package.

Flip Flops Replacement Considerations

SN74AS109AN (PDIP-16 package)

Flip Flops FAQ

What are the trigger conditions for the J-K flip-flops?

The flip-flops are triggered on the rising edge of the clock input signal.

How are the clear and preset functions activated?

Both clear and preset inputs are active-low, meaning they activate when driven to a logical low state.