Texas Instruments SN54ALS109A Data Handbook/Manual
Summary
These dual J-K positive-edge-triggered flip-flops are highly reliable digital logic components designed for robust data storage and circuit control. This technical manual provides comprehensive documentation, including detailed electrical specifications, operational guidelines, temperature range performance across military and commercial grades, and critical timing parameters (setup/hold times) for easy implementation. It is essential reading for hardware engineers and embedded designers who require versatile and stable digital state management in their advanced electronic systems.
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 17 |
| File Size | 683.68 KB |
| Published | June 18, 2026 |
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Frequently Asked Questions
How can I configure this device to function as a D-type flip-flop?
You must tie the J and K inputs together to operate the unit in D-type mode.
What is the operating temperature range for different versions of this chip?
The SN54ALS109A supports military ratings from −55°C to 125°C, while SN74ALS109A operates between 0°C and 70°C.
When is the data transferred to the output stages (Q)?
Data transfers on the positive-going edge of the clock pulse, provided PRE and CLR inputs are inactive (high).
What must I ensure regarding the pre-set or clear inputs?
A low level at PRE or CLR inputs will asynchronously set or reset the outputs regardless of the status of other inputs.