DM74ALS109AN

Overview

The DM74ALS109AN is a dual J-K flip-flop manufactured by Fairchild Semiconductor, belonging to the Advanced Low-power Schottky (ALS) logic family. It features TTL-compatible inputs and outputs housed in a standard 16-pin PDIP package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical specifications include a propagation delay of 18 ns, a high-level output current capability of -400 µA, and a low-level output current of 8 mA. Designed for through-hole mounting, it supports an operating temperature range starting from 0°C.

Feature Summary

• Dual J-K flip-flop configuration with TTL-compatible input and output levels
• Advanced Low-power Schottky process ensuring improved AC performance over LS counterparts
• Functionally and pin-for-pin compatible with standard Schottky and Low-power Schottky TTL devices

Applications

• Synchronous digital counting circuits
• Data storage and register applications
• State machine control logic

Procurement Notes

Verify the manufacturer designation on the component marking against Fairchild Semiconductor records. Confirm the specific suffix 'AN' corresponds to the 16-lead plastic DIP package variant. Ensure compliance with RoHS directives if required for the assembly process. Cross-reference datasheet revision dates to confirm parameter validity.

Selection Notes

Select this component when dual edge-triggered J-K flip-flops are required in designs utilizing legacy TTL logic families. The ALS series offers a balance of speed and power consumption superior to standard LS logic. Verify that the system voltage remains strictly within the 4.5 V to 5.5 V window to maintain timing integrity.

Part Context

This part belongs to the DM74ALS series, representing Fairchild's implementation of Advanced Low-power Schottky technology. It serves as a direct replacement for older SN74ALS109 units. The series is characterized by reduced power dissipation while maintaining switching speeds comparable to original Schottky TTL standards.

Replacement Considerations

• SN74ALS109N