74HCT109PW,118

Overview

The Nexperia 74HCT109PW,118 is a dual positive-edge-triggered JK flip-flop with asynchronous set and reset inputs. It operates within a supply voltage range of 4.5 V to 5.5 V. The device features TTL-compatible input levels and includes clamp diodes on all inputs for overvoltage protection. Packaged in a 16-pin TSSOP (SOT403) surface-mount case, it supports an operating temperature range from -40 °C to +125 °C.

Feature Summary

• Dual positive-edge-triggered JK flip-flops with individual J and K inputs
• Asynchronous active LOW set and reset inputs independent of clock
• TTL-compatible input threshold levels for direct logic interfacing
• Input clamp diodes enable safe interface to voltages exceeding VCC

Applications

• Data storage and register applications requiring dual flip-flop functionality
• Counters and shift registers utilizing JK toggle or D-type configurations
• Timing circuits requiring positive-edge clock synchronization
• Automotive electronic systems certified under AEC-Q100 standards

Procurement Notes

Verify the complete ordering code including the suffix ,118 to ensure correct packaging configuration. Confirm that the target application environment remains within the specified -40 °C to +125 °C temperature range. Ensure power supply stability stays between 4.5 V and 5.5 V to maintain valid logic levels. Check for any recent Product Change Notifications regarding assembly or labeling updates before finalizing procurement orders.

Selection Notes

Select this component when dual positive-edge triggered JK flip-flops are required with TTL-level compatibility. The HCT series ensures interoperability with standard TTL logic families while maintaining CMOS low power dissipation characteristics. Consider the TSSOP-16 package dimensions for PCB layout constraints. Verify that the asynchronous set and reset requirements align with system state initialization needs.

Part Context

This part belongs to the Nexperia 74HCT family of high-speed CMOS logic devices. It provides dual JK flip-flop functionality within a single integrated circuit. The device is designed for robust performance in automotive and industrial environments, adhering to strict reliability standards. It serves as a fundamental building block for sequential logic circuits requiring precise edge-triggered data handling.

Replacement Considerations

Cross-reference with other manufacturers' 74HCT109 equivalents if supply constraints exist. Ensure pinout compatibility and logical function parity when substituting. Verify that alternative sources meet the same AEC-Q100 qualification and temperature specifications.