74HC109D,653

Overview

The Nexperia 74HC109D,653 is a dual positive-edge-triggered J-K flip-flop with asynchronous active-low set and reset inputs. It operates within a supply voltage range of 2.0 V to 6.0 V and supports a wide operating temperature range from -40 °C to +125 °C. The device features complementary Q and non-inverting Q outputs, individual J and K inputs, and clock inputs. It is housed in a 16-pin SO package (SOT109) designed for surface-mount technology.

Feature Summary

• Dual positive-edge-triggered J-K flip-flops with independent clock control
• Asynchronous active-low set and reset inputs for immediate state initialization
• Wide supply voltage compatibility supporting 2.0 V to 6.0 V operation
• High noise immunity and ESD protection exceeding standard industrial thresholds

Applications

• Parallel-to-serial data conversion circuits
• Frequency division and counting logic stages
• State machine implementation in digital controllers
• Shift register construction using cascaded J-K configurations

Procurement Notes

Verify the specific suffix '653' corresponds to the SO-16 (SOT109) package variant when sourcing. Confirm RoHS compliance status as per current manufacturer declarations. Ensure the ordering code matches the exact tape-and-reel quantity specifications required for automated assembly processes. Cross-reference the datasheet revision date to guarantee alignment with latest electrical characteristics.

Selection Notes

Select this component when dual independent flip-flops are required in a single package. The HC series offers lower power consumption compared to HCT variants but requires CMOS-compatible input levels. Verify that the system clock rise times do not exceed the specified limits to ensure reliable triggering. Consider the 125 °C maximum junction temperature rating for high-thermal environments.

Part Context

This part belongs to the Nexperia 74HC family of high-speed CMOS logic devices. It provides functional compatibility with equivalent parts from other manufacturers adhering to JEDEC standards. The 74HC109 serves as a fundamental building block for sequential logic design, offering robust performance in general-purpose digital applications requiring reliable state storage and transition capabilities.

Replacement Considerations

Direct pin-compatible substitutes include the 74HCT109D,653 for TTL-level interfacing requirements. Other equivalents may exist from different vendors under similar part numbers, provided they meet the same electrical and mechanical specifications. Always verify package dimensions and thermal characteristics before substitution.