74HC109FPEL-E

Overview

The HD74HC109FPEL-E is a dual positive-edge triggered JK flip-flop manufactured by Renesas Electronics. It belongs to the HC/UH series of high-speed silicon-gate CMOS logic devices, offering pin compatibility with low-power Schottky TTL (LSTTL). The component features individual J and K inputs, clock (CP) inputs, asynchronous active-low set (SD) and reset (RD) inputs, and complementary Q and Q outputs. It is housed in a 14-pin plastic small-outline package (SOP-14) with dimensions of 5.50 x 10.06 mm and a 1.27 mm pitch. The device supports a maximum load capacitance of 50 pF and operates within a temperature range up to 85 °C.

Feature Summary

• Dual positive-edge triggered JK flip-flops with independent control inputs
• Asynchronous active-low set and reset functions operating independently of the clock
• Schmitt-trigger action on clock input for tolerance to slow rise and fall times
• High-speed silicon-gate CMOS technology compatible with LSTTL

Applications

• Digital data storage and register circuits
• Frequency division and counter applications
• Shift register implementations
• Timing and synchronization logic systems

Procurement Notes

Verify the specific ordering suffix FPEL-E against the manufacturer's current datasheet to confirm package type and environmental compliance. Ensure the source document explicitly identifies the part as a Renesas product, noting that legacy naming conventions may persist in documentation despite corporate acquisitions. Confirm RoHS status and moisture sensitivity level requirements prior to procurement to align with assembly process constraints.

Selection Notes

Select this component when dual JK flip-flops with asynchronous set and reset are required in high-speed CMOS designs. The HC series offers performance comparable to LSTTL while maintaining lower power consumption. Consider the SOP-14 package for surface-mount applications requiring standard pitch. Verify that the asynchronous nature of the set and reset inputs meets the system's timing requirements without clock dependency.

Part Context

This part is a member of the Renesas 74HC/UH series, which provides high-speed CMOS logic functionality. The 74HC109 specifically implements dual JK flip-flops, a fundamental building block in sequential logic design. As an evolution of standard 74-series logic, it maintains electrical compatibility with older TTL standards while utilizing modern CMOS manufacturing processes for improved efficiency and speed.

Replacement Considerations

Cross-reference with other manufacturers' 74HC109 variants such as those from NXP or Nexperia for functional equivalence. Verify pinout compatibility and electrical specifications including voltage ranges and output drive capabilities before substitution.