74VHC112SJ

Overview

The Fairchild Semiconductor 74VHC112SJ is a dual J-K flip-flop utilizing advanced high-speed CMOS technology. It operates within a supply voltage range of 2V to 5.5V, featuring low quiescent current of 2µA and input capacitance of 4pF. The device supports an operating temperature range from -40°C to 85°C. Packaged in a 16-lead Small Outline Package (SOP) conforming to EIAJ TYPE II standards, it provides synchronous state changes triggered by the clock's falling edge alongside asynchronous preset and clear functions.

Feature Summary

• Dual independent J-K flip-flops with direct set and clear inputs
• Negative edge-triggered synchronous operation
• Advanced high-speed CMOS fabrication for rapid switching
• Asynchronous inputs override clock signals

Applications

• High-speed digital data storage circuits
• Frequency division and counting logic
• Shift register construction
• State machine implementation

Procurement Notes

Verify the specific ordering suffix SJ against the required package dimensions and lead form. Confirm that the component meets the specified EIAJ TYPE II standard for the 16-lead SOP. Ensure the manufacturer designation aligns with current ON Semiconductor or Fairchild legacy documentation. Check for any discontinuation notices as this series may be phased out. Validate electrical parameters against the official datasheet before integration.

Selection Notes

Select this component when dual J-K functionality is required in a compact surface-mount format. The VHC series offers speed comparable to equivalent TTL devices while maintaining low power consumption. Consider the 2V to 5.5V operating range for compatibility with various logic families. Evaluate the 4pF input capacitance for high-frequency signal integrity requirements in the design.

Part Context

The 74VHC112SJ belongs to the VHC (Very High Speed CMOS) family, designed to replace older logic families with improved performance. It integrates two complete J-K flip-flops into a single 16-pin package. The device is manufactured using silicon gate CMOS technology, ensuring robust noise immunity and fast propagation delays suitable for modern digital systems.

Replacement Considerations

Equivalent parts include the 74VHC112MX and 74VHC112MTCX. Verify pinout compatibility and package dimensions before substitution. Ensure the replacement part maintains the same voltage and temperature specifications.