74VHC112MX

Overview

The Fairchild Semiconductor 74VHC112MX is a dual JK flip-flop from the 74VHC series, housed in a 16-SOIC package. It operates on a supply voltage of 2V to 5.5V with a maximum clock frequency of 185 MHz. Key electrical parameters include a propagation delay of 10.5ns at 5V with 50pF load, output currents of ±8mA, and static current of 2µA. The device features negative edge triggering, preset/clear functions, and operates within -40°C to 85°C.

Feature Summary

• Dual JK flip-flops with negative edge triggering for synchronous state changes.
• Asynchronous preset and clear inputs independent of the clock signal.
• Complementary outputs providing differential signal availability.
• High-speed operation compatible with bipolar TTL speeds while maintaining CMOS low power.

Applications

• Parallel-to-serial data conversion circuits.
• Frequency division and counting logic applications.
• State machine implementation in digital control systems.
• Shift register construction for data storage and transfer.

Procurement Notes

Verify the manufacturer origin carefully, as the 74VHC112MX part number is widely distributed by multiple vendors including onsemi and Texas Instruments. Confirm that the specific unit received matches the Fairchild Semiconductor branding if required for compliance or legacy system integration. Check RoHS status and material declarations against project specifications. Ensure the package type is correctly identified as SOIC-16 to avoid mounting errors during assembly.

Selection Notes

Select this component when dual JK functionality with asynchronous control is required in a compact surface-mount format. The 74VHC series offers speed comparable to Schottky TTL but with significantly lower power consumption. Consider the 2V to 5.5V operating range for compatibility with various logic levels. The 16-SOIC package provides a balance between pin count and board space efficiency for moderate complexity designs.

Part Context

The 74VHC112MX belongs to the advanced high-speed CMOS (VHC) logic family, designed to replace older bipolar technologies. It is functionally equivalent to other dual JK flip-flops like the 74LS112 but with improved speed and power characteristics. The 'MX' suffix typically denotes the SOIC-16 package variant. This component is part of a broader ecosystem of VHC logic gates and flip-flops used in general-purpose digital electronics.

Replacement Considerations

Public confirmed substitute part numbers include 74VHC112MTCX (TSSOP-16 package) and 74VHC112N (DIP-16 package). Cross-vendor equivalents such as those from Texas Instruments or onsemi may be functionally identical but require verification of pinout and electrical tolerances. Always check datasheets for minor differences in switching thresholds or package dimensions before substitution.