74VHC74SJX

Overview

The Fairchild Semiconductor 74VHC74SJX is a dual D-type flip-flop with preset and clear functions, fabricated using advanced high-speed CMOS technology. It operates within a voltage range of 2.0 V to 5.5 V and features three-state outputs for bus-oriented designs. The device provides high noise immunity and low power dissipation, achieving speeds comparable to equivalent Bipolar Schottky TTL. It is housed in an 8-pin SOT-363 package, suitable for surface-mount applications requiring compact form factors.

Feature Summary

• Dual D-type flip-flops with independent preset and clear inputs
• Three-state outputs designed for direct bus system interconnection
• Advanced high-speed CMOS fabrication ensuring low power consumption
• High noise immunity compatible with standard CMOS logic levels

Applications

• Parallel data storage and register circuits
• Shift registers for serial-to-parallel conversion
• Timing control and synchronization logic
• Bus-oriented memory addressing systems

Procurement Notes

Verify the specific suffix SJX against official Fairchild or ON Semiconductor documentation to confirm the exact tape-and-reel packaging configuration and pin assignment. Ensure the component meets RoHS compliance standards required for your assembly process. Cross-reference the manufacturer part number with current datasheets to validate electrical characteristics and thermal performance specifications before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring dual edge-triggered storage elements with asynchronous control inputs. The 74VHC series offers superior speed compared to standard HC logic while maintaining low static power consumption. Consider the SOT-363 package size constraints and ensure the operating voltage range aligns with the system's supply rails. Verify input compatibility with the driving logic family to maintain signal integrity across the interface.

Part Context

The 74VHC74 belongs to the VHCT/VHC family of advanced high-speed CMOS logic devices. This series bridges the performance gap between traditional HC logic and faster bipolar technologies. The 74VHC74 specifically implements dual D-flip-flop functionality, widely used in digital design for state retention and data movement. Its compatibility with standard pinouts allows for easy replacement in existing designs utilizing older logic families.

Replacement Considerations

Equivalent parts include the MM74VHC74MTCX and NCV74VHC74MTCX from ON Semiconductor. Verify that substitute components maintain identical pinout configurations and electrical parameters. Confirm that the alternative supplier's datasheet specifies the same SOT-363 package dimensions and thermal characteristics.