74LVT574MSAX

Overview

The onsemi 74LVT574MSAX is an obsolete octal D-type flip-flop with three-state outputs, manufactured in a 20-SSOP package. It operates within a supply voltage range of 2.7V to 3.6V and supports clock frequencies up to 150 MHz. The device features positive-edge triggering and non-inverting outputs. Key electrical specifications include a maximum propagation delay of 4.6ns at 3.3V with 50pF load, output drive currents of 32mA (high) and 64mA (low), and a static current of 190 µA. It functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Octal D-type flip-flop architecture with positive-edge triggering for data storage and synchronization
• Three-state outputs designed for efficient bus-oriented applications and signal isolation
• High-speed performance supporting clock frequencies up to 150 MHz
• Robust output drive capability with asymmetric high and low current sourcing

Applications

• Data storage and buffering in digital logic circuits
• Synchronization of signals in high-speed communication systems
• Bus-oriented register designs requiring three-state control
• Parallel-to-serial conversion interfaces

Procurement Notes

This component is officially discontinued and no longer manufactured by onsemi. Procurement must focus on verified replacement parts from other manufacturers. Verify that substitute devices match the original pinout, voltage range, and speed requirements. Check datasheets for any functional differences in output drive or timing characteristics before integration into existing designs.

Selection Notes

When selecting a replacement for this obsolete part, prioritize devices with compatible 20-pin surface mount packages such as SSOP or TSSOP. Ensure the substitute supports the required 2.7V to 3.6V supply voltage and maintains similar propagation delays for timing integrity. Evaluate output drive strengths to ensure adequate loading capacity for the target application circuitry.

Part Context

The 74LVT574MSAX belongs to the LVT series of logic ICs, characterized by operation at lower voltages compared to standard LVTTTL while maintaining compatibility. As an octal flip-flop, it provides eight independent storage elements in a single package, commonly used in microprocessor-based systems and memory interface circuits where parallel data handling is essential.

Replacement Considerations

Direct substitutes include SN74LVT574PWR from Texas Instruments. Other potential replacements may include SN74LVTH574 variants from Texas Instruments or Nexperia equivalents, provided they match the 20-pin package and electrical specifications.