SN74LS273NSR

Flip Flops Overview

The SN74LS273NSR is an octal D-type flip-flop manufactured by Texas Instruments, belonging to the 74LS logic series. It features eight independent positive-edge-triggered D flip-flops with a master reset function, housed in a 20-pin SOIC package. The device operates within a supply voltage range of 4.75V to 5.25V and supports a maximum clock frequency of 40 MHz. Key electrical parameters include a propagation delay of 27 ns at 5V with 15pF load, low-level output current of 8 mA, and high-level output current of -400 µA. It functions within a temperature range of 0°C to 70°C.

Flip Flops Feature Summary

• Octal configuration providing eight independent positive-edge-triggered D-type storage elements
• Master reset functionality for synchronous data clearing across all channels
• Non-inverting output structure compatible with standard TTL logic levels

Flip Flops Applications

• Data latch circuits for temporary signal storage
• Address latch applications in microprocessor systems
• Parallel-to-serial conversion interfaces

Flip Flops Procurement Notes

Verify the specific ordering suffix 'NSR' corresponds to the tape-and-reel packaging format required for automated surface-mount assembly. Confirm that the component meets RoHS3 compliance standards as indicated in official documentation. Ensure the selected variant matches the intended thermal and mechanical constraints for the target PCB layout.

Flip Flops Selection Notes

Select this component when an octal storage solution with a global reset is required for 5V logic systems. Consider the 27 ns propagation delay and 40 MHz clock limit against system timing requirements. Evaluate the SOIC-20 package dimensions against available board space and ensure compatibility with standard reflow soldering profiles for leadless packages.

Flip Flops Part Context

This part belongs to the widely adopted 74LS family of logic integrated circuits, known for low power consumption relative to earlier standards. The SN74LS273 serves as a fundamental building block for sequential logic design, offering reliable performance in general-purpose digital applications requiring multiple synchronized data storage points within a single package.

Flip Flops Replacement Considerations

SN74LS273N (PDIP-20)

Flip Flops FAQ

What is the trigger mechanism for the SN74LS273NSR?

The device utilizes positive-edge triggering, meaning data is latched on the rising edge of the clock signal.

How does the master reset function operate?

The master reset provides a synchronous clearing mechanism for all eight flip-flops simultaneously when activated.