SN74LS377NE4

Flip Flops Overview

The SN74LS377NE4 is an octal D-type flip-flop with clock enable, belonging to the Texas Instruments SN74LS series. It features TTL input and output types in a non-inverting configuration within a 20-pin PDIP package. The device operates on a supply voltage ranging from 4.75 V to 5.25 V. Key electrical parameters include a propagation delay of 27 ns, a high-level output current of -400 uA, and a low-level output current of 8 mA. It supports through-hole mounting and functions within a temperature range of 0°C to +70°C.

Flip Flops Feature Summary

• Contains eight independent D-type flip-flops for parallel data storage
• Includes a dedicated clock enable input to control data latching
• Provides non-inverting outputs synchronized with positive clock edges

Flip Flops Applications

• Parallel-to-serial data conversion circuits
• General-purpose digital register applications
• Memory buffer stages in logic systems

Flip Flops Procurement Notes

Verify that the specific order matches the SN74LS377NE4 designation to ensure correct LS-TTL logic family compatibility. Confirm the 20-pin PDIP package requirement aligns with the target PCB footprint. Ensure the operating environment stays within the specified 0°C to +70°C range and that the power supply remains strictly between 4.75 V and 5.25 V for reliable performance.

Flip Flops Selection Notes

Select this component when an octal D-type flip-flop with active clock enable is required for TTL-based designs. It serves as a direct replacement for standard SN74LS377 devices in legacy systems. Consider the 27 ns propagation delay and 8 mA sink capability when designing for speed and load requirements. Verify that the through-hole packaging fits the assembly constraints.

Flip Flops Part Context

This part belongs to the widely used SN74LS (Low-power Schottky) logic family, known for balanced speed and power consumption. The SN74LS377 specifically provides octal storage capabilities, distinguishing it from hex or quad variants. The 'E4' suffix typically indicates lead-free composition and environmental compliance, adhering to modern manufacturing standards while maintaining functional equivalence to the base SN74LS377 model.

Flip Flops Replacement Considerations

SN74LS377N

Flip Flops FAQ

What is the function of the clock enable input?

The clock enable input controls whether the flip-flops respond to the clock signal. When enabled, data is latched on the rising edge; when disabled, the output state remains unchanged regardless of clock transitions.

Does this device support negative logic levels?

No, the SN74LS377NE4 is a non-inverting device. The outputs follow the logic state of the inputs directly upon clocking.