SN74H55N

Overview

The SN74H55N is a high-speed CMOS logic component manufactured by Texas Instruments, belonging to the 74H series. It functions as a dual 4-input AND gate with an additional 2-input AND gate feature, designed for complex logic operations in digital circuits. The device operates within a standard voltage range and utilizes a 16-pin DIP package, ensuring compatibility with through-hole mounting techniques. Its high-speed performance characteristics make it suitable for applications requiring rapid signal processing and reliable logic gating in consumer electronics and industrial control systems.

Feature Summary

• Dual 4-input AND gate configuration combined with a single 2-input AND gate for versatile logic implementation
• High-speed CMOS technology enabling fast switching speeds and low power consumption compared to older TTL counterparts
• Robust noise immunity and stable operation across standard operating temperature ranges

Applications

• Digital logic circuits requiring multiple AND operations
• Industrial control systems for signal gating
• Consumer electronics involving binary data processing

Procurement Notes

Verify the specific manufacturer marking and date code on the component body to ensure authenticity. Confirm that the package type matches the required 16-pin DIP specification for your PCB layout. Check for any obsolescence notices from the manufacturer or authorized distributors before placing orders, as legacy logic families may have limited production runs.

Selection Notes

Select this component when a combination of dual 4-input and single 2-input AND gates is needed in a single package. Ensure the design requirements align with the high-speed CMOS electrical characteristics rather than standard TTL levels. Consider pin compatibility if replacing older 74S or 74LS equivalents, noting the different voltage thresholds and drive capabilities inherent to CMOS technology.

Part Context

This part belongs to the Texas Instruments 74H series of high-speed CMOS logic devices. The 'N' suffix typically denotes a plastic dual in-line package (PDIP). It serves as a logical evolution in CMOS logic families, offering improved speed over earlier HC variants while maintaining low power dissipation. The series is widely used in general-purpose digital logic applications where moderate speed and standard packaging are sufficient.

Replacement Considerations

Direct pin-compatible substitutes may include other manufacturers' 74H55 equivalents, such as those from ON Semiconductor or NXP, provided they adhere to the same JEDEC standards. Verify electrical parameters like propagation delay and output current capability to ensure functional equivalence in the specific circuit design.