74HCT5555N,112

Overview

The 74HCT5555N,112 is a high-speed Si-gate CMOS programmable delay timer with an integrated oscillator, manufactured by NXP Semiconductors. It operates within the HCT logic family and is pin-compatible with low power Schottky TTL (LSTTL). The device features positive and negative edge triggering, retriggerable or non-retriggerable modes, and a divide-by range of 2 to 2^24. It supports RC, crystal, and external oscillator configurations, providing automatic power-on reset and Schmitt trigger action on both trigger inputs. The output capability is rated at 20 mA.

Feature Summary

• Programmable delay timer with internal oscillator support
• Positive and negative edge triggered with retriggerable/non-retriggerable options
• Divide-by range from 2 to 2^24
• Schmitt trigger action on both trigger inputs

Applications

• Motor control systems
• Delay circuits
• Precision timing applications

Part Context

The 74HCT5555N,112 belongs to the 74HCT series of digital logic ICs. The 'N' suffix typically denotes a DIP package variant, while ',112' indicates the specific tape and reel packaging configuration used for surface-mount assembly processes. This component is part of NXP's standard logic portfolio designed for compatibility with legacy LSTTL interfaces.