74HC5555D,118

Overview

The Nexperia 74HC5555D,118 is a precision programmable delay timer featuring a 24-stage binary counter and an integrated oscillator. It supports supply voltages from 2.0 V to 6.0 V and offers positive or negative edge triggering with retriggerable or non-retriggerable modes. The device provides a divide-by range of 2 to 2^24 and includes automatic power-on reset and Schmitt trigger inputs for noise immunity. It operates within temperature ranges of -40 °C to +85 °C and -40 °C to +125 °C.

Feature Summary

• Programmable delay timer with 24-stage binary counter
• Supply voltage range: 2.0 V to 6.0 V
• Three oscillator modes: RC, Crystal, External
• Retriggerable/non-retriggerable monostable operation

Applications

• Motor control
• Delay circuits
• Precision timing
• Domestic appliances

Procurement Notes

Verify the ordering suffix '118' against official Nexperia documentation to confirm specific packaging details such as tape and reel specifications. Confirm that the SO16 package variant matches the required board layout dimensions and lead pitch.

Selection Notes

Select this component when digital timing precision is required over analog alternatives. Ensure external timing components (RT, CT) are chosen to maintain oscillator frequency within specified limits. Verify that the application environment stays within the -40 °C to +125 °C operating temperature range.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It is pin-compatible with low-power Schottky TTL (LSTTL) standards. The device complies with JEDEC standard no. 7A and features ESD protection exceeding 2000 V (HBM).

Replacement Considerations

Check for direct equivalents in the 74HCT5555 family if TTL-level input compatibility is necessary. Verify functional equivalence with other programmable delay timers if specific oscillator configurations differ.