74HC123N,652

Overview

The NXP USA Inc. 74HC123N,652 is a dual retriggerable monostable multivibrator housed in a 16-lead plastic DIP package (SOT38-4). It operates within a supply voltage range of 2.0 V to 6.0 V and supports an ambient temperature range from -40 °C to +125 °C. The device features Schmitt-trigger inputs for noise immunity and allows pulse width control via external resistor and capacitor selection. Propagation delay ranges from 24 ns to 255 ns depending on voltage, with output currents up to ±5.2 mA.

Feature Summary

• Dual retriggerable monostable multivibrator architecture
• Schmitt-trigger action on trigger inputs for slow signal tolerance
• Direct reset input capability to terminate output pulses
• Pin-compatible with Low-power Schottky TTL (LSTTL)

Applications

• Timing pulse generation
• Frequency division
• Pulse width modulation
• Timer applications

Procurement Notes

Verify the specific ordering suffix '652' against current NXP documentation to confirm packaging and compliance details. Ensure the DIP16 package variant matches the required mechanical constraints. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and current product status before procurement.

Selection Notes

Select this component when a dual-channel monostable circuit with retriggering capability is required. It is suitable for designs needing compatibility with LSTTL logic levels or operating across a wide voltage range of 2V to 6V. Consider the DIP16 package for through-hole mounting requirements and verify that the external timing components can support the desired pulse width specifications.

Part Context

This device belongs to the 74HC series of high-speed Si-gate CMOS logic devices. It is functionally identical to the 74HC423 but includes additional triggering capability via the reset input. The 74HC123 family is designed for general-purpose digital applications requiring precise timing control and robust noise immunity in industrial and commercial environments.

Replacement Considerations

The 74HCT123N,652 serves as a compatible alternative within the same family, offering HCT logic level compatibility while maintaining pinout equivalence.