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Product Detailed Parameters
- Description：IC MULTIVIBRATOR 77NS 16SO
- Series：74HCT
- Mfr：Nexperia USA Inc.
- Package：Bulk,Tube
- Logic Type：Monostable
- Independent Circuits：2
- Schmitt Trigger Input：Yes
- Propagation Delay：77 ns
- Current - Output High, Low：4mA, 4mA
- Voltage - Supply：4.5 V ~ 5.5 V
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：16-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：16-SO
- Grade：-
- Qualification：-
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Overview
The Nexperia 74HCT123D,652 is a dual retriggerable monostable multivibrator with reset housed in a 16-lead SOIC (SOT109-1) package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C. The device features TTL-compatible input levels and includes Schmitt-trigger action on the nA and nB inputs for improved noise immunity. Output pulse width is programmed via external components REXT and CEXT, allowing for retriggering up to a 100% duty factor. A direct LOW-going edge on the nRD input terminates the output pulse immediately.
Feature Summary
- Dual independent monostable circuits with active HIGH and active LOW outputs
- Retriggerable functionality enabling extension of output pulse duration
- Schmitt-trigger inputs provide tolerance for slow signal transitions
- Direct reset input allows immediate termination of the output pulse
Applications
- Timing generation and pulse stretching
- Debouncing of mechanical switches
- Frequency division and pulse width modulation
Procurement Notes
Verify the specific ordering suffix
Selection Notes
Select this component when a dual-channel timing solution with TTL logic compatibility is required. The HCT series ensures interface compatibility with standard TTL devices while maintaining CMOS power efficiency. Ensure the application requires the SOIC-16 footprint and that the operating temperature range extends to +125 °C.
Part Context
This part belongs to the Nexperia 74HCT123 family, which also includes variants in TSSOP and DHVQFN packages. The 'D' designation specifically identifies the SOIC plastic small outline package with a 3.9 mm body width. This family provides a versatile solution for applications requiring precise timing control with flexible triggering options.
Replacement Considerations
The 74HCT123PW,118 serves as a functional substitute but utilizes a TSSOP-16 package instead of SOIC. Verify pinout compatibility and physical board space constraints before substitution.
