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Product Detailed Parameters
- Description：IC MULTIVIBRATOR 45NS 14SOP
- Series：7400
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Logic Type：Monostable
- Independent Circuits：2
- Schmitt Trigger Input：No
- Propagation Delay：45 ns
- Current - Output High, Low：400µA, 16mA
- Voltage - Supply：4.75 V ~ 5.25 V
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Package / Case：14-SOIC (0.209", 5.30mm Width)
- Supplier Device Package：14-SO
- Grade：-
- Qualification：-
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Overview
The SN74121NSR is a monostable multivibrator manufactured by Texas Instruments, housed in a 14-pin SOIC surface-mount package. It operates on a DC supply voltage ranging from 4.75V to 5.25V. The device features Schmitt-trigger inputs for noise immunity and provides one non-inverting output alongside two inverting outputs. Key electrical specifications include a propagation delay of 45ns and an output current capability of 16mA. It functions within a commercial temperature range of 0°C to 70°C.
Feature Summary
- Incorporates Schmitt-trigger inputs to ensure stable triggering and noise rejection.
- Provides flexible output configurations with one non-inverting and two inverting channels.
- Designed for reliable monostable pulse generation in digital logic applications.
Applications
- Timing delays
- Pulse width modulation
- Frequency division
Procurement Notes
Verify the specific suffix 'SR' indicates the tape-and-reel packaging format compatible with automated assembly processes. Confirm that the component meets RoHS compliance standards as documented in the manufacturer's datasheet. Ensure the operating environment remains within the specified commercial temperature limits to maintain performance integrity.
Selection Notes
Select this component when a surface-mount solution for monostable timing is required. The SN74121NSR offers a balance of speed and drive capability suitable for standard TTL-compatible logic families. Consider the 14-pin SOIC footprint for PCB layout constraints compared to through-hole alternatives.
Part Context
This part belongs to the SN74121 family of monostable multivibrators. It serves as a surface-mount variant of the widely used SN74121 series, maintaining functional compatibility while adapting to modern SMD manufacturing requirements. The device is part of the broader 7400-series logic ecosystem.
Replacement Considerations
The SN74121NSRG4 is a verified equivalent offering identical functionality with RoHS-compliant lead-free construction. Other variants such as the SN74121N provide the same logical operations but utilize a PDIP-14 through-hole package instead of surface-mount technology.
