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Product Detailed Parameters
- Description：IC MULTIVIBRATOR
- Series：*
- Mfr：onsemi
- Package：Bulk
- Logic Type：-
- Independent Circuits：-
- Schmitt Trigger Input：-
- Propagation Delay：-
- Current - Output High, Low：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The SN74LS123MR1 is a dual retriggerable monostable multivibrator manufactured by onsemi. It operates within the standard 74LS logic family and is housed in a 16-lead Small Outline Integrated Circuit (SOIC) package with tape-and-reel packaging. The device features DC-triggered inputs that accept active-high or active-low gated logic signals. Pulse width control is achieved through external resistance and capacitance values, allowing for precise timing adjustments. The circuitry is compensated for variations in supply voltage (VCC) and temperature to ensure stable operation across industrial conditions.
Feature Summary
- Dual independent monostable multivibrator circuits
- Retriggerable functionality for extended pulse generation
- DC-triggered inputs compatible with active-high or active-low logic levels
- Internal compensation for VCC and temperature variations
Applications
- Pulse generation and shaping
- Timing delay circuits
- Frequency division
- Debouncing switches
Procurement Notes
Verify the manufacturer marking matches onsemi specifications. Confirm the part number suffix indicates the SOIC-16 tape and reel configuration. Ensure the component meets the required operating temperature range and logic family standards before integration into production designs.
Selection Notes
Select this component when dual retriggerable monostable functions are required in a compact surface-mount format. It serves as a direct replacement for other 74LS123 variants in existing designs, provided the package type and reel quantity requirements are met. Verify compatibility with existing PCB footprints and assembly processes.
Part Context
This component belongs to the 74LS series of low-power Schottky logic devices. It is functionally equivalent to the SN74LS123 but specified in a tape-and-reel package suitable for automated surface-mount assembly. The device maintains the electrical characteristics of the standard 74LS family while offering manufacturing efficiency through reel packaging.
Replacement Considerations
Direct substitutes include SN74LS123DR from Texas Instruments and MC74LS123DR2G from onsemi. Verify package dimensions and pinout compatibility before substitution.
