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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 SN74LS123M is a dual retriggerable monostable multivibrator manufactured by onsemi. It features DC triggering from active-high or active-low gated logic inputs, allowing for flexible signal conditioning. The device includes an overriding clear function to terminate output pulses and is compensated for VCC and temperature variations. Pulse width control is achieved through external resistance and capacitance values, with the capability to extend pulse width via retriggering for very long output pulses.
Feature Summary
- Dual retriggerable monostable multivibrator configuration
- DC triggered from active-high or active-low gated logic inputs
- Overriding clear terminates output pulse
- Compensated for VCC and temperature variations
Applications
- Pulse generation circuits
- Timing delay applications
- Frequency division
- Waveform shaping
Procurement Notes
Verify the manufacturer designation carefully, as 'SN' prefixes are historically associated with Texas Instruments while this specific part number is listed under onsemi. Confirm the datasheet revision and package type match your design requirements. Ensure compatibility with low power Schottky logic levels if interfacing with other LS series components.
Selection Notes
Select this component when dual independent monostable circuits are required in a single package. It is suitable for designs needing retriggerable functionality to extend pulse widths up to 100% duty cycle. Consider the external RC timing requirements and ensure the operating temperature range meets system specifications.
Part Context
This component belongs to the 74LS series of low-power Schottky logic devices. It is functionally similar to other monostable multivibrators like the SN74LS122 but offers dual elements. The 'M' suffix typically denotes a plastic small outline package variant common in surface-mount applications.
Replacement Considerations
Compatible substitutes include SN74LS123DR from Texas Instruments and SN74LS123N from ON Semiconductor. Verify pinout compatibility and electrical characteristics before substitution.
