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Product Detailed Parameters
- Description：RETRIGGERABLE MONOSTABLE MULTIVI
- Series：54LS
- Mfr：Texas Instruments
- Package：Tube
- Logic Type：Monostable
- Independent Circuits：2
- Schmitt Trigger Input：No
- Propagation Delay：34 ns
- Current - Output High, Low：4mA, 400µA
- Voltage - Supply：4.5 V ~ 5.5 V
- Operating Temperature：-55°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：16-CFlatPack
- Supplier Device Package：16-CFP
- Grade：-
- Qualification：-
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Overview
The SNJ54LS123W is a dual retriggerable monostable multivibrator manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of -55°C to 125°C. The device features complementary outputs and utilizes Low-Power Schottky (LS) logic technology. It is housed in a 16-pin Ceramic Flatpack (CFP) package with glass-sealed construction.
Feature Summary
- Retriggerable operation allows pulse width extension via gated inputs
- Complementary output polarity provides both true and inverted signals
- Internal timing resistor enables capacitor-only external timing configuration
Applications
- Timing delay generation
- Pulse width modulation
- Frequency division circuits
Procurement Notes
Verify the specific ordering suffix 'W' corresponds to the Ceramic Flatpack package variant. Confirm military or space qualification requirements if applicable, as standard catalog versions may differ in packaging and testing protocols. Ensure compatibility with existing board layouts for the CFP footprint.
Selection Notes
Select this component when dual independent monostable circuits are required in a ruggedized ceramic package. The LS series offers lower power consumption compared to standard TTL. Consider the internal timing resistor feature if minimizing external components is a priority for the design.
Part Context
This part belongs to the SN54/74LS123 family of retriggerable monostable multivibrators. It shares functional characteristics with the SN54LS122 but differs in pinout and internal timing resistor availability. The SNJ prefix indicates a military-grade or high-reliability variant produced by Texas Instruments.
Replacement Considerations
- SNJ54LS122J
- SNJ54LS122W
FAQ
Does the SNJ54LS123W include an internal timing resistor?
Yes, the SN54LS123 includes an internal timing resistor, allowing it to be used with only an external capacitor for pulse width programming.
What is the output configuration of this device?
The device provides complementary outputs, meaning it has both true and inverted output pins available for each monostable circuit.
