SN74LS423NIn StockTexas Instruments
SN74LS423N is a dual retriggerable monostable multivibrator IC from Texas Instruments. Features 2-bit output with minimum pulse width of 116ns, 15pF load capacitance, and LS-family logic. From $2.71, in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SN74LS423N Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.7125(MOQ 89)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual retriggerable monostable multivibrator with independent A and B sections
- Minimum output pulse width of 116ns at REXT=5kΩ and CEXT=0 for precise timing control
- LS-family TTL logic with 15pF load capacitance and 8mA output sink current
- 16-pin PDIP package with external RC timing components for flexible pulse width configuration
Applications
The SN74LS423N is widely used in digital timing circuits, pulse generation, and signal conditioning applications. It serves as a reliable one-shot timer in microprocessor systems, industrial control boards, and communications equipment. The retriggerable feature makes it ideal for watchdog timers, debounce circuits, and frequency-to-pulse width conversion in embedded systems.
Specifications
| YTEOL | 15 |
| Additional Feature | RETRIGGERABLE; MIN OUTPUT PULSE WIDTH = 116NS @ REXT = 5K OHM & CEXT = 0 |
| Family | LS |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | MONOSTABLE MULTIVIBRATOR |
| Max I(ol) | 0.008A |
| Number of Bits | 2 |
| Number of Data/Clock Inputs | 2 |
| Number of Functions | 2 |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 20mA |
| Propagation Delay (tpd) | 56ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia, Mexico |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74LS423N:
Frequently Asked Questions
What is the minimum output pulse width of the SN74LS423N?
The SN74LS423N has a minimum output pulse width of 116ns when REXT is 5kΩ and CEXT is 0pF. The pulse width can be extended by increasing the external resistor and capacitor values connected to the RXT and CXT pins, allowing flexible timing configuration from nanoseconds to milliseconds.
What are typical applications for the SN74LS423N monostable multivibrator?
The SN74LS423N is commonly used in pulse generation, digital timing circuits, signal debouncing, watchdog timer implementations, and frequency-to-pulse-width conversion. Its dual retriggerable sections make it suitable for industrial control systems, communication equipment, and embedded microprocessor designs requiring precise one-shot timing.
What package type is the SN74LS423N available in and what is its pin count?
The SN74LS423N is available in a 16-pin Dual-In-Line Package (PDIP), with JESD-30 code R-PDIP-T16. This through-hole package is ideal for prototyping and through-hole PCB designs, offering easy hand-soldering and breadboard compatibility.
Is the SN74LS423N retriggerable and why does that matter?
Yes, the SN74LS423N is a retriggerable monostable multivibrator, meaning a new trigger pulse applied before the output pulse ends will restart the timing cycle. This feature is essential in applications like watchdog timers and noise immunity circuits, where continuous triggering must keep the output active as long as input signals are present.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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