SN74AHCT123AD Texas Instruments In Stock
SN74AHCT123AD is a dual retriggerable monostable multivibrator by Texas Instruments, featuring AHCT logic with 5V-tolerant inputs and independent trigger/reset controls. Key specs: 2-channel, VCC 4.5–5.5V, propagation delay ~8ns. From $0.41, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Price
- From $0.4147(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual retriggerable monostable multivibrator with independent A and B trigger inputs per channel
- AHCT logic family: 5V-tolerant inputs compatible with 3.3V and 5V systems
- Fast propagation delay (~8ns typical) enabling precise pulse generation
- Independent active-low clear (CLR) input for immediate output reset
- Wide supply voltage range: 4.5V to 5.5V for reliable industrial operation
Applications
The SN74AHCT123AD is widely used in digital timing circuits, pulse stretching, and debouncing applications where precise monostable pulses are required. It is ideal for microcontroller interfacing, bus arbitration, and power sequencing circuits in industrial control and communications equipment. Its 5V-tolerant AHCT inputs make it a versatile choice for mixed-voltage system designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the SN74AHCT123AD and what does it do?
The SN74AHCT123AD is a dual retriggerable monostable multivibrator from Texas Instruments. It generates a single output pulse of a defined width in response to an input trigger. Each of the two independent channels has separate A/B trigger inputs and an active-low CLR reset, making it suitable for pulse generation, debouncing, and timing control applications.
What are the key electrical specifications of the SN74AHCT123AD?
The SN74AHCT123AD operates from a 4.5V to 5.5V supply voltage with 5V-tolerant inputs. It features a typical propagation delay of approximately 8ns, high-level output voltage (VOH) of at least 4.4V, and low-level output voltage (VOL) of 0.1V max. The device is packaged in a 16-pin SOIC (D) package.
Is the SN74AHCT123AD compatible with 3.3V logic systems?
Yes. The SN74AHCT123AD belongs to the AHCT logic family, which features 5V-tolerant inputs. This means its inputs can accept 3.3V logic signals while the device itself operates at 5V, making it an excellent interface component between 3.3V microcontrollers and 5V logic circuits.
What package does the SN74AHCT123AD come in and what are the alternatives?
The SN74AHCT123AD comes in a 16-pin SOIC (D) package with 1.27mm pitch, suitable for surface-mount assembly. Functionally equivalent alternatives include the SN74AHCT123APW (TSSOP-16 package) for tighter board layouts, or the SN74HC123A for 2V–6V operation if strict AHCT timing is not required.
Related Guides
DP83848 10/100 Mbps Ethernet PHY Transceiver: How to Choose the Right Variant
A complete selection guide for the DP83848 family: compare temperature grades, packages, JTAG support, and interface options across all five variants.
Jun 2, 2026
LM5156 Wide-VIN Boost/SEPIC/Flyback Controller: How to Choose the Right Variant
A concise selection guide for the LM5156 and LM51561 family: how to choose between automotive vs industrial grade, spread-spectrum vs fixed-frequency, and WSON-8 vs HTSSOP-14 package.
Jun 2, 2026
24LC01B I2C EEPROM Design Guide: Pinout, Write Timing, and Package Selection
Complete application note for the Microchip 24LC01B 1 Kbit I2C EEPROM: address wiring, pull-up sizing, acknowledge polling, page-write alignment, and package selection.
Jun 1, 2026
AD8531ARTZ-REEL7 Application Note: High-Current Op-Amp Design Guide
A complete design guide for the AD8531ARTZ-REEL7 250 mA rail-to-rail op-amp: decoupling, thermal budgeting, capacitive load stability, and PCB layout best practices.
Jun 1, 2026
Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.0800 | $1.08 |
| 359+ | $0.8400 | $301.56 |
| 1000+ | $0.5552 | $555.20 |
| 10000+ | $0.4950 | $4950.00 |
| 100000+ | $0.4147 | $41470.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”