74AHC123A; 74AHCT123A
Dual retriggerable monostable multivibrator with reset
The 74AHC123A; 74AHCT123A is a dual retriggerable monostable multivibrator with reset. The basic output pulse width is programmed by selection of external components (REXT and CEXT). Once triggered this basic pulse width may be extended by retriggering either of the edge triggered inputs (nA or (nB). By repeating this process, the output pulse period (nQ = HIGH, nQ = LOW) can be made as long as desired. Alternatively, an output delay can be terminated at any time by a LOW-going edge on input nRD. Inputs are overvoltage tolerant. This feature allows the use of these devices as translators in mixed voltage environments.
Features and benefits
Wide supply voltage range from 2.0 V to 5.5 V
DC triggered from active HIGH or active LOW inputs
Retriggerable for very long pulses up to 100 % duty factor
Direct reset terminates output pulse
Overvoltage tolerant inputs to 5.5 V
All inputs have a Schmitt-trigger action
High noise immunity
Input levels:
For 74AHC123A: CMOS level
For 74AHCT123A: TTL level
Latch-up performance exceeds 100 mA per JESD 78 Class II Level A
ESD protection:
HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Parametrics
| Type number | VCC (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | Power dissipation considerations | Tamb (°C) | Package name |
|---|---|---|---|---|---|---|---|
| 74AHC123ABQ | 2.0 - 5.5 | CMOS | ± 8 | 5.1 | low | -40~125 | DHVQFN16 |
| 74AHC123AD | 2.0 - 5.5 | CMOS | ± 8 | 5.1 | low | -40~125 | SO16 |
| 74AHC123APW | 2.0 - 5.5 | CMOS | ± 8 | 5.1 | low | -40~125 | TSSOP16 |
| 74AHCT123ABQ | 4.5 - 5.5 | TTL | ± 8 | 5.0 | low | -40~125 | DHVQFN16 |
| 74AHCT123AD | 4.5 - 5.5 | TTL | ± 8 | 5.0 | low | -40~125 | SO16 |
| 74AHCT123APW | 4.5 - 5.5 | TTL | ± 8 | 5.0 | low | -40~125 | TSSOP16 |
Package
| Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
|---|---|---|---|---|---|---|---|
| 74AHC123ABQ | 74AHC123ABQ,115 (935285424115) |
Active | AC123A |
DHVQFN16 (SOT763-1) |
SOT763-1 | SOT763-1_115 | |
| 74AHC123AD | 74AHC123AD,118 (935265563118) |
Active | 74AHC123AD |
SO16 (SOT109-1) |
SOT109-1 |
SO-SOJ-REFLOW
SO-SOJ-WAVE WAVE_BG-BD-1 |
SOT109-1_118 |
| 74AHC123APW | 74AHC123APW,118 (935265564118) |
Active | AHC123A |
TSSOP16 (SOT403-1) |
SOT403-1 |
SSOP-TSSOP-VSO-WAVE
|
SOT403-1_118 |
| 74AHCT123ABQ | 74AHCT123ABQ,115 (935285425115) |
Active | AT123A |
DHVQFN16 (SOT763-1) |
SOT763-1 | SOT763-1_115 | |
| 74AHCT123AD | 74AHCT123AD,118 (935265561118) |
Active | 74AHCT123AD |
SO16 (SOT109-1) |
SOT109-1 |
SO-SOJ-REFLOW
SO-SOJ-WAVE WAVE_BG-BD-1 |
SOT109-1_118 |
| 74AHCT123APW | 74AHCT123APW,118 (935265562118) |
Active | AHT123A |
TSSOP16 (SOT403-1) |
SOT403-1 |
SSOP-TSSOP-VSO-WAVE
|
SOT403-1_118 |
All type numbers in the table below are discontinued.
| Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
|---|---|---|---|---|---|---|---|
| 74AHC123AD | 74AHC123AD,112 (935265563112) |
Withdrawn / End-of-life | 74AHC123AD |
SO16 (SOT109-1) |
SOT109-1 |
SO-SOJ-REFLOW
SO-SOJ-WAVE WAVE_BG-BD-1 |
SOT109-1_112 |
| 74AHC123APW | 74AHC123APW,112 (935265564112) |
Withdrawn / End-of-life | AHC123A |
TSSOP16 (SOT403-1) |
SOT403-1 |
SSOP-TSSOP-VSO-WAVE
|
Not available |
Environmental information
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| 74AHC123ABQ | 74AHC123ABQ,115 | 74AHC123ABQ |
|
|
| 74AHC123AD | 74AHC123AD,118 | 74AHC123AD |
|
|
| 74AHC123APW | 74AHC123APW,118 | 74AHC123APW |
|
|
| 74AHCT123ABQ | 74AHCT123ABQ,115 | 74AHCT123ABQ |
|
|
| 74AHCT123AD | 74AHCT123AD,118 | 74AHCT123AD |
|
|
| 74AHCT123APW | 74AHCT123APW,118 | 74AHCT123APW |
|
|
All type numbers in the table below are discontinued.
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| 74AHC123AD | 74AHC123AD,112 | 74AHC123AD |
|
|
| 74AHC123APW | 74AHC123APW,112 | 74AHC123APW |
|
|
Documentation (18)
| File name | Title | Type | Date |
|---|---|---|---|
| 74AHC_AHCT123A | Dual retriggerable monostable multivibrator with reset | Data sheet | 2024-02-28 |
| 001aae521 | Block diagram: 74AHC123ABQ, 74AHC123AD, 74AHC123APW, 74AHCT123ABQ, 74AHCT123AD, 74AHCT123APW | Block diagram | 2009-11-03 |
| SOT763-1 | 3D model for products with SOT763-1 package | Design support | 2019-10-03 |
| SOT109-1 | 3D model for products with SOT109-1 package | Design support | 2020-01-22 |
| SOT403-1 | 3D model for products with SOT403-1 package | Design support | 2020-01-22 |
| ahc123a | ahc123a IBIS model | IBIS model | 2018-05-18 |
| ahct123a | ahct123a IBIS model | IBIS model | 2018-05-18 |
| Nexperia_package_poster | Nexperia package poster | Leaflet | 2020-05-15 |
| DHVQFN16_SOT763-1_mk | plastic, dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 0.85 mm body | Marcom graphics | 2017-01-28 |
| SO16_SOT109-1_mk | plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.35 mm body | Marcom graphics | 2017-01-28 |
| TSSOP16_SOT403-1_mk | plastic, thin shrink small outline package; 16 leads; 0.65 mm pitch; 5 mm x 4.4 mm x 1.1 mm body | Marcom graphics | 2017-01-28 |
| SOT763-1 | plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 1 mm body | Package information | 2023-05-11 |
| SOT109-1 | plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm body | Package information | 2023-11-07 |
| SOT403-1 | plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.2 mm body | Package information | 2023-11-08 |
| SO-SOJ-REFLOW | Footprint for reflow soldering | Reflow soldering | 2009-10-08 |
| SO-SOJ-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
| WAVE_BG-BD-1 | Wave soldering profile | Wave soldering | 2021-09-08 |
| SSOP-TSSOP-VSO-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
Support
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Models
| File name | Title | Type | Date |
|---|---|---|---|
| SOT763-1 | 3D model for products with SOT763-1 package | Design support | 2019-10-03 |
| SOT109-1 | 3D model for products with SOT109-1 package | Design support | 2020-01-22 |
| SOT403-1 | 3D model for products with SOT403-1 package | Design support | 2020-01-22 |
| ahc123a | ahc123a IBIS model | IBIS model | 2018-05-18 |
| ahct123a | ahct123a IBIS model | IBIS model | 2018-05-18 |
Ordering, pricing & availability
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