My Inquiry
My Account
Nexperia USA Inc. 74AHC123ABQ-Q100X
- Part No.:
- 74AHC123ABQ-Q100X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Multivibrators
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
74AHC123ABQ-Q100X.pdf
- Description:
- IC MULTIVIBRATOR 5.1NS 16DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74AHC123ABQ-Q100 from Nexperia is a dual retriggerable monostable multivibrator with independent reset, designed for precise pulse generation and timing extension in automotive systems. It operates from 2.0 V to 5.5 V, supports -40 °C to +125 °C ambient range, features overvoltage-tolerant inputs up to 5.5 V, and delivers programmable output pulse widths via external REXT/CEXT networks - used in engine control unit (ECU) signal conditioning and ADAS sensor interface timing.
For engineers reviewing the 74AHC123ABQ-Q100 datasheet, 74AHC123ABQ-Q100 pinout, 74AHC123ABQ-Q100 application, or 74AHC123ABQ-Q100 equivalent, key selection criteria include retriggerable pulse extension capability, AEC-Q100 Grade 1 qualification, DHVQFN16 package thermal performance, and Schmitt-trigger input noise immunity in mixed-voltage automotive domains.
Technical Context
This IC implements two independent monostable circuits, each with dual edge-triggered inputs (nA: negative-edge, nB: positive-edge), direct asynchronous reset (nRD), and complementary outputs (nQ/nQ). Pulse width tW is determined by external REXT and CEXT components per channel, with typical values ranging from 100 ns to 1.15 ms depending on component selection and supply voltage.
Each circuit supports retriggering during an active output pulse to extend duration indefinitely (up to 100 % duty factor), while nRD provides immediate termination of the output pulse on a LOW-going edge. All inputs include Schmitt-trigger action for high noise immunity, and input levels are CMOS-compatible for the AHC variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0 V to 5.5 V - enables interoperability across 3.3 V and 5 V automotive subsystems without level shifters. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive applications per AEC-Q100 Grade 1. |
| Pulse Width Range | 100 ns to 1.15 ms - set externally via REXT (1 kΩ–5 kΩ) and CEXT (28 pF–0.1 μF), enabling flexible timing resolution. |
| Propagation Delay | 5.1 ns (typ, VCC = 5 V, CL = 15 pF) - ensures fast response to trigger/reset events in real-time control loops. |
| Input Voltage Tolerance | Up to 5.5 V - allows safe interfacing with higher-voltage signals in mixed-rail environments. |
| Output Drive Strength | ±8 mA (VOH/VOL at VCC = 4.5 V) - sufficient to drive multiple CMOS loads or small capacitive traces directly. |
| Power Dissipation Capacitance | 57 pF - enables accurate dynamic power estimation (PD = CPD × VCC² × fi) for thermal design. |
Pinout & Package
DHVQFN16 package (SOT763-1), 2.5 × 3.5 × 0.85 mm body, side-wettable flanks for AOI-compatible solder joint inspection. Exposed thermal pad (terminal 1) is electrically isolated; may be left floating or connected to GND per layout requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND (thermal pad) | Non-electrical thermal interface; no mandatory connection, but grounding improves thermal dissipation. |
| 2 | 2REXT/CEXT | Shared node for external resistor and capacitor to set Channel 2 pulse width. |
| 3 | 2B | Positive-edge triggered input for Channel 2 - initiates or extends output pulse on rising edge. |
| 4 | 2CEXT | Capacitor connection for Channel 2 - used with 2REXT/CEXT to define timing network. |
| 5 | 2RD | Direct reset input for Channel 2 - terminates active pulse on LOW-going edge. |
| 6 | 2Q | Active LOW output for Channel 2 - complements 2Q; used for inverted logic timing control. |
| 7 | 2Q | Active HIGH output for Channel 2 - primary timing output; synchronized with retrigger/reset events. |
| 8 | 1Q | Active HIGH output for Channel 1 - primary timing output; independent of Channel 2 operation. |
| 9 | 1Q | Active LOW output for Channel 1 - complements 1Q; supports differential or enable/disable signaling. |
| 10 | 1RD | Direct reset input for Channel 1 - terminates active pulse on LOW-going edge, asynchronous to clock. |
| 11 | 1CEXT | Capacitor connection for Channel 1 - used with 1REXT/CEXT to define timing network. |
| 12 | 1B | Positive-edge triggered input for Channel 1 - initiates or extends output pulse on rising edge. |
| 13 | 1REXT/CEXT | Shared node for external resistor and capacitor to set Channel 1 pulse width. |
| 14 | GND | Signal ground reference - must be low-impedance connection for stable timing and noise immunity. |
| 15 | 2A | Negative-edge triggered input for Channel 2 - initiates or extends output pulse on falling edge. |
| 16 | VCC | Supply voltage input - bypassed locally with 100 nF ceramic capacitor to minimize switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Retriggerable monostable operation | Enables indefinite pulse extension via repeated nA/nB triggers - critical for variable-duration windowing in sensor sampling. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use from -40 °C to +125 °C, including temperature cycling, HTOL, and ESD stress tests. |
| Schmitt-trigger inputs | Provides >0.8 V hysteresis on all inputs - rejects noise spikes common in engine bay or motor drive environments. |
| Overvoltage-tolerant inputs | Accepts up to 5.5 V regardless of VCC - eliminates need for external clamping diodes when interfacing with 5 V microcontrollers. |
| Dual independent channels | Allows concurrent timing functions (e.g., PWM dead-time insertion + fault pulse stretching) without cross-talk. |
Applications
| Engine Control Unit Timing | ADAS Sensor Interface |
|---|---|
|
Use Scenario: Generating precise, extendable gate delay windows for fuel injector driver sequencing and knock sensor blanking. IC Role / Device Role / Timing Role: Dual-channel monostable providing synchronized, retriggerable pulse windows for actuator enable and sensor acquisition gating. Use Value: Enables adaptive timing adjustment based on real-time RPM/load conditions without MCU intervention. |
Use Scenario: Conditioning radar/LiDAR echo pulses with variable blanking periods to suppress near-field interference. IC Role / Device Role / Timing Role: Retriggerable pulse stretcher that extends detection window only when valid return signals are present. Use Value: Reduces false positives by dynamically adapting blanking duration to object distance and velocity. |
| Body Control Module Reset Coordination | Infotainment Power Sequencing |
|
Use Scenario: Synchronizing wake-up sequences across door module MCUs using shared CAN-triggered timing pulses. IC Role / Device Role / Timing Role: Dual monostable generating matched, independently resettable enable pulses for distributed power rails. Use Value: Ensures deterministic power-up order and avoids bus contention during cold-start recovery. |
Use Scenario: Managing display backlight ramp-up and audio amplifier enable timing to eliminate pop/click artifacts. IC Role / Device Role / Timing Role: Independent pulse generators with adjustable rise/fall timing for staggered subsystem activation. Use Value: Eliminates audible transients by decoupling power-on timing between analog and digital domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar monostable multivibrator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHCT123ABQ-Q100 | TTL-compatible inputs (VIH = 2.0 V min), same package and timing specs - requires 4.5–5.5 V supply for guaranteed logic thresholds. | Better suited for legacy 5 V-only systems with TTL-level microcontrollers or FPGAs lacking CMOS input thresholds. | Select when interfacing with older 5 V logic families where AHC's 3.3 V–5.5 V CMOS thresholds risk marginal operation. |
| SN74LVC123APWR | Industrial-grade (not AEC-Q100), 1.65–3.6 V supply, smaller TSSOP-16 package - lacks automotive qualification and extended temperature range. | Applicable in non-automotive embedded systems where cost and board space are prioritized over automotive reliability. | Choose only for consumer or industrial designs not requiring AEC-Q100 compliance or operation above 85 °C. |
Compared with 74AHCT123ABQ-Q100, this AHC variant offers wider supply flexibility and lower input threshold sensitivity; versus SN74LVC123APWR, it provides certified automotive robustness and extended thermal margin at the cost of voltage-range restriction.
Availability
74AHC123ABQ-Q100 is available at Aetrix Electronics and suitable for engine control units, ADAS sensor interfaces, and body control modules requiring stable component supply across automotive production lifecycles.
Supply support for 74AHC123ABQ-Q100 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert focused on essential efficiency-enhancing components, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and mobile markets.
This device belongs to Nexperia's AEC-Q100-qualified automotive logic portfolio, engineered specifically for timing-critical subsystems where reliability, noise immunity, and extended temperature operation are mandatory.
FAQ
What is the minimum external capacitor value supported for stable pulse width generation?
The datasheet specifies no lower limit for CEXT, but practical stability requires ≥28 pF to ensure predictable timing with typical PCB stray capacitance. At 28 pF and 2 kΩ REXT, pulse width is 100–200 ns (VCC = 4.5–5.5 V); smaller values increase sensitivity to parasitic effects and reduce repeatability.
Can both channels operate with different REXT/CEXT values simultaneously?
Yes - Channel 1 uses pins 13 (1REXT/CEXT) and 14 (1CEXT), while Channel 2 uses pins 2 (2REXT/CEXT) and 4 (2CEXT). These are fully independent nodes, allowing distinct timing constants per channel for asymmetric pulse generation or staggered delays.
Is the exposed thermal pad (Pin 1) required to be soldered and grounded?
No - the datasheet explicitly states Pin 1 is not electrically connected and has no mechanical or electrical requirement for soldering. If soldered, the land must remain floating or connect to GND; grounding improves thermal resistance by ~15 °C/W but is optional for most automotive applications.
How does the retrigger time (trtrig) affect maximum achievable pulse extension rate?
trtrig is 1.2 μs (typ, VCC = 5 V), defining the shortest interval between successive retrigger events that reliably extend the output pulse. Below this interval, the internal state machine may not register the edge, limiting maximum retrigger frequency to ~800 kHz for continuous extension.
74AHC123ABQ-Q100X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHC
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Monostable
- Independent Circuits:
- 2
- Schmitt Trigger Input:
- No
- Propagation Delay:
- 5.1 ns
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2 V ~ 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DHVQFN (2.5x3.5)
74AHC123ABQ-Q100X FAQ
1.How can I place an order for 74AHC123ABQ-Q100X through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHC123ABQ-Q100X on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74AHC123ABQ-Q100X reliable?
The price and inventory of 74AHC123ABQ-Q100X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC123ABQ-Q100X is usually 5 days.
3.What payment methods are accepted for 74AHC123ABQ-Q100X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHC123ABQ-Q100X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHC123ABQ-Q100X?
74AHC123ABQ-Q100X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHC123ABQ-Q100X order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74AHC123ABQ-Q100X?
For technical support, including 74AHC123ABQ-Q100X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC123ABQ-Q100X requirements.
6.How does Aetrix verify that 74AHC123ABQ-Q100X is sourced from the original manufacturer or authorized distributors?
All 74AHC123ABQ-Q100X products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74AHC123ABQ-Q100X meets industry standards.
7.What is the process for return or replacement of 74AHC123ABQ-Q100X?
All 74AHC123ABQ-Q100X units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC123ABQ-Q100X, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74AHC123ABQ-Q100X part is unused and in its original packaging.
Return procedure for 74AHC123ABQ-Q100X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AHC123ABQ-Q100X Tags
-
SN74LVC1G123DCUR
Texas Instruments
-
CD4047BM96
Texas Instruments
-
SN74LVC1G123DCTR
Texas Instruments
-
CD74HC221M96
Texas Instruments
-
CD14538BE
Texas Instruments
-
SN74LVC1G123YZPR
Texas Instruments
-
SN74LVC1G123DCUT
Texas Instruments
-
MC14538BDR2G
onsemi
-
74VHC123AMX
onsemi
-
LTC6993CS6-2#TRMPBF
Analog Devices Inc.
-
LTC6993CS6-3#TRMPBF
Analog Devices Inc.
-
LTC6993CS6-1#TRMPBF
Analog Devices Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
