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Nexperia USA Inc. 74AHC123APW-Q100J
- Part No.:
- 74AHC123APW-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Multivibrators
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHC123APW-Q100J.pdf
- Description:
- IC MULTIVIBRATOR 5.1NS 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,667
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Product details
Overview
74AHC123APW-Q100 from Nexperia is a dual retriggerable monostable multivibrator with independent reset inputs, designed for precise pulse generation and extension in automotive timing circuits. 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 alignment.
For engineers reviewing the 74AHC123APW-Q100 datasheet, 74AHC123APW-Q100 pinout, 74AHC123APW-Q100 application, or 74AHC123APW-Q100 equivalent, this device enables flexible pulse stretching in mixed-voltage automotive subsystems, supports Schmitt-trigger input noise immunity, and requires attention to external timing component selection, reset edge polarity, and TSSOP16 thermal derating above 91 °C.
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 set by CEXT and REXT per channel, with typical values ranging from 100 ns to 1.15 ms depending on component values and supply voltage.
Retriggering extends the active output period without resetting the timer; a LOW-going edge on nRD terminates the output pulse immediately. All inputs include Schmitt-trigger action for robust noise rejection, and input levels are CMOS-compatible (VIH ≥ 3.85 V at VCC = 5.5 V, VIL ≤ 1.65 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0 V to 5.5 V - supports direct interfacing with 3.3 V and 5 V logic domains in automotive ECUs. |
| Operating Temperature | -40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood automotive applications. |
| Pulse Width Range | 100 ns to 1.15 ms - programmable per channel using external REXT (1–5 kΩ) and CEXT (no upper limit). |
| Propagation Delay | 5.1 ns (typ) at VCC = 5 V, CL = 15 pF - ensures tight timing control in high-speed trigger chains. |
| Input Voltage Tolerance | Inputs tolerant to 5.5 V regardless of VCC - enables level translation between 3.3 V controllers and 5 V peripherals. |
| Output Drive Strength | ±8 mA at VCC = 4.5 V - sufficient to drive multiple CMOS loads or small capacitive traces directly. |
| Power Dissipation Cap. | 57 pF - used to calculate dynamic power: PD = CPD × VCC² × fi + Σ(CL × VCC² × fo). |
Pinout & Package
TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, body width 4.4 mm, lead pitch 0.65 mm, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A | Negative-edge triggered input (Channel 1) | Starts or extends Channel 1 output pulse on HIGH-to-LOW transition. |
| 1B | Positive-edge triggered input (Channel 1) | Starts or extends Channel 1 output pulse on LOW-to-HIGH transition. |
| 1RD | Direct reset input (Channel 1) | Terminates Channel 1 output pulse on LOW-going edge; also accepts positive-edge reset. |
| 1Q | Active HIGH output (Channel 1) | Complementary to 1Q; goes HIGH during monostable pulse period. |
| 1Q | Active LOW output (Channel 1) | Complementary to 1Q; goes LOW during monostable pulse period. |
| 1CEXT | External capacitor connection (Channel 1) | Connects to timing capacitor CEXT1; must be externally grounded for stable operation. |
| 1REXT/CEXT | Shared resistor/capacitor node (Channel 1) | Connects to timing resistor REXT1 and CEXT1; sets base pulse width tW1. |
| GND | Ground reference (Pin 8) | Primary 0 V reference for all internal circuitry and external timing components. |
| 2A | Negative-edge triggered input (Channel 2) | Independent trigger for Channel 2; identical function to 1A. |
| 2B | Positive-edge triggered input (Channel 2) | Independent trigger for Channel 2; identical function to 1B. |
| 2RD | Direct reset input (Channel 2) | Independent reset for Channel 2; identical function to 1RD. |
| 2Q | Active LOW output (Channel 2) | Complementary to 2Q; identical timing behavior to 1Q. |
| 2Q | Active HIGH output (Channel 2) | Complementary to 2Q; identical timing behavior to 1Q. |
| 2CEXT | External capacitor connection (Channel 2) | Connects to timing capacitor CEXT2; must be externally grounded. |
| 2REXT/CEXT | Shared resistor/capacitor node (Channel 2) | Connects to timing resistor REXT2 and CEXT2; sets base pulse width tW2. |
| VCC | Supply voltage (Pin 16) | Power rail for both channels; decoupling capacitor required near Pin 16. |
Key Features
| Feature | Design Value |
|---|---|
| Retriggerable monostable operation | Enables indefinite pulse extension via repeated triggers - critical for variable-duration enable signals in motor drivers. |
| Asynchronous direct reset | Guarantees sub-15 ns termination of output pulses (at VCC = 5 V), supporting fail-safe shutdown in safety-critical paths. |
| Overvoltage-tolerant inputs | Accepts 0–5.5 V input signals regardless of VCC (2.0–5.5 V), eliminating level shifters in mixed-supply clusters. |
| Schmitt-trigger inputs | Provides >0.8 V hysteresis (typ) on all inputs, rejecting EMI-induced glitches in noisy automotive harness environments. |
| AEC-Q100 Grade 1 qualification | Validated for continuous operation at +125 °C ambient, meeting requirements for powertrain and chassis control modules. |
Applications
| Engine Control Unit Timing | ADAS Sensor Interface |
|---|---|
|
Use Scenario: Generating synchronized enable pulses for fuel injector drivers based on crankshaft position sensor edges. IC Role / Device Role / Timing Role: Dual-channel monostable provides independent, retriggerable gate timing for sequential injection control and camshaft sync validation. Use Value: Pulse width programmability (via REXT/CEXT) allows precise dwell time tuning across engine RPM ranges without firmware changes. |
Use Scenario: Conditioning radar sensor wake-up pulses and managing timeout windows for object detection validity. IC Role / Device Role / Timing Role: Monostable extends short sensor interrupts into stable enable windows; reset input synchronizes to host processor readiness signals. Use Value: Retrigger capability maintains valid window during burst-mode radar sampling; overvoltage tolerance simplifies interface to 5 V sensor outputs. |
| Body Control Module (BCM) | Infotainment System Power Sequencing |
|
Use Scenario: Debouncing door lock/unlock switch inputs and generating clean, glitch-free actuator enable signals. IC Role / Device Role / Timing Role: Each monostable channel handles one switch input; Schmitt-trigger inputs suppress contact bounce; reset clears latched states. Use Value: Input hysteresis eliminates false triggers from mechanical switch noise; dual-channel integration reduces BOM count vs discrete RC+logic solutions. |
Use Scenario: Controlling power-up sequencing of display backlight, audio amplifier, and MCU subsystems after ignition-on event. IC Role / Device Role / Timing Role: Channels generate staggered enable delays (e.g., 100 ms → 200 ms → 500 ms) using different REXT/CEXT values. Use Value: Programmable delay resolution down to ~100 ns enables fine-grained power rail ramp control, reducing inrush current peaks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar monostable multivibrator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHCT123APW-Q100 | TTL-compatible inputs (VIH = 2.0 V min), otherwise identical pinout, timing, and packaging. | Better suited for legacy 5 V TTL systems where input thresholds must match older microcontrollers or logic families. | Select when interfacing with 5 V-only controllers lacking CMOS-level input sensitivity; not recommended for 3.3 V domains. |
| SN74LVC123APWR | Lower VCC range (1.65–5.5 V), non-automotive grade, no AEC-Q100 qualification, same TSSOP16 footprint. | Limited to industrial or consumer applications; lacks automotive temperature and reliability validation. | Use only in non-safety-critical, non-under-hood designs where cost is prioritized over automotive qualification. |
Compared with 74AHCT123APW-Q100, this part offers higher noise immunity and wider voltage compatibility but requires CMOS-level input drive; versus SN74LVC123APWR, it trades broader voltage flexibility for guaranteed automotive-grade performance and thermal robustness.
Availability
74AHC123APW-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 74AHC123APW-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 technologies, delivering high-performance logic, analog, and MOSFET solutions optimized for automotive, industrial, and mobile markets.
The 74AHC123A-Q100 belongs to Nexperia's automotive-qualified logic portfolio, engineered specifically for deterministic timing functions in harsh-environment vehicle subsystems where reliability, thermal stability, and AEC-Q100 compliance are mandatory.
FAQ
What is the minimum external capacitor value required for stable operation?
No minimum CEXT value is specified - the device functions with CEXT = 0 pF (i.e., no capacitor), though pulse width becomes highly sensitive to stray capacitance. For predictable timing, CEXT ≥ 28 pF is recommended per channel, with typical use cases employing 10 nF to 0.1 μF. Grounding pins 6 and 14 (2CEXT and 1CEXT) externally to GND minimizes noise-induced jitter.
Can both channels operate independently with different timing components?
Yes - Channel 1 uses pins 14 (1CEXT) and 15 (1REXT/CEXT); Channel 2 uses pins 6 (2CEXT) and 7 (2REXT/CEXT). Each pair supports independent REXT and CEXT values, enabling asymmetric pulse widths (e.g., 100 μs on Channel 1, 1 ms on Channel 2) without crosstalk or shared component constraints.
How does the reset input (nRD) interact with ongoing retriggering?
A LOW-going edge on nRD terminates the current output pulse immediately, overriding any pending retrigger events. Once reset, the channel remains inactive until the next valid trigger on nA or nB. The reset function is asynchronous and does not require synchronization with the clock or other inputs.
Is the TSSOP16 package suitable for reflow soldering in automotive PCB assembly?
Yes - the SOT403-1 (TSSOP16) package is qualified for standard lead-free reflow profiles (J-STD-020), including peak temperatures up to 260 °C. Its side-wettable flanks support automated optical inspection (AOI) of solder joints, ensuring process reliability in high-volume automotive manufacturing lines.
74AHC123APW-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- 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-TSSOP
74AHC123APW-Q100J FAQ
1.How can I place an order for 74AHC123APW-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHC123APW-Q100J 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 74AHC123APW-Q100J reliable?
The price and inventory of 74AHC123APW-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC123APW-Q100J is usually 5 days.
3.What payment methods are accepted for 74AHC123APW-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHC123APW-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHC123APW-Q100J?
74AHC123APW-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHC123APW-Q100J 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 74AHC123APW-Q100J?
For technical support, including 74AHC123APW-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC123APW-Q100J requirements.
6.How does Aetrix verify that 74AHC123APW-Q100J is sourced from the original manufacturer or authorized distributors?
All 74AHC123APW-Q100J 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 74AHC123APW-Q100J meets industry standards.
7.What is the process for return or replacement of 74AHC123APW-Q100J?
All 74AHC123APW-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC123APW-Q100J, 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 74AHC123APW-Q100J part is unused and in its original packaging.
Return procedure for 74AHC123APW-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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