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Nexperia USA Inc. 74AHCT74D-Q100J
- Part No.:
- 74AHCT74D-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74AHCT74D-Q100J.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,554
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Product details
Overview
74AHCT74D-Q100 from Nexperia is an automotive-qualified dual positive-edge-triggered D-type flip-flop with asynchronous set and reset (active LOW), TTL-level input compatibility, 14-pin SO14 package, and operation up to +125 °C - used for clock-synchronized data latching and state storage in engine control units and ADAS sensor interfaces.
For engineers reviewing the 74AHCT74D-Q100 datasheet, 74AHCT74D-Q100 pinout, 74AHCT74D-Q100 application, or 74AHCT74D-Q100 equivalent, this page delivers verified functional identity, SO14 pin mapping, AEC-Q100 Grade 1 qualification status, propagation delay (≤9.5 ns at VCC = 5 V, CL = 15 pF), and direct TTL-level interface capability without level-shifting.
Technical Context
This device implements two independent edge-triggered D flip-flops sharing no internal logic; each features fully asynchronous active-LOW set (1SD/2SD) and reset (1RD/2RD), complementary Q/Q̅ outputs, and Schmitt-trigger clock inputs enabling robust timing with slow-rising signals. The TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V) ensure interoperability with legacy 5 V logic families.
It operates across -40 °C to +125 °C with supply voltage fixed at 4.5–5.5 V, supports 115 MHz maximum clock frequency (CL = 15 pF), and guarantees setup/hold times of 5.0 ns / 0 ns respectively - enabling reliable sampling of high-speed control signals in automotive powertrain modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74AHCT - TTL-compatible CMOS, enabling direct interfacing with 5 V LSTTL without level shifters |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard automotive 5 V rail; excludes 3.3 V operation |
| Propagation Delay (tpd) | ≤9.5 ns (VCC = 5 V, CL = 15 pF) - ensures sub-10 ns data-to-output timing for real-time control loops |
| Max Clock Frequency (fmax) | 115 MHz (VCC = 5 V, CL = 15 pF) - supports high-speed sampling in radar preprocessing stages |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - guarantees noise immunity and compatibility with 5 V TTL output swings |
| Ambient Temp Range | -40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood automotive deployment |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets automotive board-level ESD robustness requirements |
Pinout & Package
14-pin plastic small outline package (SO14), body width 3.9 mm, SOT108-1 footprint, lead pitch 1.27 mm, RoHS-compliant, surface-mountable with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1RD | Asynchronous reset (Channel 1) | Active-LOW; forces 1Q = LOW, 1Q̅ = HIGH independent of clock - used for hardware-initiated state clearing |
| 1D | Data input (Channel 1) | Sampled on rising edge of 1CP; determines next-state value of 1Q - connects to sensor data or control bus |
| 1CP | Clock input (Channel 1) | Positive-edge triggered; Schmitt-triggered for tolerance to slow rise/fall times - accepts noisy microcontroller clocks |
| 1SD | Asynchronous set (Channel 1) | Active-LOW; forces 1Q = HIGH, 1Q̅ = LOW independent of clock - enables fail-safe assertion |
| 1Q | True output (Channel 1) | Primary registered output; synchronized to 1CP edge - drives downstream logic or driver stages |
| 1Q̅ | Complement output (Channel 1) | Inverted copy of 1Q; eliminates need for external inverters in toggle or differential signaling paths |
| GND | Ground reference | 0 V return path for all internal circuitry and I/O - must be low-impedance for stable timing |
| 2Q̅ | Complement output (Channel 2) | Independent inverted output for second flip-flop - supports dual-channel buffering or phase-splitting |
| 2Q | True output (Channel 2) | Second registered output; electrically isolated from Channel 1 - enables parallel data capture |
| 2SD | Asynchronous set (Channel 2) | Active-LOW set for Channel 2 only - allows independent initialization of dual control paths |
| 2CP | Clock input (Channel 2) | Independent rising-edge clock; may be tied to 1CP or driven separately - supports dual-clock domains |
| 2D | Data input (Channel 2) | Independent data path; sampled on 2CP edge - used for redundant signal capture or time-multiplexed inputs |
| 2RD | Asynchronous reset (Channel 2) | Active-LOW reset for Channel 2 only - enables selective channel reset without disturbing Channel 1 |
| VCC | Supply voltage | +4.5 V to +5.5 V power rail; decoupling capacitor required near Pin 14 to suppress switching noise |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for -40 °C to +125 °C operation with lifetime reliability testing - suitable for engine bay ECUs |
| TTL-level input compatibility | VIH ≥ 2.0 V, VIL ≤ 0.8 V at 5 V supply - eliminates external level translators when interfacing with legacy 5 V microcontrollers |
| Schmitt-trigger clock inputs | Hysteresis on CP pins enables clean edge detection on slow or noisy clock signals - reduces metastability risk |
| Asynchronous set/reset per channel | Dedicated SD/RD pins per flip-flop allow independent initialization or fault recovery without clock dependency |
| Complementary Q/Q̅ outputs | Both true and inverted outputs available per channel - simplifies design of toggle circuits and differential drivers |
Applications
| Engine Control Unit (ECU) Timing Logic | Radar Signal Sampling Interface |
|---|---|
|
Use Scenario: Capturing synchronized crankshaft/camshaft position pulses in real time for fuel injection timing. IC Role / Device Role / Timing Role: Dual-channel D flip-flop latches two independent sensor edges on a common clock, providing glitch-free position state to MCU. Use Value: 9.5 ns propagation delay and 5 ns setup time ensure accurate pulse capture at 10+ MHz engine speeds without timing violations. |
Use Scenario: Conditioning high-frequency IF signals from 77 GHz radar receivers before ADC sampling. IC Role / Device Role / Timing Role: Edge-triggered register holds intermediate samples during clock domain crossing between RF front-end and digital baseband. Use Value: Complementary Q/Q̅ outputs enable differential clocking of subsequent sample-and-hold stages, improving SNR by 3 dB. |
| ADAS Camera Frame Sync Generator | Automotive CAN Transceiver Control Logic |
|
Use Scenario: Generating precise frame synchronization pulses for multi-camera fusion systems in autonomous driving stacks. IC Role / Device Role / Timing Role: Dual flip-flop implements a 2-bit synchronous counter to divide master pixel clock and generate row/column sync strobes. Use Value: Independent asynchronous reset per channel allows immediate frame restart on error detection - critical for safety-critical vision pipelines. |
Use Scenario: Managing TXEN/RXEN enable states and fault flag latching in ISO 11898-2 compliant CAN transceivers. IC Role / Device Role / Timing Role: Stores transceiver mode configuration and captures transient bus fault events (e.g., dominant timeout) for diagnostic logging. Use Value: AEC-Q100 qualification and 125 °C operation guarantee reliable state retention during thermal stress in junction box deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHC74D-Q100 | CMOS-level inputs (VIH ≥ 3.85 V at 5.5 V); higher noise margin but incompatible with TTL outputs | Requires level translation when interfacing with legacy 5 V TTL peripherals | Select when system uses only CMOS logic or needs higher VIH noise immunity |
| SN74LVC74AQPWRQ1 | 3.3 V-only operation (1.65–3.6 V); lower propagation delay (≤5.8 ns), no TTL input compatibility | Not usable in 5 V automotive domains; requires separate 3.3 V rail and level shifters for 5 V interfaces | Select only in new 3.3 V automotive designs with no 5 V legacy interface requirements |
Compared with 74AHC74D-Q100, the 74AHCT74D-Q100 provides guaranteed TTL-level input recognition essential for mixed-voltage automotive systems, while SN74LVC74AQPWRQ1 offers faster speed at the cost of 5 V incompatibility - making the AHCT variant the only drop-in replacement for legacy 5 V control logic.
Availability
74AHCT74D-Q100 is available at Aetrix Electronics and suitable for engine control units, radar signal conditioning, ADAS camera sync generation, and CAN transceiver control requiring stable component supply across automotive production lifecycles.
Supply support for 74AHCT74D-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 specializing in high-performance, high-reliability logic, analog, and discrete components - headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.
The 74AHCT series targets automotive and industrial applications demanding AEC-Q100 qualification, wide temperature operation, and robust 5 V TTL interoperability - designed specifically for mission-critical control logic where interface compatibility and long-term supply stability are mandatory.
FAQ
Is 74AHCT74D-Q100 compatible with 3.3 V logic systems?
No - the 74AHCT74D-Q100 is specified only for 4.5 V to 5.5 V operation per its Recommended Operating Conditions table. Its TTL-input thresholds require ≥4.5 V VCC to guarantee VIH ≥ 2.0 V and proper recognition of logic HIGH. Using it below 4.5 V risks undefined behavior and violates AEC-Q100 qualification limits.
Can the set and reset inputs be left unconnected?
No - 1SD, 1RD, 2SD, and 2RD are active-LOW asynchronous inputs with no internal pull-ups. Leaving them floating risks unintended resets or sets due to noise coupling. Each must be actively driven HIGH (e.g., via 10 kΩ pull-up to VCC) or controlled by system logic to ensure deterministic startup and operation.
What is the maximum capacitive load supported on Q outputs?
The device is characterized up to 50 pF load capacitance (CL) in Dynamic Characteristics tables, with propagation delay and fmax values specified at both 15 pF and 50 pF. Driving >50 pF increases tpd, reduces fmax, and may cause output ringing or timing violations - external buffering is recommended for loads exceeding 50 pF.
Does the SO14 package (SOT108-1) support automatic optical inspection (AOI)?
No - only the DHVQFN14 (SOT762-1) variant features Side-Wettable Flanks explicitly enabling AOI of solder joints. The SO14 package lacks this geometry; visual or X-ray inspection is required for solder joint verification in automated assembly lines.
74AHCT74D-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 140 MHz
- Max Propagation Delay @ V, Max CL:
- 8.8ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 2 µA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74AHCT74D-Q100J FAQ
1.How can I place an order for 74AHCT74D-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT74D-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 74AHCT74D-Q100J reliable?
The price and inventory of 74AHCT74D-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT74D-Q100J is usually 5 days.
3.What payment methods are accepted for 74AHCT74D-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT74D-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT74D-Q100J?
74AHCT74D-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT74D-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 74AHCT74D-Q100J?
For technical support, including 74AHCT74D-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT74D-Q100J requirements.
6.How does Aetrix verify that 74AHCT74D-Q100J is sourced from the original manufacturer or authorized distributors?
All 74AHCT74D-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 74AHCT74D-Q100J meets industry standards.
7.What is the process for return or replacement of 74AHCT74D-Q100J?
All 74AHCT74D-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT74D-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 74AHCT74D-Q100J part is unused and in its original packaging.
Return procedure for 74AHCT74D-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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