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Nexperia USA Inc. 74HCT109D-Q100J
- Part No.:
- 74HCT109D-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT109D-Q100J.pdf
- Description:
- IC FF JK TYPE DUAL 1BIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:146
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Product details
Overview
74HCT109D-Q100 from Nexperia is an automotive-qualified dual positive-edge-triggered JK flip-flop with asynchronous set (SD) and reset (RD) inputs, complementary Q/Q̅ outputs per section, TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), and operation over -40 °C to +125 °C. It supports D-type configuration via J–K tie, toggles on clock edge, and enables robust timing control in engine control units and ADAS domain controllers.
For engineers reviewing the 74HCT109D-Q100 datasheet, 74HCT109D-Q100 pinout, 74HCT109D-Q100 application, or 74HCT109D-Q100 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, 5 V ±10% supply range, 27 MHz maximum clock frequency at 4.5 V, Schmitt-trigger clock input for noise immunity, and SO16 package compatibility with legacy PCB footprints.
Technical Context
This device implements two independent edge-triggered JK latches sharing no internal logic-each has dedicated J, K, CP, SD, RD, Q, and Q̅ terminals. The asynchronous SD/RD inputs override clocked behavior and assert LOW-active reset/set regardless of CP state, enabling hard-wired system initialization or fault recovery.
Its TTL-level input compatibility (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 5 V) ensures direct interfacing with legacy 5 V microcontrollers and peripheral drivers without level-shifting. The Schmitt-trigger clock input provides hysteresis (typ. 0.4 V at VCC = 5 V), tolerating slow-rising signals up to 100 ns/V slew rate without metastability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across automotive battery transients (e.g., load dump, cold crank). |
| Max Clock Frequency | 27 MHz at VCC = 4.5 V - Supports real-time sampling in motor phase sequencing and sensor data capture. |
| Propagation Delay (tpd) | 20 ns to 53 ns (VCC = 4.5 V, CL = 50 pF) - Enables sub-50 ns state updates for deterministic control loops. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - Guarantees reliable recognition of standard TTL logic levels from MCUs and ASICs. |
| Operating Temperature | -40 °C to +125 °C - Validated for under-hood placement in powertrain and chassis modules. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - Meets automotive assembly line ESD requirements without external protection. |
| Power Dissipation | CPD = 22 pF - Enables accurate dynamic power estimation (PD = CPD × VCC² × fi × N) for thermal budgeting. |
Pinout & Package
74HCT109D-Q100 uses the SO16 plastic small outline package (SOT109-1), 3.9 mm body width, 16-pin gull-wing lead form, JEDEC MS-012 compliant, with 1.27 mm pitch and exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1RD, 15RD | Asynchronous reset (active LOW) | Forces Q = 0, Q̅ = 1 independently of clock; used for emergency shutdown or power-on clear. |
| 1SD, 11SD | Asynchronous set (active LOW) | Forces Q = 1, Q̅ = 0 independently of clock; enables fast state preloading in safety-critical paths. |
| 1CP, 12CP | Clock input (LOW-to-HIGH edge) | Triggers synchronous J/K evaluation only on rising edge; Schmitt-trigger input rejects noise below 0.4 V hysteresis. |
| 1J, 14J / 1K, 13K | Synchronous data inputs | J = 1, K = 0 → set; J = 0, K = 1 → reset; J = K = 1 → toggle; J = K = 0 → hold - full JK functionality. |
| 1Q, 10Q / 2Q, 6Q | True output (Q) | Active-high registered output; drives CMOS/TTL loads up to 4 mA sink/source at VCC = 4.5 V. |
| 1Q̅, 9Q̅ / 2Q̅, 7Q̅ | Complement output (Q̅) | Inverted output referenced to same flip-flop; eliminates need for external inverters in feedback paths. |
| VCC (16) | Positive supply | Must be decoupled locally with 100 nF ceramic capacitor; supports 4.5–5.5 V range only (not 2–6 V like HC variant). |
| GND (8) | Ground reference | Low-impedance return path for all I/O and internal logic; requires solid plane connection for EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from -40 °C to +125 °C ambient, including temperature cycling, HTOL, and ESD stress. |
| TTL-compatible input levels | Accepts standard 5 V TTL outputs directly-no level shifter needed when interfacing with legacy MCU GPIO or bus drivers. |
| Schmitt-trigger clock input | Provides 0.4 V typical hysteresis, allowing reliable triggering even with noisy or slow-rising clock signals (e.g., from RC oscillators). |
| Dual independent flip-flops | Enables parallel state storage-e.g., one section for PWM phase control, the other for fault latch status-without resource contention. |
| Asynchronous set/reset per section | Permits hardware-initiated state override (e.g., watchdog timeout forcing safe state) without CPU intervention or clock dependency. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
|
Use Scenario: Capturing camshaft/crankshaft position edges for precise ignition timing calculation. IC Role / Device Role / Timing Role: Dual-edge synchronizer converting analog comparator outputs into clean, metastability-free digital pulses aligned to ECU clock domain. Use Value: Eliminates race conditions between sensor signals and CPU sampling clocks, ensuring ±1° crank angle resolution under vibration. |
Use Scenario: Latching radar object detection alerts before CAN transmission to avoid missed events during bus arbitration. IC Role / Device Role / Timing Role: Asynchronous event capture register holding critical safety flags until host processor reads them via SPI interface. Use Value: Prevents loss of time-critical collision warnings during microcontroller interrupt latency or low-power sleep modes. |
| Electric Power Steering (EPS) | Body Control Module (BCM) |
|
Use Scenario: Debouncing torque sensor switch transitions to prevent false assist activation during mechanical chatter. IC Role / Device Role / Timing Role: Synchronized edge detector feeding filtered switch state into EPS MCU's torque decision logic. Use Value: Reduces false torque commands by >99.9% compared to RC-based debouncing, improving steering feel consistency. |
Use Scenario: Storing door lock/unlock command states during LIN bus communication gaps caused by master polling delays. IC Role / Device Role / Timing Role: Non-volatile state latch retaining user intent across LIN frame boundaries and transient bus faults. Use Value: Ensures lock actuation completes even if LIN master misses one polling cycle-no re-press required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual JK flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC109D-Q100 | CMOS input thresholds (VIH = 3.15 V min at VCC = 4.5 V); wider 2.0–6.0 V supply range. | Requires level-shifting when interfacing with TTL outputs; better suited for mixed-voltage systems with 3.3 V logic domains. | Select when operating outside 4.5–5.5 V range or integrating with 3.3 V peripherals. |
| SN74LV109APWRE4 | Lower 2.0–5.5 V supply range; LV logic family with 1.67 V VIH min at VCC = 3.3 V; TSSOP16 package only. | Optimized for 3.3 V systems; lacks AEC-Q100 qualification; not rated for 125 °C ambient. | Select for cost-sensitive non-automotive industrial controls where extended temperature is not required. |
Compared with 74HC109D-Q100, the 74HCT109D-Q100 offers guaranteed TTL interoperability at 5 V but sacrifices supply flexibility; versus SN74LV109APWRE4, it trades lower voltage support for automotive-grade reliability and high-temperature operation-critical for powertrain and chassis modules.
Availability
74HCT109D-Q100 is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, electric power steering systems, and body control modules requiring stable component supply across automotive production lifecycles.
Supply support for 74HCT109D-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 for automotive, industrial, and consumer markets.
The 74HCT109D-Q100 belongs to Nexperia's automotive-qualified logic portfolio, designed specifically for timing-critical control functions in harsh environments where AEC-Q100 compliance and extended temperature operation are mandatory.
FAQ
Can 74HCT109D-Q100 operate at 3.3 V supply?
No. The 74HCT109D-Q100 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, input thresholds fall outside guaranteed logic recognition-VIH minimum drops to 1.5 V (insufficient for 3.3 V TTL), and propagation delays exceed specification. Use 74LVC109 or 74LV109 for 3.3 V systems.
What is the minimum pulse width required on SD/RD inputs?
The minimum active pulse width for SD or RD is 16 ns at VCC = 4.5 V (per Table 7). This ensures reliable asynchronous assertion across temperature and voltage extremes. Pulses shorter than this may fail to trigger set/reset, especially at -40 °C or high VCC.
Does the Schmitt-trigger clock input affect setup/hold timing?
No-the Schmitt-trigger applies only to noise filtering on the CP pin; setup (tsu = 18 ns) and hold (th = 3 ns) times for J/K inputs are referenced to the internal clock edge derived after hysteresis. These values remain unchanged from non-Schmitt variants.
Is there a recommended decoupling strategy for SO16 layout?
Place a 100 nF X7R ceramic capacitor between VCC (pin 16) and GND (pin 8) within 3 mm of the package, using short, wide traces. Add a 4.7 μF bulk capacitor nearby on the board. Avoid splitting ground under the IC-use a solid ground plane beneath the SO16 footprint to minimize switching noise coupling.
74HCT109D-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Set(Preset) and Reset
- Type:
- JK Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 81 MHz
- Max Propagation Delay @ V, Max CL:
- 35ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
74HCT109D-Q100J FAQ
1.How can I place an order for 74HCT109D-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT109D-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 74HCT109D-Q100J reliable?
The price and inventory of 74HCT109D-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT109D-Q100J is usually 5 days.
3.What payment methods are accepted for 74HCT109D-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT109D-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT109D-Q100J?
74HCT109D-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT109D-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 74HCT109D-Q100J?
For technical support, including 74HCT109D-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT109D-Q100J requirements.
6.How does Aetrix verify that 74HCT109D-Q100J is sourced from the original manufacturer or authorized distributors?
All 74HCT109D-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 74HCT109D-Q100J meets industry standards.
7.What is the process for return or replacement of 74HCT109D-Q100J?
All 74HCT109D-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT109D-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 74HCT109D-Q100J part is unused and in its original packaging.
Return procedure for 74HCT109D-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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