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NXP Semiconductors 74HCT74D,653
- Part No.:
- 74HCT74D,653
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT74D,653.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:13,385
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Product details
Overview
74HCT74D,653 from Nexperia is a dual positive-edge-triggered D-type flip-flop with independent asynchronous set (nSD) and reset (nRD) inputs, complementary Q/nQ outputs per section, TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), propagation delay of 18 ns typical (VCC = 4.5 V, CL = 50 pF), and operation across -40 °C to +125 °C in SO14 (SOT108-1) package. It serves as a synchronous storage element in digital control logic, clock domain synchronization, and state machine sequencing.
For engineers reviewing the 74HCT74D,653 datasheet, 74HCT74D,653 pinout, 74HCT74D,653 application, or 74HCT74D,653 equivalent, this device is selected for reliable edge-triggered data latching in mixed-voltage industrial controllers, where TTL-level compatibility with 5 V microcontrollers and robust noise immunity are required.
Technical Context
The 74HCT74D,653 implements two independent D-type flip-flops sharing no internal coupling - each features separate D, CP, SD, RD, Q, and nQ terminals. Its Schmitt-trigger clock input ensures stable triggering even with slow-rising or noisy clock edges, while clamp diodes on all inputs allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Functionally, it operates on LOW-to-HIGH clock transitions only; asynchronous set and reset override clock action and force Q to HIGH or LOW respectively when asserted low. The device complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V), supports 5 V ±10 % supply, and delivers symmetrical output drive (±4 mA VOH/VOL at VCC = 4.5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible input thresholds, CMOS output drive, 5 V nominal operation |
| Supply Voltage Range | 4.5 V to 5.5 V - Ensures interoperability with standard 5 V TTL and mixed-signal systems |
| Propagation Delay (tpd) | 18 ns typ (VCC = 4.5 V, CL = 50 pF) - Enables reliable operation up to 22 MHz maximum clock frequency |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - Guarantees clean recognition of 5 V TTL logic levels without level shifting |
| Output Drive Strength | ±4 mA at VOH/VOL - Sufficient to drive multiple 74-series inputs or small capacitive loads directly |
| Operating Temperature | -40 °C to +125 °C - Qualified for under-hood automotive modules and industrial motor drives |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - Robust handling during PCB assembly and field service |
Pinout & Package
74HCT74D,653 is supplied in SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | nRD (asynchronous reset) | Active-LOW direct reset - forces nQ = HIGH, Q = LOW regardless of clock or data state |
| 2, 12 | nD (data input) | Stores value on next valid clock edge if setup/hold times met; unaffected by asynchronous controls when inactive |
| 3, 11 | nCP (clock input) | Positive-edge-triggered - Schmitt-trigger input tolerates slow rise/fall times; triggers sampling only on LOW-to-HIGH transition |
| 4, 10 | nSD (asynchronous set) | Active-LOW direct set - forces nQ = LOW, Q = HIGH regardless of clock or data state |
| 5, 9 | nQ (true output) | Complementary to Q; mirrors stored D value after clock edge or asynchronous set/reset assertion |
| 6, 8 | nQ (complement output) | Inverted version of Q; enables direct access to both logic states without external inverters |
| 7 | GND | Reference ground for all I/O and internal circuitry; must be low-impedance connection |
| 14 | VCC | Primary power supply (4.5–5.5 V); decoupling capacitor (100 nF) recommended near pin |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH ≥ 2.0 V / VIL ≤ 0.8 V at 5 V supply - Eliminates need for level translators when interfacing with legacy 5 V MCU peripherals |
| Schmitt-trigger clock input | Hysteresis ≥ 0.4 V - Rejects noise and slow edges on clock lines, preventing false triggering in electrically noisy environments |
| Asynchronous set/reset per section | Independent nSD/nRD pins per flip-flop - Enables deterministic initialization and fault recovery without clock dependency |
| High noise immunity | Typical noise margin > 1.2 V at VCC = 5 V - Maintains logic integrity in industrial settings with EMI from motors or switching supplies |
| Wide temperature range | -40 °C to +125 °C operation - Validated for use in engine control units, power converters, and outdoor infrastructure |
Applications
| Industrial PLC I/O Expansion | Digital Power Supply Sequencing |
|---|---|
|
Use Scenario: Latching status signals from isolated sensor inputs before transmission to main controller via SPI or parallel bus. IC Role / Device Role / Timing Role: Dual-edge-triggered storage element synchronizing asynchronous sensor events to system clock domain. Use Value: Prevents metastability in multi-clock-domain systems; eliminates need for external synchronizer chains. |
Use Scenario: Controlling enable timing of multiple DC-DC converter rails with precise power-up order and hold-off intervals. IC Role / Device Role / Timing Role: State-holding element in discrete sequencer logic, driven by supervisor IC reset signals and manual override switches. Use Value: Provides deterministic, glitch-free rail enable/disable control without software intervention or FPGA resources. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
|
Use Scenario: Debouncing mechanical switch inputs (e.g., door lock/unlock buttons) and storing actuator command state across ignition cycles. IC Role / Device Role / Timing Role: Synchronous latch capturing switch closures on clock edge, with asynchronous reset tied to ignition-on signal. Use Value: Reduces firmware polling load; enables hardware-based edge detection and state retention during low-power sleep modes. |
Use Scenario: Capturing and holding trigger conditions from analog comparators or logic analyzers before readout by host processor. IC Role / Device Role / Timing Role: Edge-sensitive capture register freezing transient events for post-processing analysis. Use Value: Enables single-shot acquisition without continuous CPU monitoring; supports deterministic timestamp alignment with system clock. |
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 |
|---|---|---|---|
| SN74HCT74DR (Texas Instruments) | Identical logic function, same SO14 package, but rated only to +85 °C; lower ESD rating (HBM 2000 V vs. Nexperia's >2000 V) | Limited to commercial/industrial ambient environments; unsuitable for under-hood automotive use | Select when cost sensitivity outweighs extended temperature requirement and full automotive qualification is not needed. |
| 74LVC74AD,118 (Nexperia) | LVCMOS family: 1.65–3.6 V supply, 3.3 V logic levels, 3.5 ns tpd (VCC = 3.3 V); no TTL input compatibility | Designed for low-voltage portable electronics; incompatible with 5 V systems without level translation | Choose for battery-powered or modern 3.3 V FPGA/microcontroller interfaces where speed and power efficiency are prioritized. |
Compared with SN74HCT74DR and 74LVC74AD,118, the 74HCT74D,653 uniquely combines 5 V TTL compatibility, -40 °C to +125 °C operation, and industry-standard SO14 packaging - making it the preferred choice for ruggedized 5 V control logic where drop-in reliability and wide thermal margin are mandatory.
Availability
74HCT74D,653 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, digital power supply sequencers, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT74D,653 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 high-volume, high-reliability logic, analog, and MOSFET components, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The 74HCT74D,653 belongs to Nexperia's 74HCT logic family - engineered for seamless integration into 5 V TTL-based systems requiring robust noise immunity, wide temperature operation, and pin-for-pin compatibility with legacy 74-series devices.
FAQ
Can 74HCT74D,653 operate reliably at 4.5 V supply?
Yes. The 74HCT74D,653 is fully specified from 4.5 V to 5.5 V per JEDEC JESD8C. At 4.5 V, it delivers VIH ≥ 2.0 V, VOL ≤ 0.4 V at 4 mA sink, and tpd ≤ 53 ns (max) - meeting all timing and voltage thresholds for robust 5 V TTL interface operation.
Does the SO14 package support reflow soldering per JEDEC J-STD-020?
Yes. The SOT108-1 package used in 74HCT74D,653 is qualified for standard Pb-free reflow profiles (peak 260 °C, 10 s max). Its gull-wing leads and 1.27 mm pitch comply with IPC-7351B footprint standards and withstand thermal cycling per JESD22-A104.
What is the minimum pulse width required on nSD or nRD for reliable asynchronous assertion?
The minimum active pulse width for nSD or nRD is 8 ns (typical) and 9 ns (max) at VCC = 4.5 V, as specified in Table 8. This ensures complete internal state override without race conditions, even under worst-case process/voltage/temperature corners.
Is there a recommended bypass capacitor value for VCC pin?
A 100 nF X7R ceramic capacitor placed within 5 mm of the VCC (pin 14) and GND (pin 7) is recommended. This value suppresses high-frequency supply noise generated by simultaneous output switching, maintaining stable internal bias and minimizing propagation delay variation.
74HCT74D,653 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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:
- 59 MHz
- Max Propagation Delay @ V, Max CL:
- 44ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 4mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 40 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74HCT74D,653 FAQ
1.How can I place an order for 74HCT74D,653 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT74D,653 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 74HCT74D,653 reliable?
The price and inventory of 74HCT74D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT74D,653 is usually 5 days.
3.What payment methods are accepted for 74HCT74D,653?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT74D,653 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT74D,653?
74HCT74D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT74D,653 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 74HCT74D,653?
For technical support, including 74HCT74D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT74D,653 requirements.
6.How does Aetrix verify that 74HCT74D,653 is sourced from the original manufacturer or authorized distributors?
All 74HCT74D,653 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 74HCT74D,653 meets industry standards.
7.What is the process for return or replacement of 74HCT74D,653?
All 74HCT74D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT74D,653, 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 74HCT74D,653 part is unused and in its original packaging.
Return procedure for 74HCT74D,653:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT74D,653 Tags
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