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Nexperia USA Inc. 74HC74D,652
- Part No.:
- 74HC74D,652
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HC74D,652.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,413
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Product details
Overview
74HC74D,652 from Nexperia is a dual positive-edge-triggered D-type flip-flop with independent asynchronous set (nSD) and reset (nRD) inputs, complementary Q and Q̅ outputs per section, 2.0–6.0 V supply range, and operation up to +125 °C in SO14 (SOT108-1) package. It stores data on LOW-to-HIGH clock transitions with 13 ns typical propagation delay at VCC = 6.0 V and supports industrial control logic, synchronous counters, and register file staging.
For engineers reviewing the 74HC74D,652 datasheet, 74HC74D,652 pinout, 74HC74D,652 application, or 74HC74D,652 equivalent, this device serves as a foundational building block for edge-sensitive storage in digital state machines, clock-domain synchronization, and metastability-mitigated latching where CMOS-level input compatibility and rail-to-rail output swing are required.
Technical Context
The 74HC74D,652 implements two independent D-flip-flop cells sharing no internal coupling-each with dedicated nD, nCP, nSD, nRD, nQ, and nQ̅ terminals. Its Schmitt-trigger clock input ensures robust timing margin against slow-rising clock edges, while clamp diodes enable safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Functionally, it operates strictly on the LOW-to-HIGH transition of nCP; nSD and nRD are active-low asynchronous controls overriding clocked behavior. The device complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V), supports latch-up immunity >100 mA (JESD78 Class II Level B), and meets HBM ESD >2000 V and CDM >1000 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2.0–6.0 V - Enables direct interface with 3.3 V and 5 V logic families without level shifters. |
| Propagation delay (nCP → nQ) | 14 ns (typ) at VCC = 6.0 V - Supports reliable operation up to 28 MHz maximum clock frequency. |
| Set-up time (nD → nCP) | 13 ns (max) at VCC = 6.0 V - Defines minimum data stability window before clock edge for deterministic capture. |
| Hold time (nD → nCP) | 3 ns (min) - Ensures data integrity during clock transition; minimal hold requirement simplifies timing closure. |
| Output drive (VOH/VOL) | VOH ≥ 5.34 V / VOL ≤ 0.16 V at IO = ±5.2 mA, VCC = 6.0 V - Delivers rail-aligned switching with <0.33 V logic swing under load. |
| Input threshold (VIH/VIL) | VIH = 4.2 V / VIL = 1.8 V at VCC = 6.0 V - CMOS-compatible thresholds ensure noise margins >1.2 V. |
| Operating temperature | −40 °C to +125 °C - Qualified for under-hood automotive, industrial PLC, and high-reliability embedded control. |
Pinout & Package
74HC74D,652 is housed in a plastic small outline package (SO14, SOT108-1) with 14 leads, 3.9 mm body width, and standard 1.27 mm pitch. Pin 1 is marked by a notch or index area; the package is RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1RD | Asynchronous reset (Section 1) | Active-low override: forces 1Q = LOW regardless of clock or data; critical for power-on initialization. |
| 1D | Data input (Section 1) | Primary synchronous input sampled on rising nCP edge; determines next-state value of 1Q. |
| 1CP | Clock input (Section 1) | LOW-to-HIGH edge-triggered; Schmitt-triggered for tolerance to slow rise/fall times (>83 ns/V at VCC = 6.0 V). |
| 1SD | Asynchronous set (Section 1) | Active-low override: forces 1Q = HIGH independent of clock; used for presetting known states. |
| 1Q | True output (Section 1) | Complements 1Q̅; provides registered logic level synchronized to 1CP edge with defined tpd. |
| 1Q̅ | Inverted output (Section 1) | Complement of 1Q; enables direct implementation of toggle or JK-like behavior without external inversion. |
| GND | Ground reference | 0 V return path for all internal circuitry; must be low-impedance to maintain noise immunity. |
| 2Q̅ | Inverted output (Section 2) | Complement of 2Q; electrically isolated from Section 1 - allows independent dual-channel operation. |
| 2Q | True output (Section 2) | Registered output of second flip-flop; identical timing and drive specs as 1Q. |
| 2SD | Asynchronous set (Section 2) | Independent active-low set for Section 2; enables separate initialization of each channel. |
| 2CP | Clock input (Section 2) | Second independent clock input; supports dual-clock domain interfacing or staggered sampling. |
| 2D | Data input (Section 2) | Independent data path for Section 2; no shared resources with Section 1. |
| 2RD | Asynchronous reset (Section 2) | Independent active-low reset for Section 2; essential for fault recovery in redundant logic paths. |
| VCC | Supply voltage | 2.0–6.0 V primary power rail; decoupling capacitor (100 nF) recommended within 10 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger clock input | Enables reliable triggering with slow or noisy clock edges (Δt/ΔV ≥ 83 ns/V at VCC = 6.0 V), reducing need for external conditioning. |
| Asynchronous set/reset per section | Independent nSD/nRD pins allow per-channel forced state initialization without affecting the other flip-flop or requiring clock cycles. |
| CMOS-level input compatibility | VIH/VIL thresholds scale with VCC (e.g., VIH = 4.2 V at VCC = 6.0 V), ensuring interoperability across 3.3 V and 5 V systems. |
| Rail-to-rail output swing | VOH ≥ 5.34 V and VOL ≤ 0.16 V at full load (IO = ±5.2 mA) guarantee clean logic levels into capacitive or resistive loads. |
| High noise immunity | Input hysteresis + >1.2 V noise margin at VCC = 6.0 V suppresses false triggering in electrically noisy environments (e.g., motor drives). |
Applications
| Industrial PLC I/O Expansion | Digital Audio Clock Domain Crossing |
|---|---|
|
Use Scenario: Latching sensor status signals (e.g., limit switches, encoder Z-phase) into a microcontroller's GPIO port under variable EMI conditions. IC Role / Device Role / Timing Role: Dual D-flip-flop acts as a synchronized input sampler, using nCP driven by system clock and nSD/nRD for hardware-initiated state clearing. Use Value: Eliminates metastability risk via two-stage synchronizer implementation (using both sections), achieving MTBF >10⁹ hours at 10 MHz clock rate. |
Use Scenario: Aligning asynchronous audio sample clocks (e.g., SPDIF receiver bit clock) to a local master clock in a DAC controller. IC Role / Device Role / Timing Role: First section captures incoming clock edge; second section retimes the result to eliminate jitter accumulation across stages. Use Value: Reduces accumulated jitter by >40% compared to single-stage latching, enabling <1 ns RMS jitter transfer in 24-bit/192 kHz audio paths. |
| Automotive Body Control Module | Test Equipment Pattern Generator |
|
Use Scenario: Storing door lock/unlock command states from CAN message decoding logic prior to actuator driver activation. IC Role / Device Role / Timing Role: Each flip-flop holds one command bit (lock/unlock); nSD/nRD provide fail-safe reset on watchdog timeout or power brownout detection. Use Value: Guarantees deterministic output state during power transients (−40 °C to +125 °C), meeting ISO 16750-2 pulse test requirements. |
Use Scenario: Generating precise, repeatable test vectors for ASIC validation using programmable pattern memory. IC Role / Device Role / Timing Role: Cascaded 74HC74D devices form shift registers; nCP driven by precision function generator, nD fed from FPGA lookup table. Use Value: Achieves <±0.5 ns edge placement accuracy at 25 MHz due to matched tPLH/tPHL (14/15 ns typ), enabling sub-cycle timing verification. |
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 |
|---|---|---|---|
| 74HCT74D,653 | TTL-compatible inputs (VIH = 2.0 V min), same SO14 package and timing. | Better suited for mixed 5 V TTL/CMOS systems; higher input current (343 μA max) vs. 74HC74D's 1 μA leakage. | Select when interfacing legacy 74LS logic; avoid in battery-powered or high-impedance bias networks. |
| SN74LVC74APW | 3.3 V-only operation (1.65–3.6 V), lower tpd (5.5 ns typ), TSSOP14 package. | Optimized for modern low-voltage FPGAs and ARM-based controllers; not compatible with 5 V buses. | Choose for new 3.3 V designs requiring higher speed and smaller footprint; requires level translation for 5 V interfaces. |
Compared with 74HCT74D,653 and SN74LVC74APW, the 74HC74D,652 uniquely balances wide supply range (2–6 V), industrial temperature support, and CMOS input compatibility-making it the only option qualified for legacy 5 V systems requiring guaranteed −40 °C to +125 °C operation without voltage translation.
Availability
74HC74D,652 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body controllers, digital audio clock domain crossing, and test equipment pattern generation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC74D,652 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 delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in high-volume applications.
The 74HC74D,652 belongs to Nexperia's HC-series logic family, engineered for robustness in industrial and automotive environments where wide voltage operation, high noise immunity, and extended temperature qualification are mandatory.
FAQ
Can 74HC74D,652 operate reliably at 2.0 V supply?
Yes. The device is fully specified from 2.0 V to 6.0 V, with guaranteed functionality including tpd ≤ 220 ns, VIH ≥ 1.5 V, and VOL ≤ 0.5 V at VCC = 2.0 V and −40 °C to +85 °C. Propagation delay increases predictably with lower VCC, enabling ultra-low-power sleep-mode retention in battery-backed systems.
What is the purpose of the Schmitt-trigger action on the clock input?
The Schmitt-trigger on nCP provides hysteresis (~0.3 V at VCC = 4.5 V), allowing reliable edge detection even with slow-rising clock signals (e.g., RC-generated clocks or long PCB traces). This eliminates need for external signal conditioning and prevents multiple toggles due to noise near the logic threshold.
How does the asynchronous reset differ from synchronous reset in this device?
nRD asserts immediately-overriding clock and data to force nQ = LOW within tpd (max 51 ns at VCC = 6.0 V)-regardless of nCP state. Unlike synchronous reset, it requires no clock edge, making it essential for power-on initialization, fault recovery, and safety-critical state clearing where timing predictability is non-negotiable.
Is the SO14 package (SOT108-1) lead-free and RoHS-compliant?
Yes. The 74HC74D,652 in SO14 packaging uses lead-free terminations and complies with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The package material is halogen-free epoxy molding compound, and solder reflow profiles follow IPC/JEDEC J-STD-020 Rev. E for MSL 1 handling.
74HC74D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 82 MHz
- Max Propagation Delay @ V, Max CL:
- 37ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage - Supply:
- 2V ~ 6V
- 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
74HC74D,652 FAQ
1.How can I place an order for 74HC74D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC74D,652 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 74HC74D,652 reliable?
The price and inventory of 74HC74D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC74D,652 is usually 5 days.
3.What payment methods are accepted for 74HC74D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC74D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC74D,652?
74HC74D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC74D,652 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 74HC74D,652?
For technical support, including 74HC74D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC74D,652 requirements.
6.How does Aetrix verify that 74HC74D,652 is sourced from the original manufacturer or authorized distributors?
All 74HC74D,652 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 74HC74D,652 meets industry standards.
7.What is the process for return or replacement of 74HC74D,652?
All 74HC74D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC74D,652, 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 74HC74D,652 part is unused and in its original packaging.
Return procedure for 74HC74D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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