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Nexperia USA Inc. 74HC574BQ-Q100X
- Part No.:
- 74HC574BQ-Q100X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74HC574BQ-Q100X.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,787
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Product details
Overview
74HC574BQ-Q100 from Nexperia is an automotive-grade 8-bit positive-edge-triggered D-type flip-flop with 3-state outputs, designed for bus-oriented data latching in automotive control units. It operates across 2.0 V to 6.0 V supply, supports -40 °C to +125 °C ambient, and features independent clock (CP) and active-low output enable (OE) inputs enabling precise timing control and bus isolation.
For engineers reviewing the 74HC574BQ-Q100 datasheet, 74HC574BQ-Q100 pinout, 74HC574BQ-Q100 application, or 74HC574BQ-Q100 equivalent, this device is selected for high-reliability digital interface buffering, ECU register staging, and CAN/LIN subsystem data synchronization where AEC-Q100 Grade 1 qualification, low propagation delay (14 ns @ VCC=6.0 V), and DHVQFN20 thermal performance are critical.
Technical Context
This IC implements eight independent D-type flip-flops sharing a common clock and 3-state output enable, with each stage capturing D-input states on the LOW-to-HIGH CP transition while meeting setup/hold times (tsu = 10 ns, th = 5 ns @ VCC=6.0 V). Its CMOS input structure provides TTL-compatible thresholds only in the 74HCT variant; the 74HC574BQ-Q100 uses true CMOS-level inputs (VIH ≥ 4.2 V @ VCC=6.0 V).
Output behavior is strictly controlled by OE: a HIGH forces all Q0–Q7 into high-impedance OFF-state without affecting internal flip-flop states, enabling multi-drop bus arbitration. The DHVQFN20 package (SOT764-1) includes side-wettable flanks for AOI-compatible solder joint inspection - a requirement for automotive PCB assembly traceability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - Enables direct interfacing with 3.3 V and 5 V logic domains without level shifters. |
| Propagation Delay (tpd) | 14 ns (max) @ VCC=6.0 V, CL=50 pF - Supports >24 MHz system clock rates in synchronous data capture paths. |
| Set-up / Hold Time | tsu = 10 ns, th = 5 ns @ VCC=6.0 V - Defines minimum D-input stability window before/after CP edge for reliable sampling. |
| Output Drive Strength | ±7.8 mA @ VCC=6.0 V - Sufficient to drive 50 pF loads across automotive harness lengths with clean signal integrity. |
| Operating Temperature | -40 °C to +125 °C - Qualified per AEC-Q100 Grade 1 for under-hood engine control module deployment. |
| Power Dissipation Capacitance | CPD = 22 pF - Used to calculate dynamic power: PD = CPD × VCC² × fi × N, critical for thermal budgeting in sealed ECUs. |
| ESD Robustness | HBM >2000 V, CDM >1000 V - Ensures resilience against handling and board-level electrostatic events during manufacturing and service. |
Pinout & Package
DHVQFN20 package (SOT764-1): 2.5 mm × 4.5 mm × 0.85 mm body, no leads, 20 terminals, side-wettable flanks for automated optical inspection. Thermal pad (terminal 1 index area) may be left floating or connected to GND per layout requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground node; not electrically required to be soldered but recommended for thermal and noise performance. |
| 2–9 | D0–D7 | Asynchronous parallel data inputs; sampled on rising CP edge and held until next valid clock. |
| 10 | CP | Clock input - triggers synchronous capture of Dn inputs on LOW-to-HIGH transition only. |
| 11 | OE | Active-low 3-state output enable - HIGH disables all Q outputs without altering internal state. |
| 12–19 | Q0–Q7 | Registered, non-inverting outputs - tri-stated when OE = HIGH; otherwise mirror Dn after CP edge. |
| 20 | VCC | Positive supply rail - must be decoupled locally with 100 nF ceramic capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from -40 °C to +125 °C with full reliability testing (HTOL, TC, UHAST, etc.). |
| CMOS-level input compatibility | VIH ≥ 4.2 V @ VCC=6.0 V ensures robust noise margin against supply ripple in noisy vehicle electrical systems. |
| Side-wettable flanks (SWF) | Enables automated optical inspection of solder joints on bottom-terminated QFN - mandatory for IATF 16949-compliant production. |
| Independent output enable | OE controls all eight outputs simultaneously without disturbing stored data - essential for time-multiplexed bus sharing. |
| Clamp diode protection | Input diodes allow safe interfacing to voltages exceeding VCC using current-limiting resistors, simplifying mixed-voltage design. |
Applications
| Engine Control Unit (ECU) Data Staging | Body Control Module (BCM) I/O Expansion |
|---|---|
Use Scenario: Capturing sensor ADC results or actuator command words prior to CAN transmission in real-time engine timing loops. IC Role / Device Role / Timing Role: Synchronous 8-bit latch holding sampled values stable across variable CPU interrupt latency windows. Use Value: Eliminates metastability risk during CPU-to-peripheral handoff and enables deterministic read timing at up to 24 MHz. |
Use Scenario: Expanding microcontroller GPIO count to drive multiple LED indicators, relays, and door lock solenoids. IC Role / Device Role / Timing Role: Parallel output expander with 3-state capability allowing shared bus access among multiple peripheral drivers. Use Value: Reduces MCU pin count pressure while maintaining independent control over each output via OE gating. |
| ADAS Camera Interface Buffer | Infotainment System Display Timing Controller |
Use Scenario: Isolating MIPI CSI-2 parallel data lanes between image sensor and SoC during hot-plug or reset sequences. IC Role / Device Role / Timing Role: Bus-isolated register holding last valid frame header or configuration byte during link retraining. Use Value: Prevents spurious signals from propagating to downstream logic during transient link faults, improving system robustness. |
Use Scenario: Latching display resolution, color depth, and sync polarity settings from MCU before LCD panel initialization. IC Role / Device Role / Timing Role: Configuration register staging buffer ensuring atomic write of multi-bit display control words. Use Value: Guarantees glitch-free display startup by presenting fully assembled control data on a single clock edge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT574BQ-Q100 | TTL-compatible inputs (VIH = 2.0 V min @ VCC=4.5 V); identical timing and packaging. | Better suited for legacy 5 V microcontrollers with standard TTL output levels. | Select when interfacing with older MCUs lacking CMOS-level drive strength or voltage tolerance. |
| SN74LVC574AQDRQ1 | Lower VCC range (1.65–3.6 V); faster tpd (5.4 ns @ 3.3 V); different pinout (SOIC/TSSOP only). | Optimized for modern low-voltage ADAS SoCs; not pin-compatible with DHVQFN20 footprint. | Choose for 3.3 V-only designs requiring sub-6 ns latency and JEDEC-standard SOIC-20 compatibility. |
Compared with 74HC574BQ-Q100, the 74HCT574BQ-Q100 eases interface to 5 V TTL sources without level shifters, while SN74LVC574AQDRQ1 delivers higher speed at lower voltage but sacrifices drop-in replacement capability and automotive thermal performance in DHVQFN.
Availability
74HC574BQ-Q100 is available at Aetrix Electronics and suitable for engine control units, body electronics modules, and ADAS camera interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC574BQ-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 delivering high-performance logic, discrete, and MOSFET solutions optimized for automotive, industrial, and mobile applications with emphasis on reliability and efficiency.
This device belongs to Nexperia's automotive-qualified HC/HCT logic family, engineered specifically for robust digital interfacing in harsh environments where AEC-Q100 compliance, wide voltage operation, and thermal resilience are mandatory.
FAQ
What is the maximum clock frequency supported by the 74HC574BQ-Q100?
The 74HC574BQ-Q100 supports a maximum clock frequency of 35 MHz at VCC = 6.0 V and CL = 50 pF, verified per Table 7 of the datasheet. At 4.5 V supply, fmax drops to 30 MHz. These values assume proper PCB layout with minimized trace inductance and local decoupling.
Can the 74HC574BQ-Q100 be used with a 3.3 V microcontroller?
Yes - its 2.0 V to 6.0 V supply range and CMOS input thresholds (VIH ≥ 2.1 V @ VCC = 4.5 V) ensure compatibility with 3.3 V MCUs. However, VIH at VCC = 3.3 V is ~2.2 V (interpolated), so verify that the MCU's VOH meets this minimum under load conditions.
Is the thermal pad (terminal 1 index area) required to be grounded?
No - the datasheet explicitly states terminal 1 is not a functional ground pin and has no electrical or mechanical soldering requirement. If soldered, it must remain floating or connect to GND; do not tie it to any other net to avoid parasitic coupling.
How does the 74HC574BQ-Q100 differ from the 74HC574D-Q100 (SO20)?
The 74HC574BQ-Q100 uses DHVQFN20 (SOT764-1) packaging - 2.5 × 4.5 mm, leadless, with side-wettable flanks - whereas the 74HC574D-Q100 uses SO20 (SOT163-1), a 7.5 mm wide gull-wing package. Both share identical logic, timing, and qualification, but differ in thermal resistance, board space, and assembly inspection method.
74HC574BQ-Q100X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 133 MHz
- Max Propagation Delay @ V, Max CL:
- 26ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 8 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:
- 20-DHVQFN (4.5x2.5)
74HC574BQ-Q100X FAQ
1.How can I place an order for 74HC574BQ-Q100X through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC574BQ-Q100X 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 74HC574BQ-Q100X reliable?
The price and inventory of 74HC574BQ-Q100X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC574BQ-Q100X is usually 5 days.
3.What payment methods are accepted for 74HC574BQ-Q100X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC574BQ-Q100X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC574BQ-Q100X?
74HC574BQ-Q100X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC574BQ-Q100X 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 74HC574BQ-Q100X?
For technical support, including 74HC574BQ-Q100X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC574BQ-Q100X requirements.
6.How does Aetrix verify that 74HC574BQ-Q100X is sourced from the original manufacturer or authorized distributors?
All 74HC574BQ-Q100X 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 74HC574BQ-Q100X meets industry standards.
7.What is the process for return or replacement of 74HC574BQ-Q100X?
All 74HC574BQ-Q100X units undergo pre-shipment inspection (PSI). If there is an issue with 74HC574BQ-Q100X, 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 74HC574BQ-Q100X part is unused and in its original packaging.
Return procedure for 74HC574BQ-Q100X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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