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Nexperia USA Inc. 74HCT273BQ-Q100X
- Part No.:
- 74HCT273BQ-Q100X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74HCT273BQ-Q100X.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,028
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Product details
Overview
74HCT273BQ-Q100 from Nexperia is an automotive-grade octal positive-edge-triggered D-type flip-flop with synchronous data capture and asynchronous master reset (MR). It operates across -40 °C to +125 °C, supports 4.5 V to 5.5 V supply, delivers 15 ns typical propagation delay at VCC = 4.5 V, and features TTL-compatible inputs for direct interfacing with legacy logic. It is used in automotive body control modules for synchronizing sensor data streams before CAN transmission.
For engineers reviewing the 74HCT273BQ-Q100 datasheet, 74HCT273BQ-Q100 pinout, 74HCT273BQ-Q100 application, or 74HCT273BQ-Q100 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, DHVQFN20 package with side-wettable flanks for AOI, MR-active-Low timing behavior, and guaranteed setup/hold times of 12 ns/3 ns at 4.5 V.
Technical Context
This device implements eight independent edge-triggered D flip-flops sharing a common clock (CP) and master reset (MR) input. Each flip-flop captures the state of its Dn input on the LOW-to-HIGH transition of CP, provided setup and hold time requirements are met. The MR input forces all Qn outputs LOW asynchronously, overriding clock and data.
Input levels conform to TTL thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), enabling direct connection to 5 V microcontrollers and legacy peripherals. Internal clamp diodes allow safe interface to voltages exceeding VCC when current-limiting resistors are used.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V automotive logic rails and stable operation under load dump conditions. |
| Propagation Delay (tpd) | 16 ns (typ) at VCC = 4.5 V - Enables reliable sampling of signals up to 30 MHz clock frequency in synchronous control paths. |
| Set-up Time (tsu) | 12 ns (max) at VCC = 4.5 V - Defines minimum data stability window before CP rising edge for deterministic state capture. |
| Hold Time (th) | 3 ns (max) at VCC = 4.5 V - Specifies shortest duration Dn must remain stable after CP rising edge to avoid metastability. |
| Output Drive | ±4.0 mA (VOH/VOL) at VCC = 4.5 V - Sufficient to drive multiple 74-series inputs or small LED indicators without buffering. |
| Operating Temperature | -40 °C to +125 °C - Qualified for under-hood automotive environments including engine control units and lighting controllers. |
| AEC-Q100 Grade | Grade 1 - Certified for automotive applications requiring full temperature range reliability and extended lifetime validation. |
Pinout & Package
DHVQFN20 package (SOT764-1), 2.5 × 4.5 × 0.85 mm body, no leads, thermal-enhanced construction with side-wettable flanks for automated optical inspection (AOI) of solder joints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Master Reset input | Asynchronous active-LOW signal that forces all eight Q outputs LOW regardless of CP or D states. |
| 2–9, 12–19 (Q0–Q7, D0–D7) | Flip-flop outputs / data inputs | Eight parallel D-inputs and corresponding Q-outputs; pin mapping follows functional grouping (Q4/D3, Q3/D4, etc.) per DHVQFN layout. |
| 10 (GND) | Ground reference | Primary 0 V return path; exposed thermal pad (pin 10) must be left floating or connected to GND per design guidelines. |
| 11 (CP) | Positive-edge clock input | LOW-to-HIGH transition triggers simultaneous latching of all eight D inputs into respective Q outputs. |
| 20 (VCC) | Power supply | Single 4.5–5.5 V supply rail; internal regulation not required; decoupling capacitor essential near pin 20. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max at 4.5–5.5 V - Eliminates need for level shifters when interfacing with 5 V MCUs or legacy peripherals. |
| Side-wettable flanks | SOT764-1 package geometry enables automated optical inspection of solder joint integrity - critical for zero-defect automotive manufacturing. |
| Asynchronous master reset | MR pin asserts all Q outputs LOW independently of clock - provides deterministic system initialization and fault recovery. |
| High noise immunity | CMOS process with hysteresis-free inputs achieves >400 mV noise margin at VCC = 5 V - robust against EMI in vehicle harness environments. |
| ESD protection | HBM >2000 V, CDM >1000 V - exceeds AEC-Q100 requirements for handling and assembly in automotive production lines. |
Applications
| Automotive Body Control Unit | Instrument Cluster Display Driver |
|---|---|
Use Scenario: Latching door lock status, window position, and mirror adjustment signals before multiplexed transmission over LIN bus. IC Role / Device Role / Timing Role: Synchronizes asynchronous mechanical switch inputs to a centralized 5 MHz system clock domain using MR for power-on reset. Use Value: Prevents metastability-induced spurious commands by guaranteeing single-cycle registration of safety-critical inputs. | Use Scenario: Buffering segmented LED driver enable signals in digital instrument clusters with variable refresh rates. IC Role / Device Role / Timing Role: Holds static display segment enables during dynamic SPI updates to prevent flicker or ghosting artifacts. Use Value: Provides glitch-free output state retention between microcontroller frame updates, eliminating visual anomalies. |
| Engine Control Module I/O Expansion | ADAS Camera Interface Synchronization |
Use Scenario: Extending GPIO count of a 32-bit MCU to manage solenoid drivers and diagnostic LEDs in compact ECU designs. IC Role / Device Role / Timing Role: Acts as parallel output latch synchronized to MCU's peripheral clock, with MR tied to watchdog timeout signal. Use Value: Enables fail-safe shutdown of actuators via hardware-level MR assertion, independent of firmware execution state. | Use Scenario: Aligning pixel data strobes from multiple camera sensors before feeding into image preprocessing ASIC. IC Role / Device Role / Timing Role: Captures timestamp-aligned trigger edges from distributed camera modules using common CP sourced from central timing generator. Use Value: Reduces inter-sensor skew to <15 ns, meeting ISO 26262 ASIL-B timing constraints for stereo vision fusion. |
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 |
|---|---|---|---|
| SN74HCT273QPWRQ1 | TSSOP20 package (SOT360-1); identical electrical specs and AEC-Q100 Grade 1 qualification. | Larger footprint and lower thermal performance than DHVQFN20; less suitable for space-constrained under-hood modules. | Select when board reflow profile or test fixture compatibility favors TSSOP over QFN. |
| 74HCT273PW-Q100 | Same TSSOP20 package as SN74HCT273QPWRQ1; functionally identical to 74HCT273BQ-Q100 except for package and thermal resistance. | No side-wettable flanks - AOI of solder joints not supported; requires X-ray inspection for production traceability. | Prefer only if existing PCB layout uses TSSOP20 and AOI capability is not required. |
Compared with SN74HCT273QPWRQ1 and 74HCT273PW-Q100, the 74HCT273BQ-Q100 offers superior thermal dissipation (12.9 mW/K derating above 111 °C) and automated optical inspectability - critical advantages for high-reliability automotive modules operating at elevated ambient temperatures.
Availability
74HCT273BQ-Q100 is available at Aetrix Electronics and suitable for automotive body control units, instrument cluster displays, engine control module I/O expansion, and ADAS camera synchronization requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT273BQ-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, reliable discrete, logic, and MOSFET devices optimized for automotive, industrial, and consumer applications.
The 74HCT273BQ-Q100 belongs to Nexperia's automotive-qualified logic portfolio, designed specifically for robust signal synchronization and data latching in harsh-temperature electronic control units where AEC-Q100 compliance and long-term supply stability are mandatory.
FAQ
What is the maximum clock frequency supported by the 74HCT273BQ-Q100?
The 74HCT273BQ-Q100 supports a maximum clock frequency of 30 MHz at VCC = 4.5 V and CL = 50 pF, verified across -40 °C to +125 °C. At 5.0 V with reduced load (CL = 15 pF), it achieves 36 MHz. These values are measured under specified test conditions per Figure 5 in the official Nexperia datasheet Rev. 3 (2024).
Can the MR pin be left unconnected in a circuit?
No - the MR pin must be actively driven HIGH (via pull-up resistor or logic source) when not in use, as it is active-LOW and internally uncommitted. Leaving it floating risks unintended reset events due to noise coupling, especially in automotive EMI environments. A 10 kΩ pull-up to VCC is recommended per Nexperia application guidance.
Does the DHVQFN20 package require special PCB layout considerations?
Yes - the SOT764-1 package requires an exposed thermal pad (terminal 10) that must either remain electrically floating or be connected to GND with appropriate solder mask definition. Solder stencil aperture should be 50–70% open area to prevent voiding. Side-wettable flanks necessitate controlled solder paste volume and reflow profile to ensure AOI visibility of fillet geometry.
How does the 74HCT273BQ-Q100 differ from the 74HC273BQ-Q100?
The 74HCT273BQ-Q100 uses TTL-compatible input thresholds (VIH = 2.0 V min), while the 74HC273BQ-Q100 uses CMOS thresholds (VIH = 3.15 V min at VCC = 4.5 V). This makes the HCT version directly compatible with 5 V TTL/LS logic families without level shifting, whereas the HC version requires higher input drive strength or voltage translation in mixed-logic systems.
74HCT273BQ-Q100X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 36 MHz
- Max Propagation Delay @ V, Max CL:
- 30ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 5.2mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- 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)
74HCT273BQ-Q100X FAQ
1.How can I place an order for 74HCT273BQ-Q100X through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT273BQ-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 74HCT273BQ-Q100X reliable?
The price and inventory of 74HCT273BQ-Q100X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT273BQ-Q100X is usually 5 days.
3.What payment methods are accepted for 74HCT273BQ-Q100X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT273BQ-Q100X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT273BQ-Q100X?
74HCT273BQ-Q100X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT273BQ-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 74HCT273BQ-Q100X?
For technical support, including 74HCT273BQ-Q100X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT273BQ-Q100X requirements.
6.How does Aetrix verify that 74HCT273BQ-Q100X is sourced from the original manufacturer or authorized distributors?
All 74HCT273BQ-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 74HCT273BQ-Q100X meets industry standards.
7.What is the process for return or replacement of 74HCT273BQ-Q100X?
All 74HCT273BQ-Q100X units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT273BQ-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 74HCT273BQ-Q100X part is unused and in its original packaging.
Return procedure for 74HCT273BQ-Q100X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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