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Texas Instruments SN74HC273QDWRQ1
- Part No.:
- SN74HC273QDWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74HC273QDWRQ1.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,903
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Product details
Overview
SN74HC273QDWRQ1 from Texas Instruments is an automotive-qualified octal positive-edge-triggered D-type flip-flop with asynchronous active-low clear (CLR), operating from 2 V to 6 V, delivering 13 ns typical propagation delay at 5 V, ±4-mA output drive, and 160-µA max ICC - used in buffer/storage register circuits within engine control units and ADAS domain controllers.
For engineers reviewing the SN74HC273QDWRQ1 datasheet, SN74HC273QDWRQ1 pinout, SN74HC273QDWRQ1 application, or SN74HC273QDWRQ1 equivalent, key selection criteria include its AEC-Q100 qualification, SOIC-20 package, single-rail outputs, direct clear functionality, and compatibility with 5-V LSTTL load driving in safety-critical automotive timing and data latching systems.
Technical Context
This device implements eight independent D-type flip-flops sharing a common clock (CLK) and global asynchronous clear (CLR) input. Each flip-flop captures data on the rising edge of CLK only when CLR is high, with no effect on Q outputs during CLK high/low states.
It operates across −40°C to +125°C, supports 2–6 V supply, and meets automotive reliability requirements including AEC-Q100 Grade 1 qualification. Input thresholds scale with VCC, and output drive capability remains stable across voltage and temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - enables direct interface with 3.3-V and 5-V logic domains without level shifting |
| Propagation Delay (tpd) | 13 ns typical at VCC = 5 V - supports reliable operation up to 27 MHz clock frequency |
| Output Drive Strength | ±4 mA at VCC = 5 V - sufficient to drive 10 LSTTL loads directly |
| Quiescent Current (ICC) | 160 µA max - ensures low static power in always-on automotive modules |
| Input Leakage Current | 1 µA max - minimizes unintended current paths in high-impedance control lines |
| Operating Temperature | −40°C to +125°C - certified for under-hood and transmission control unit environments |
| Clear Function | Asynchronous active-low CLR - enables immediate reset independent of clock timing |
Pinout & Package
SN74HC273QDWRQ1 is housed in a 20-pin SOIC (DW) package, 7.5 mm × 12.8 mm footprint, 2.65 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CLR) | Asynchronous Clear Input | Active-low global reset for all eight flip-flops; overrides clock and data |
| 2–9 (1D–8D) | Data Inputs | Independent D inputs per flip-flop; sampled on CLK rising edge when CLR = high |
| 10 (GND) | Ground Reference | Power return path for logic and output stages; must be low-impedance |
| 11–18 (1Q–8Q) | True Outputs | Non-inverted registered outputs; each corresponds to its D input |
| 19 (VCC) | Supply Voltage | Positive supply rail; decoupling capacitor required near pin for noise immunity |
| 20 (CLK) | Clock Input | Positive-edge-triggered master clock; all flip-flops update simultaneously |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | AEC-Q100 Grade 1 qualified - validated for use in engine management, braking, and ADAS systems |
| Single-Rail Output Architecture | Eight true (non-inverted) Q outputs - eliminates need for external inverters in register file designs |
| Voltage-Level Flexibility | 2 V to 6 V operation - interoperable with legacy 5-V and modern 3.3-V microcontroller I/O |
| Low-Power CMOS Design | 160 µA max ICC - reduces thermal load and extends battery life in always-on vehicle modules |
| Robust Input Thresholds | VIL/VIL scaling with VCC - maintains noise margin across full supply range without external biasing |
Applications
| Engine Control Unit (ECU) Register File | ADAS Camera Interface Buffer |
|---|---|
Use Scenario: Storing sensor fusion results and actuator command states in real-time ECU execution cycles. IC Role / Device Role / Timing Role: Octal D-flip-flop acting as synchronous storage register synchronized to MCU clock domain. Use Value: Ensures deterministic timing alignment of control outputs with engine timing events via precise edge-triggered capture. | Use Scenario: Latching parallel pixel data streams from image sensors before serial conversion for SoC ingestion. IC Role / Device Role / Timing Role: Data buffer register capturing parallel LVDS or CMOS camera outputs on system clock edge. Use Value: Eliminates metastability risk during domain crossing between sensor and processor clocks using synchronous sampling. |
| Transmission Control Module (TCM) State Memory | Body Control Module (BCM) I/O Expansion |
Use Scenario: Holding gear selection status, solenoid enable flags, and fault latch bits across power cycles and wake events. IC Role / Device Role / Timing Role: Nonvolatile state register backed by external EEPROM; cleared only on hard reset or diagnostic command. Use Value: Provides glitch-free, race-free state retention during voltage transients common in 12-V automotive power rails. | Use Scenario: Expanding GPIO count for door lock actuators, mirror controls, and ambient lighting drivers in centralized BCM architecture. IC Role / Device Role / Timing Role: Parallel-to-parallel I/O expander interfacing with main MCU via dedicated control bus. Use Value: Reduces MCU pin count burden while maintaining deterministic update timing via synchronous write strobes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC574QDWRQ1 | Octal D-type latch with 3-state outputs; no internal clear; edge-triggered only on clock enable | Lacks asynchronous clear; requires external reset logic; suited for bus-hold applications | Select when bidirectional data bus isolation or output tri-state control is required |
| SN74AHC273QPWRQ1 | Same pinout and function but Advanced High-Speed CMOS; 3.5 ns tpd at 5 V; higher drive (±8 mA) | Higher speed and drive, but increased ICC (max 40 µA vs 160 µA); tighter layout constraints | Select when >40 MHz operation or stronger fanout is needed, accepting higher power and noise sensitivity |
Compared with SN74HC273QDWRQ1, SN74HC574QDWRQ1 trades asynchronous reset for 3-state flexibility, while SN74AHC273QPWRQ1 delivers faster timing and higher drive at the cost of greater static current and reduced noise margin - making SN74HC273QDWRQ1 optimal for cost-sensitive, thermally constrained automotive latching where deterministic reset and low ICC are critical.
Availability
SN74HC273QDWRQ1 is available at Aetrix Electronics and suitable for engine control units, ADAS camera interfaces, and transmission control modules requiring stable component supply across extended automotive temperature and lifecycle requirements.
Supply support for SN74HC273QDWRQ1 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
Texas Instruments is a U.S.-based semiconductor company specializing in analog, embedded processing, and automotive-grade logic solutions.
The SN74HC273-Q1 product line delivers AEC-Q100-qualified, high-reliability D-type flip-flops designed specifically for automotive subsystems requiring robust timing, latch stability, and extended temperature operation.
FAQ
What is the maximum clock frequency supported by SN74HC273QDWRQ1?
The SN74HC273QDWRQ1 supports a maximum clock frequency of 32 MHz at VCC = 6 V and 27 MHz at VCC = 4.5 V, as specified in the timing requirements table. These values assume proper signal integrity, load capacitance ≤50 pF, and adherence to setup/hold time constraints. The typical propagation delay of 13 ns at 5 V aligns with this performance envelope.
Does SN74HC273QDWRQ1 have built-in ESD protection?
Yes, SN74HC273QDWRQ1 incorporates standard CMOS input protection diodes rated for ±20 mA clamp current, meeting JEDEC JS-001 Class 2 (2 kV HBM) ESD robustness. This protection is integrated into the silicon die and does not require external components, supporting reliable handling and board-level operation in automotive assembly environments.
Can SN74HC273QDWRQ1 operate reliably at 3.3 V supply?
Yes, SN74HC273QDWRQ1 is fully specified down to 2 V and operates reliably at 3.3 V. At this voltage, it delivers 17 ns typical propagation delay, ±4 mA output drive, and maintains valid VIH/VIL thresholds (VIH = 2.31 V min, VIL = 1.09 V max), ensuring clean interfacing with 3.3-V microcontrollers and FPGAs without level translation.
Is SN74HC273QDWRQ1 pin-compatible with non-automotive variants like SN74HC273N?
No, SN74HC273QDWRQ1 uses a 20-pin SOIC (DW) package identical in pinout to SN74HC273N, but differs in qualification, marking, and test screening. While electrically and physically pin-compatible, SN74HC273QDWRQ1 undergoes AEC-Q100 stress testing and lot traceability required for automotive use - SN74HC273N lacks these qualifications and is not approved for safety-critical vehicle systems.
What is the thermal resistance (θJA) of the SN74HC273QDWRQ1 SOIC package?
The SN74HC273QDWRQ1 in the DW (SOIC-20) package has a junction-to-ambient thermal resistance (θJA) of 58°C/W, measured per JESD 51-7 on a standard 4-layer JEDEC test board. This value assumes 1 in² copper pad area per side and defines the worst-case temperature rise under continuous 160-µA ICC operation - actual thermal performance improves with PCB copper pour and airflow.
SN74HC273QDWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 60 MHz
- Max Propagation Delay @ V, Max CL:
- 27ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74HC273QDWRQ1 FAQ
1.How can I place an order for SN74HC273QDWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC273QDWRQ1 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 SN74HC273QDWRQ1 reliable?
The price and inventory of SN74HC273QDWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC273QDWRQ1 is usually 5 days.
3.What payment methods are accepted for SN74HC273QDWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC273QDWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC273QDWRQ1?
SN74HC273QDWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC273QDWRQ1 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 SN74HC273QDWRQ1?
For technical support, including SN74HC273QDWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC273QDWRQ1 requirements.
6.How does Aetrix verify that SN74HC273QDWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74HC273QDWRQ1 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 SN74HC273QDWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74HC273QDWRQ1?
All SN74HC273QDWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC273QDWRQ1, 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 SN74HC273QDWRQ1 part is unused and in its original packaging.
Return procedure for SN74HC273QDWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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