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Texas Instruments SN74LVC574AQDWRQ1
- Part No.:
- SN74LVC574AQDWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVC574AQDWRQ1.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,615
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Product details
Overview
SN74LVC574AQDWRQ1 from Texas Instruments is an automotive-qualified octal edge-triggered D-type flip-flop with 3-state outputs, operating from 2 V to 3.6 V, featuring 7 ns max propagation delay at 3.3 V, 150 MHz max clock frequency, and Ioff support for partial-power-down mode - used in automotive I/O port buffering and bidirectional bus driving.
For engineers reviewing the SN74LVC574AQDWRQ1 datasheet, SN74LVC574AQDWRQ1 pinout, SN74LVC574AQDWRQ1 application, or SN74LVC574AQDWRQ1 equivalent, key selection factors include its AEC-Q100 qualification, mixed-voltage (5-V input tolerant / 3.3-V VCC) operation, 20-pin SOIC-DW package, and 3-state output drive capability for bus isolation.
Technical Context
This device implements eight independent D-type flip-flops, each triggered on the positive edge of CLK; OE controls all eight outputs simultaneously into high-impedance or active states without affecting internal latch operation. Its Ioff circuitry prevents backflow current during power-down, enabling safe hot-insertion in multi-rail systems.
Designed for 2.7–3.6 V VCC, it accepts inputs up to 5.5 V, allowing direct interfacing between 5-V legacy logic and 3.3-V domains. Output drive strength is ±24 mA at 3 V, with typical VOLP < 0.8 V and VOHV > 2 V at VCC = 3.3 V, ensuring signal integrity in noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 3.6 V - supports standard 3.3-V rail with margin for automotive voltage transients |
| Max Clock Frequency | 150 MHz - enables high-speed data latching in real-time control modules |
| tpd (max) | 7 ns at 3.3 V - ensures tight timing alignment in synchronous bus interfaces |
| Ioff Support | Yes - disables outputs during power-down to prevent damaging back-current in partial-power systems |
| Input Voltage Tolerance | Up to 5.5 V - allows direct connection to 5-V microcontrollers or sensors without level shifters |
| Output Drive | ±24 mA at 3 V - sufficient to drive 50-pF loads or multiple CMOS inputs on shared buses |
| Operating Temp | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood automotive use |
Pinout & Package
SN74LVC574AQDWRQ1 uses a 20-pin SOIC (DW) package, 7.5 mm × 12.8 mm body size, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low global control for all eight outputs; sets Q pins to high-Z when high |
| 2–9 | 1D–8D | Data inputs latched on CLK↑; accept 0–5.5 V regardless of VCC |
| 10 | GND | Ground reference for logic and power return path |
| 11 | VCC | Primary supply (2–3.6 V); powers internal logic and output drivers |
| 12–19 | 1Q–8Q | 3-state buffered outputs; drive high/low or float based on OE and CLK timing |
| 20 | CLK | Positive-edge-triggered clock input; synchronizes all eight D-to-Q transfers |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Rated for automotive Grade 1 (–40°C to +125°C), supporting engine control, ADAS, and body electronics |
| Mixed-Mode Signal Operation | 5-V-tolerant inputs enable seamless integration in hybrid 3.3-V/5-V systems without external translators |
| Low Ground Bounce | Typical VOLP < 0.8 V at 3.3 V ensures stable logic low levels during heavy capacitive switching |
| High-Impedance Isolation | Outputs fully disconnect from bus lines when OE is asserted, eliminating loading and contention |
| Partial-Power-Down Safe | Ioff limits reverse current flow when VCC = 0, protecting powered subsystems during fault or sleep modes |
Applications
| Engine Control Unit (ECU) I/O Expansion | Automotive Infotainment Bus Interface |
|---|---|
Use Scenario: Expanding GPIO count on a 3.3-V MCU to manage solenoid drivers, sensor readbacks, and diagnostic LEDs in an ECU. IC Role / Device Role / Timing Role: Octal D-flip-flop acting as synchronized output register; CLK aligned to MCU peripheral clock, OE controlled by firmware for safe bus release. Use Value: Enables deterministic, glitch-free output updates across eight channels while isolating MCU pins from inductive load transients. | Use Scenario: Interfacing a 5-V display controller to a 3.3-V application processor via a shared parallel data bus in head-unit design. IC Role / Device Role / Timing Role: Level-translating latch buffer; accepts 5-V data/control signals, latches on rising CLK, and drives 3.3-V bus with 3-state control for bidirectional arbitration. Use Value: Eliminates discrete level shifters and reduces BOM count while maintaining timing compliance at 150 MHz bus rates. |
| ADAS Camera Module Sync Logic | Body Control Module (BCM) Status Register |
Use Scenario: Capturing and holding parallel pixel data from a high-speed image sensor before serialization in a surround-view camera system. IC Role / Device Role / Timing Role: Edge-triggered data capture register; CLK sourced from sensor pixel clock, OE used to freeze frame data during processing. Use Value: Provides sub-ns setup/hold margins (tsu/th = 2 ns) and low propagation skew across all eight bits for accurate frame boundary alignment. | Use Scenario: Consolidating door lock, window position, and lighting status signals from multiple LIN nodes into a centralized BCM register bank. IC Role / Device Role / Timing Role: Synchronized input latch for polling-based status aggregation; CLK driven by BCM timer interrupt, OE tied high for continuous read access. Use Value: Reduces MCU polling overhead and eliminates metastability risk via synchronous sampling of asynchronous mechanical switch inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC574APWRQ1 | TSSOP-20 (PW) package; 83°C/W θJA vs. 58°C/W for DW; identical electrical specs | Better suited for space-constrained PCB layouts where SOIC footprint is prohibitive | Select when board area is critical and thermal budget allows higher junction rise |
| SN74LVCH16374AQRGYRQ1 | 16-bit version, dual-rail I/O (1.65–3.6 V), different pinout, higher drive (±32 mA) | Targets wider data buses and more complex voltage-domain bridging in gateway modules | Choose only when 16-bit width and dual-supply flexibility outweigh added complexity and cost |
Compared with SN74LVC574AQDWRQ1, the PW-package alternative offers smaller footprint but reduced thermal performance, while the 16-bit LVCH variant expands functionality at the cost of pin compatibility and design reuse - making SN74LVC574AQDWRQ1 optimal for cost-sensitive, thermally stable 8-bit automotive I/O expansion.
Availability
SN74LVC574AQDWRQ1 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera synchronization, and infotainment bus interfacing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC574AQDWRQ1 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 global semiconductor leader specializing in analog, embedded processing, and automotive ICs, with over 90 years of innovation in high-reliability electronics.
The SN74LVC574A-Q1 belongs to TI's automotive logic portfolio, designed specifically for robust, AEC-Q100-compliant data latching and bus interface functions in harsh-temperature vehicle subsystems.
FAQ
What is the maximum clock frequency supported by SN74LVC574AQDWRQ1?
The SN74LVC574AQDWRQ1 supports a maximum clock frequency of 150 MHz at VCC = 3.3 V, as specified in the switching characteristics table. This rating holds across the full operating temperature range (–40°C to +125°C) and enables reliable high-speed data capture in automotive timing-critical applications such as sensor interfacing and bus arbitration.
Does SN74LVC574AQDWRQ1 support 5-V input signals while operating at 3.3-V VCC?
Yes, SN74LVC574AQDWRQ1 accepts input voltages up to 5.5 V regardless of VCC level (2–3.6 V), enabling direct connection to 5-V logic sources without external level shifters. This mixed-mode operation is explicitly documented in the datasheet and verified across temperature and voltage corners for automotive-grade reliability.
What is the purpose of the Ioff feature in SN74LVC574AQDWRQ1?
The Ioff feature in SN74LVC574AQDWRQ1 disables output buffers when VCC = 0 V, preventing damaging current backflow from live bus lines into the unpowered device. This supports safe partial-power-down operation in modular automotive ECUs where subsystems may be independently cycled, and is validated per AEC-Q100 stress testing protocols.
Can SN74LVC574AQDWRQ1 be used in place of SN74LVC574APWRQ1?
SN74LVC574AQDWRQ1 and SN74LVC574APWRQ1 share identical electrical specifications and logic behavior but differ in package: DW (SOIC-20) vs. PW (TSSOP-20). They are not pin-compatible due to different pinouts and land patterns; PCB redesign is required for substitution. Thermal and mechanical integration must also be re-evaluated.
What does the "Q1" suffix indicate in SN74LVC574AQDWRQ1?
The "Q1" suffix in SN74LVC574AQDWRQ1 denotes AEC-Q100 qualification for automotive applications, including enhanced reliability testing, extended temperature range (–40°C to +125°C), and production traceability per automotive quality standards. It is not a generic industrial variant - this part is certified for use in safety-critical vehicle subsystems.
SN74LVC574AQDWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- 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:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 7ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74LVC574AQDWRQ1 FAQ
1.How can I place an order for SN74LVC574AQDWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC574AQDWRQ1 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 SN74LVC574AQDWRQ1 reliable?
The price and inventory of SN74LVC574AQDWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC574AQDWRQ1 is usually 5 days.
3.What payment methods are accepted for SN74LVC574AQDWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC574AQDWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC574AQDWRQ1?
SN74LVC574AQDWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC574AQDWRQ1 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 SN74LVC574AQDWRQ1?
For technical support, including SN74LVC574AQDWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC574AQDWRQ1 requirements.
6.How does Aetrix verify that SN74LVC574AQDWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LVC574AQDWRQ1 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 SN74LVC574AQDWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74LVC574AQDWRQ1?
All SN74LVC574AQDWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC574AQDWRQ1, 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 SN74LVC574AQDWRQ1 part is unused and in its original packaging.
Return procedure for SN74LVC574AQDWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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