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Texas Instruments SN74LVC574ADWRE4
- Part No.:
- SN74LVC574ADWRE4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVC574ADWRE4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,135
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Product details
Overview
SN74LVC574ADWRE4 from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features 20-pin SOIC (DW) package, 7 ns max propagation delay at 3.3 V, 150 MHz max clock frequency, and supports mixed-mode 5-V input/3.3-V VCC interfacing in bus-hold and I/O port applications.
For engineers reviewing the SN74LVC574ADWRE4 datasheet, SN74LVC574ADWRE4 pinout, SN74LVC574ADWRE4 application, or SN74LVC574ADWRE4 equivalent, this device serves as a high-speed, low-voltage register for bidirectional data buffering, memory address latching, and industrial control bus isolation where Ioff partial-power-down protection and 5.5-V-tolerant inputs are required.
Technical Context
This device implements eight independent D-type flip-flops, each triggered on the positive edge of CLK. Outputs are controlled by a common active-low OE signal that places all Q outputs in high-impedance state without affecting internal latch operation. The architecture enables simultaneous data capture and output tri-state control for time-critical bus arbitration.
It incorporates Ioff circuitry to disable outputs during power-down, preventing current backflow when VCC = 0 V. Input tolerance up to 5.5 V allows direct interfacing with legacy 5-V logic while operating from 1.65–3.6 V supply, making it suitable for voltage translation in mixed-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across battery-powered, low-power embedded, and dual-rail industrial systems. |
| tpd (max) | 7 ns at 3.3 V - Supports 150 MHz clock rates for high-throughput data latching in real-time control loops. |
| Ioff | ±10 μA at 0 V - Ensures safe partial-power-down behavior in hot-swap and power-gated subsystems. |
| VI Max | 5.5 V - Allows direct connection to 5-V microcontrollers or sensors without level-shifting components. |
| Operating Temp | −40°C to 125°C - Qualified for under-hood automotive, motor drive, and industrial PLC environments. |
| IOL/IOH | ±24 mA at 3 V - Drives standard 50-pF loads and multiple CMOS inputs without external buffers. |
| Cpd (per FF) | 30 pF at 3.3 V - Predictable dynamic power consumption for thermal modeling in dense PCB layouts. |
Pinout & Package
SN74LVC574ADWRE4 uses a 20-pin SOIC (DW) package with 0.300-inch body width and standard JEDEC MS-013AC footprint. Pin 1 is located at top-left corner with polarity notch marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low global control for 3-state output drivers; does not affect internal flip-flop state retention. |
| 2–9 | D1–D8 (Data Inputs) | Asynchronous data inputs sampled on rising CLK edge; 5.5-V tolerant for mixed-voltage system integration. |
| 10 | GND | Ground reference for all logic and output stages; must be low-impedance for stable switching noise margin. |
| 11 | VCC | Primary power supply (1.65–3.6 V); decoupling capacitor required within 1 cm for EMI suppression. |
| 12–19 | Q1–Q8 (Outputs) | Edge-triggered registered outputs with 3-state capability; capable of driving 50-pF loads at 150 MHz. |
| 20 | CLK | Positive-edge clock input; requires monotonic transition with ≤6 ns/V slew rate for reliable setup/hold timing. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-voltage interface | 5.5-V-tolerant inputs enable direct connection to 5-V logic while operating from 1.65–3.6 V VCC. |
| Ioff protection | Prevents damaging current flow during partial power-down, supporting hot-plug and power sequencing in modular systems. |
| Low ground bounce | Typical VOLP < 0.8 V at 3.3 V ensures stable logic-low referencing during heavy capacitive load switching. |
| ESD robustness | 2000-V HBM, 200-V MM, and 1000-V CDM ratings reduce field failure risk in automated assembly and handling. |
| High-speed timing | 7 ns tpd and 2 ns tsu/th at 3.3 V support tight timing budgets in FPGA-to-ASIC bridging and real-time data acquisition. |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Expanding digital input/output capacity in programmable logic controllers using shared backplane buses. IC Role / Device Role / Timing Role: Acts as an octal latch buffer between microcontroller GPIO and isolated field I/O terminals, synchronizing asynchronous sensor signals to system clock domain. Use Value: Enables deterministic sampling of 8-bit status data with 7 ns propagation delay and Ioff-protected power sequencing during module hot-swap. | Use Scenario: Interfacing 5-V door lock actuators and window motor drivers to a 3.3-V body control MCU. IC Role / Device Role / Timing Role: Provides voltage translation and bidirectional bus isolation between MCU and legacy 5-V peripherals via 3-state outputs. Use Value: Eliminates need for discrete level shifters while maintaining −40°C to 125°C operation and 5.5-V input tolerance for robust vehicle subsystem communication. |
| Test Equipment Data Capture | Motor Drive Gate Driver Interface |
Use Scenario: Capturing parallel digital waveform data from ADCs or logic analyzers into FPGA-based acquisition buffers. IC Role / Device Role / Timing Role: Serves as a synchronous 8-bit data register synchronized to high-frequency sampling clocks, with OE-controlled bus release for multi-channel multiplexing. Use Value: Delivers 150 MHz maximum clock rate and 2 ns setup/hold timing to support sub-7 ns sampling intervals in benchtop instrumentation. | Use Scenario: Isolating gate driver control signals from MCU PWM outputs in three-phase inverter designs. IC Role / Device Role / Timing Role: Buffers and latches six independent PWM signals (D1–D6 → Q1–Q6), with OE enabling safe gate driver reset during fault conditions. Use Value: Provides 24 mA drive strength per output and Ioff protection to prevent shoot-through during DC link capacitor precharge or emergency shutdown sequences. |
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 |
|---|---|---|---|
| SN74LVC574APWR | TSSOP-20 package (4.4 mm × 6.5 mm), 83°C/W θJA, same electrical specs and pinout. | Better suited for space-constrained PCBs; requires tighter reflow profile due to smaller thermal mass. | Select when board area is limited and thermal management via copper pour is feasible. |
| SN74LVCH16374ADGGR | 16-bit version in 48-pin TSSOP; includes bus-hold circuitry and higher drive (±32 mA). | Designed for wider data buses; not pin-compatible and requires layout change. | Choose only when doubling channel count and enhanced noise immunity are required. |
Compared with SN74LVC574APWR, SN74LVC574ADWRE4 offers superior thermal dissipation (58°C/W vs. 83°C/W) in SOIC packaging, while SN74LVCH16374ADGGR provides double the register width and bus-hold functionality at the cost of non-interchangeable footprint and increased complexity.
Availability
SN74LVC574ADWRE4 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SN74LVC574ADWRE4 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 connectivity solutions with over 90 years of innovation in high-reliability IC design.
The SN74LVC574A product line delivers low-voltage, high-speed logic devices optimized for mixed-signal interfacing, bus buffering, and real-time data synchronization in industrial, automotive, and communications infrastructure.
FAQ
What is the maximum clock frequency supported by SN74LVC574ADWRE4?
The SN74LVC574ADWRE4 supports a maximum clock frequency of 150 MHz at 3.3 V VCC across the full −40°C to 125°C operating temperature range. At lower voltages such as 1.8 V, the maximum frequency reduces to 55 MHz. These values are guaranteed by TI's switching characteristics specifications and validated under recommended operating conditions with 50-pF load and proper signal integrity practices.
Does SN74LVC574ADWRE4 support partial power-down operation?
Yes, SN74LVC574ADWRE4 includes Ioff circuitry that disables outputs when VCC = 0 V, limiting current backflow to ±10 μA. This feature enables safe partial-power-down operation in modular systems where SN74LVC574ADWRE4 may remain connected to live buses while its supply rail is de-energized, complying with JESD78 latch-up and JEDEC 17 standards.
Can SN74LVC574ADWRE4 accept 5-V input signals while operating at 1.8 V VCC?
Yes, SN74LVC574ADWRE4 accepts input voltages up to 5.5 V regardless of VCC level, including at 1.8 V operation. This mixed-mode capability allows direct interfacing with 5-V microcontrollers or sensors without external level shifters, as confirmed by VI absolute maximum rating and functional operation tables in the SCAS301R datasheet.
What is the propagation delay (tpd) of SN74LVC574ADWRE4 at 2.5 V VCC?
At 2.5 V VCC, the SN74LVC574ADWRE4 exhibits a typical propagation delay of 4.9 ns and a maximum of 10.0 ns from CLK to Q, as specified in the switching characteristics table for −40°C to 85°C operation. This value assumes 30-pF load and 2.5 V ± 0.2 V supply, and is measured under standard test conditions defined in Figure 1 of the datasheet.
Is SN74LVC574ADWRE4 pin-compatible with other packages in the SN74LVC574A family?
Yes, SN74LVC574ADWRE4 shares identical pinout and function with all 20-pin variants of the SN74LVC574A family, including SN74LVC574APWR (TSSOP), SN74LVC574ADBR (SSOP), and SN74LVC574ADGVR (TVSOP). All variants use the same terminal assignment: pins 1–9 for OE/D1–D8, pin 10 for GND, pin 11 for VCC, pins 12–19 for Q1–Q8, and pin 20 for CLK.
SN74LVC574ADWRE4 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:
- Discontinued at Digi-Key
- 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:
- 6.8ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74LVC574ADWRE4 FAQ
1.How can I place an order for SN74LVC574ADWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC574ADWRE4 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 SN74LVC574ADWRE4 reliable?
The price and inventory of SN74LVC574ADWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC574ADWRE4 is usually 5 days.
3.What payment methods are accepted for SN74LVC574ADWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC574ADWRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC574ADWRE4?
SN74LVC574ADWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC574ADWRE4 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 SN74LVC574ADWRE4?
For technical support, including SN74LVC574ADWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC574ADWRE4 requirements.
6.How does Aetrix verify that SN74LVC574ADWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC574ADWRE4 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 SN74LVC574ADWRE4 meets industry standards.
7.What is the process for return or replacement of SN74LVC574ADWRE4?
All SN74LVC574ADWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC574ADWRE4, 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 SN74LVC574ADWRE4 part is unused and in its original packaging.
Return procedure for SN74LVC574ADWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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