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Texas Instruments SN74LVT574DW
- Part No.:
- SN74LVT574DW
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVT574DW.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,776
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Product details
Overview
SN74LVT574DW from Texas Instruments is a 3.3-V ABT octal edge-triggered D-type flip-flop with 3-state outputs in a 20-pin SOIC (DW) package. It features bus-hold inputs, mixed-mode 5-V/3.3-V I/O compatibility, 150-MHz maximum clock frequency, and ±64-mA output drive at VCC = 3.3 V. It serves as a data latch and bus interface in high-speed digital systems such as memory address/data buffers and FPGA I/O expansion.
For engineers reviewing the SN74LVT574DW datasheet, SN74LVT574DW pinout, SN74LVT574DW application, or SN74LVT574DW equivalent, key selection criteria include its 3-state output control timing (tPZL/tPHZ ≤ 6.2 ns), bus-hold input retention, 2.7–3.6-V supply range, and compatibility with TTL-level 5-V inputs while operating at 3.3-V VCC.
Technical Context
This device implements eight independent positive-edge-triggered D flip-flops with asynchronous 3-state output enable (OE). Each flip-flop captures D-input logic on the rising CLK edge and holds state until the next clock transition. OE operates independently of clocking - enabling high-impedance output states without affecting internal register operation or data retention.
The ABT (Advanced BiCMOS Technology) process delivers low static power (ICC ≤ 12 mA at VCC = 3.6 V, outputs enabled) and robust noise immunity: VOLP < 0.8 V, ESD > 2000 V (MIL-STD-883C), and latch-up immunity > 500 mA (JESD-17). Bus-hold circuitry maintains valid logic levels on unused D inputs without external pullups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - supports unregulated battery operation down to 2.7 V with full functionality. |
| Max Clock Frequency | 150 MHz - enables high-speed data latching in memory interfaces and synchronous bus systems. |
| Output Drive | ±64 mA (IOL/IOH) at VCC = 3.3 V - drives heavy capacitive loads and multiple TTL inputs without buffers. |
| Propagation Delay | tPLH/tPHL ≤ 6.6 ns (VCC = 3.3 V) - ensures tight timing margins in 100+ MHz digital designs. |
| Input Compatibility | 5-V tolerant inputs (VI up to 5.5 V) - allows direct connection to legacy 5-V logic without level shifters. |
| Bus-Hold Current | ±75 μA at VI = 0.8 V / 2.0 V - actively retains logic state on floating data inputs, eliminating external pullup resistors. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded and communications equipment. |
Pinout & Package
SN74LVT574DW uses a 20-pin plastic small-outline integrated circuit (SOIC) package (DW), 7.5 mm × 12.8 mm footprint, 2.65 mm max height, JEDEC MS-013 compliant. Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low control: drives all eight Q outputs to high-impedance when high; no effect on internal flip-flop operation. |
| 2–9 | D1–D8 (Data Inputs) | Asynchronous data inputs with integrated bus-hold - retain last valid logic level if left floating. |
| 10 | GND | Ground reference for all internal circuitry and I/O. |
| 11 | VCC | 3.3-V supply input (2.7–3.6 V range); decoupling capacitor required near pin. |
| 12–19 | Q1–Q8 (Outputs) | 3-state buffered outputs; each sinks up to 64 mA or sources up to 32 mA at VCC = 3.3 V. |
| 20 | CLK | Positive-edge-triggered clock input - samples D inputs only on rising edge; no internal synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-voltage I/O | 5-V-tolerant inputs and 3.3-V outputs enable seamless interfacing between legacy 5-V and modern low-voltage logic domains. |
| Bus-hold inputs | Eliminates need for external pullup/pulldown resistors on D lines, reducing BOM count and PCB area in bus applications. |
| Live insertion support | Robust ESD (≥2000 V HBM) and latch-up immunity (>500 mA) allow safe hot-plug operation in backplane and modular systems. |
| Low ground bounce | VOLP < 0.8 V at VCC = 3.3 V ensures signal integrity during simultaneous output switching in dense bus environments. |
| Power-down high-Z control | OE tied to VCC via pullup resistor guarantees outputs remain high-impedance during power-up/power-down sequences. |
Applications
| Memory Address Latching | FPGA I/O Expansion |
|---|---|
Use Scenario: Latching address bits from a microcontroller to drive SRAM or Flash memory address bus. IC Role / Device Role / Timing Role: Edge-triggered D flip-flop capturing stable address values on CLK rise; 3-state outputs isolate bus during read/write cycles. Use Value: Enables clean address hold with 6.6-ns propagation delay and eliminates contention on shared address lines using OE-controlled high-Z. | Use Scenario: Extending FPGA GPIO count to drive parallel LCD segments or LED arrays requiring higher current than FPGA pins provide. IC Role / Device Role / Timing Role: Output buffer/latch translating FPGA logic levels to 3.3-V CMOS-compatible signals with ±64-mA drive capability. Use Value: Delivers 64-mA sink per output - sufficient to directly drive common-anode LCD segments without external transistors. |
| Industrial Bus Interface | Test Equipment Data Capture |
Use Scenario: Isolating and latching sensor data across an isolated RS-485 or CAN bus interface before processing by a host MCU. IC Role / Device Role / Timing Role: Synchronizing asynchronous serial data into a deterministic parallel word using CLK aligned to system timing domain. Use Value: Bus-hold inputs prevent metastability on unterminated data lines; 150-MHz clock rating supports oversampling capture at high baud rates. | Use Scenario: Capturing parallel test vectors from ATE (automated test equipment) into a diagnostic controller for real-time analysis. IC Role / Device Role / Timing Role: High-speed data acquisition latch sampling wide parallel buses at precise clock edges with minimal skew. Use Value: 2.4-ns setup time and 0.3-ns hold time (VCC = 2.7 V) ensure reliable capture of fast test patterns with marginal timing margins. |
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 |
|---|---|---|---|
| SN74LVTH162374DGGR | 16-bit, dual-rail 3.3-V LVTH family; higher drive (±24 mA per bit), no bus-hold; TSSOP-48 package. | Designed for wider data buses; lacks bus-hold, requiring external termination; not pin-compatible. | Select when 16-bit width and lower power (ICC < 4 mA) outweigh need for bus-hold and SOIC packaging. |
| 74ALVC574PW | 8-bit ALVC family; 1.65–3.6-V supply; 24-mA drive; no bus-hold; TSSOP-20 package. | Lower drive strength and no bus-hold; optimized for ultra-low power, not high-noise industrial environments. | Choose for cost-sensitive, low-power consumer applications where 5-V input tolerance and bus-hold are unnecessary. |
Compared with SN74LVT574DW, SN74LVTH162374DGGR offers double the bit width but requires redesign for 48-pin layout and external biasing, while 74ALVC574PW reduces supply range flexibility and removes critical bus-hold protection - making SN74LVT574DW uniquely suited for robust 5-V/3.3-V mixed-signal industrial bus interfacing.
Availability
SN74LVT574DW is available at Aetrix Electronics and suitable for memory address latching, FPGA I/O expansion, industrial bus interface, and test equipment data capture requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVT574DW 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74LVT574DW belongs to TI's ABT (Advanced BiCMOS Technology) logic family, engineered for high-speed, low-noise 3.3-V operation with mixed-voltage interoperability and robust bus interface capabilities.
FAQ
What is the recommended power supply decoupling for SN74LVT574DW?
Place a 0.1-μF ceramic capacitor between VCC (pin 11) and GND (pin 10) as close as possible to the SN74LVT574DW package. For systems with high-frequency switching, add a 4.7-μF bulk capacitor nearby. This minimizes supply noise and suppresses ground bounce (VOLP < 0.8 V), ensuring reliable 150-MHz operation of the SN74LVT574DW under dynamic load conditions.
Can SN74LVT574DW interface directly with 5-V microcontrollers?
Yes - the SN74LVT574DW accepts 5-V logic inputs (VI up to 5.5 V) while operating from a 3.3-V supply, enabling direct connection to 5-V microcontrollers without level shifters. Its outputs swing rail-to-rail (0 V to 3.3 V), so receiving devices must be 3.3-V tolerant. This mixed-mode capability is intrinsic to the SN74LVT574DW's ABT process design and verified across −40°C to +85°C.
Does SN74LVT574DW require external pullup resistors on its D inputs?
No - the SN74LVT574DW integrates active bus-hold circuitry on all eight D inputs, maintaining valid logic levels (±75 μA hold current) on floating or unterminated lines. This eliminates external pullup resistors, reducing component count and board space. Bus-hold is always active and does not depend on OE or CLK state - a key reliability feature of the SN74LVT574DW in noisy industrial environments.
What is the minimum recommended pullup resistor value for OE on SN74LVT574DW?
Tie OE (pin 1) to VCC through a pullup resistor with minimum value determined by the driver's current-sinking capability. For standard logic drivers, 4.7 kΩ is typical. This ensures the SN74LVT574DW outputs enter high-impedance during power-up/power-down, preventing bus contention. The SN74LVT574DW's internal OE buffer draws <1 μA, so even high-value resistors (≤100 kΩ) maintain reliable logic-high assertion.
Is SN74LVT574DW suitable for live-insertion applications?
Yes - the SN74LVT574DW is explicitly designed for live insertion, with ESD protection exceeding 2000 V (HBM, MIL-STD-883C) and latch-up performance >500 mA (JESD-17). Its ABT process and robust I/O structure allow safe hot-plug operation in modular backplanes and field-replaceable units. These characteristics are validated and documented in the official SN74LVT574DW datasheet from Texas Instruments.
SN74LVT574DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 5.9ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Current - Quiescent (Iq):
- 190 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74LVT574DW FAQ
1.How can I place an order for SN74LVT574DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVT574DW 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 SN74LVT574DW reliable?
The price and inventory of SN74LVT574DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT574DW is usually 5 days.
3.What payment methods are accepted for SN74LVT574DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT574DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVT574DW?
SN74LVT574DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVT574DW 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 SN74LVT574DW?
For technical support, including SN74LVT574DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT574DW requirements.
6.How does Aetrix verify that SN74LVT574DW is sourced from the original manufacturer or authorized distributors?
All SN74LVT574DW 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 SN74LVT574DW meets industry standards.
7.What is the process for return or replacement of SN74LVT574DW?
All SN74LVT574DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT574DW, 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 SN74LVT574DW part is unused and in its original packaging.
Return procedure for SN74LVT574DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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