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NXP Semiconductors 74LVT574BQ,115
- Part No.:
- 74LVT574BQ,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74LVT574BQ,115.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,628
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Product details
Overview
74LVT574BQ,115 from NXP Semiconductors is a 3.3 V octal D-type flip-flop with 3-state outputs, designed for bus interfacing in high-speed digital systems. It features edge-triggered latching (rising clock), independent output enable control (active LOW), and operates across −40 °C to +85 °C. Its DHVQFN20 package enables compact PCB layout in memory address/data buffering applications.
For engineers reviewing the 74LVT574BQ,115 datasheet, 74LVT574BQ,115 pinout, 74LVT574BQ,115 application, or 74LVT574BQ,115 equivalent, key selection criteria include propagation delay (≤5.9 ns at 2.7 V), 3-state output drive capability (±32 mA), bus hold inputs eliminating external pull-ups, and compatibility with 5 V-tolerant I/O in mixed-supply systems.
Technical Context
This device implements eight independent D-type flip-flops synchronized to a common rising-edge clock (CP), each feeding a dedicated 3-state output buffer. The output enable (OE) signal operates asynchronously and independently of CP, allowing immediate high-impedance control of all eight outputs.
It supports TTL-level input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) and delivers rail-to-rail output swing under load, with bus hold circuitry on all data inputs (D0–D7) to maintain logic state when un-driven. Input and output voltage tolerance extends to 5.5 V, enabling safe interfacing with legacy 5 V logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2.7 V to 3.6 V - Ensures stable operation in modern 3.3 V systems with ±0.3 V margin. |
| Propagation delay (tPLH/tPHL) | ≤5.4 ns at 3.0–3.6 V - Enables reliable timing in 150 MHz clock domains with setup/hold margins. |
| Output drive (IOL/IOH) | ±32 mA - Sufficient to drive heavily loaded 3-state buses, MOS memories, and microprocessor data lines. |
| Bus hold current | ±75 µA to ±150 µA - Maintains valid logic levels on unused D inputs without external pull-up/down resistors. |
| Operating temperature | −40 °C to +85 °C - Qualified for industrial-grade embedded and computing applications. |
| Input voltage tolerance | 0 V to 5.5 V - Allows direct connection to 5 V logic without level-shifting circuitry. |
| Power-up 3-state | Guaranteed high-impedance output at power-on - Prevents bus contention during system initialization. |
Pinout & Package
DHVQFN20 package: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 20 terminals; body 2.5 × 4.5 × 0.85 mm (SOT764-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active LOW output enable | Asynchronous control: drives Q0–Q7 into high-Z when HIGH; no clock dependency. |
| 2–9 (D0–D7) | Data inputs | Feature integrated bus hold; retain last valid logic state when floating - eliminates external biasing. |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and output drivers; must be low-inductance connection. |
| 11 (CP) | Rising-edge clock input | Samples Dn inputs one setup time before LOW-to-HIGH transition; defines register update timing. |
| 12–19 (Q0–Q7) | 3-state data outputs | Reflect stored Dn values when OE = LOW; enter high-Z (neither drive nor load) when OE = HIGH. |
| 20 (VCC) | Positive supply | 3.3 V nominal supply; supports 2.7–3.6 V range; decoupling capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| 3-state bus interface | Enables shared data/address bus operation with multiple devices; OE allows dynamic bus arbitration. |
| 5 V-tolerant I/O | Inputs and outputs withstand up to 5.5 V - simplifies integration with legacy 5 V peripherals and controllers. |
| Bus hold on data inputs | Eliminates need for 10 kΩ external pull-up/down resistors on D0–D7 - reduces BOM count and board space. |
| Live insertion/extraction support | Output drivers remain in high-Z during hot-plug events - prevents bus glitches and backdrive damage. |
| Power-up 3-state | Outputs default to high-impedance at power-on - avoids undefined bus states during power sequencing. |
Applications
| Memory Address Latching | Microprocessor Data Bus Buffering |
|---|---|
Use Scenario: Latching address bits between CPU and SRAM/ROM during multiplexed bus cycles. IC Role / Device Role / Timing Role: Edge-triggered register capturing address on rising CP edge; OE controls bus release timing. Use Value: Eliminates address skew and ensures stable memory access windows; 5.4 ns tPLH supports >150 MHz operation. |
Use Scenario: Isolating and driving bidirectional data lines between microprocessor and peripheral ICs. IC Role / Device Role / Timing Role: 3-state output buffer controlled by OE; synchronized to CPU write strobe or RD/WR signals. Use Value: ±32 mA drive strength handles capacitive loads up to 50 pF; bus hold prevents floating inputs during idle cycles. |
| FPGA I/O Expansion | Industrial Control Backplane Interface |
Use Scenario: Extending FPGA GPIO count for driving LEDs, relays, or sensors via parallel interface. IC Role / Device Role / Timing Role: Parallel output latch; CP driven by FPGA clock, OE managed by FPGA control logic. Use Value: Compact DHVQFN20 footprint saves space; 0.85 mm height suits slim enclosures; −40 °C to +85 °C rating ensures field reliability. |
Use Scenario: Interfacing PLC modules to shared backplane data bus with multiple slot masters. IC Role / Device Role / Timing Role: Bus transceiver element; OE coordinated with slot arbitration logic to prevent contention. Use Value: Live insertion support allows hot-swap module replacement; 5 V I/O tolerance accommodates mixed-voltage backplane designs. |
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 |
|---|---|---|---|
| 74LVTH574BQ,115 | Higher drive strength (±64 mA vs. ±32 mA); identical pinout and logic function. | Better suited for heavier capacitive loads (>50 pF) or longer trace lengths requiring stronger edge rates. | Select when higher output current is required; verify VCC derating (4.5 mW/K above 60 °C) remains within thermal budget. |
| SN74LVC574APWR | 3.3 V only (no 5 V I/O tolerance); same 20-pin TSSOP package; slightly slower tPLH (6.7 ns max). | Limited to pure 3.3 V systems; lacks bus hold - requires external termination on unused inputs. | Choose for cost-sensitive, single-supply designs where 5 V interoperability and bus hold are not needed. |
Compared with 74LVT574BQ,115, the 74LVTH574BQ,115 offers double the output drive for demanding bus loads, while the SN74LVC574APWR trades I/O flexibility and bus hold for lower cost and simpler supply design - both require validation of thermal performance and signal integrity in target layouts.
Availability
74LVT574BQ,115 is available at Aetrix Electronics and suitable for memory subsystems, microprocessor bus interfaces, FPGA I/O expansion, and industrial backplane designs requiring stable component supply and guaranteed long-term sourcing.
Supply support for 74LVT574BQ,115 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The 74LVT574BQ,115 belongs to NXP's high-speed LVT logic family, engineered for robust 3.3 V bus interfacing with 5 V tolerance and industrial temperature resilience.
FAQ
What is the maximum clock frequency supported by the 74LVT574BQ,115?
The 74LVT574BQ,115 supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 3.0 V to 3.6 V). This is validated by its propagation delay (tPLH/tPHL ≤ 5.4 ns) and pulse width requirement (tW ≥ 3.3 ns), ensuring reliable setup and hold timing margins in high-speed synchronous systems using the 74LVT574BQ,115.
Does the 74LVT574BQ,115 require external pull-up resistors on its data inputs?
No, the 74LVT574BQ,115 integrates bus hold circuitry on all D0–D7 inputs, providing ±75 µA to ±150 µA holding current to maintain valid logic states when inputs are un-driven. This eliminates the need for external pull-up or pull-down resistors, reducing BOM cost and PCB area - a confirmed feature of the 74LVT574BQ,115 per its NXP datasheet Rev. 7.
Can the 74LVT574BQ,115 safely interface with 5 V logic devices?
Yes, the 74LVT574BQ,115 supports 5 V-tolerant inputs and outputs: VI and VO ratings extend to 5.5 V, and it operates with TTL-compatible thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V). This allows direct connection to 5 V microcontrollers or peripherals without level shifters - a documented capability of the 74LVT574BQ,115 in mixed-voltage system designs.
What is the thermal performance of the 74LVT574BQ,115 in its DHVQFN20 package?
The 74LVT574BQ,115 in DHVQFN20 (SOT764-1) has a thermal derating of 4.5 mW/K above 60 °C ambient. Its maximum junction temperature is 150 °C, and total power dissipation is rated at 500 mW. These thermal characteristics are specified in the NXP datasheet and directly apply to the 74LVT574BQ,115, enabling accurate thermal design for industrial environments.
How does the output enable (OE) function interact with the clock (CP) in the 74LVT574BQ,115?
In the 74LVT574BQ,115, OE operates asynchronously and independently of CP: when OE is HIGH, all Q0–Q7 outputs immediately enter high-impedance regardless of CP state or timing; when OE is LOW, outputs reflect the latched Dn values on the next rising CP edge. This separation enables precise bus control without clock synchronization - a core functional behavior of the 74LVT574BQ,115.
74LVT574BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVT
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-DHVQFN (4.5x2.5)
74LVT574BQ,115 FAQ
1.How can I place an order for 74LVT574BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT574BQ,115 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 74LVT574BQ,115 reliable?
The price and inventory of 74LVT574BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT574BQ,115 is usually 5 days.
3.What payment methods are accepted for 74LVT574BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT574BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT574BQ,115?
74LVT574BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT574BQ,115 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 74LVT574BQ,115?
For technical support, including 74LVT574BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT574BQ,115 requirements.
6.How does Aetrix verify that 74LVT574BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74LVT574BQ,115 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 74LVT574BQ,115 meets industry standards.
7.What is the process for return or replacement of 74LVT574BQ,115?
All 74LVT574BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT574BQ,115, 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 74LVT574BQ,115 part is unused and in its original packaging.
Return procedure for 74LVT574BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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