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NXP Semiconductors 74LVTH574DB,118
- Part No.:
- 74LVTH574DB,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
74LVTH574DB,118.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SSOP
- Quantity:
- Payment:
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Inventory:6,000
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Product details
Overview
74LVTH574DB,118 from NXP Semiconductors is a 3.3 V octal D-type flip-flop with 3-state outputs, edge-triggered by a rising clock (CP), and independently controlled output enable (OE). It provides 8-bit registered data latching and bus-isolated output driving for high-density digital systems. Key confirmed parameters: tPLH ≤ 5.4 ns (VCC = 3.6 V), IOL = 32 mA, VIH = 2.0 V, VIL = 0.8 V, and operating range −40 °C to +85 °C.
For engineers reviewing the 74LVTH574DB,118 datasheet, 74LVTH574DB,118 pinout, 74LVTH574DB,118 application, or 74LVTH574DB,118 equivalent, this page delivers verified functional identity, SSOP20 package mapping, timing-critical propagation delays, bus-hold input capability, and direct alternatives for 3.3 V logic interfacing in memory and microprocessor bus architectures.
Technical Context
The 74LVTH574DB,118 implements eight independent D-type flip-flops synchronized to the rising edge of CP, with each Qn output retaining its state until the next active clock transition. Its 3-state output buffers are fully decoupled from clock operation and respond solely to OE (active LOW), enabling true bus contention avoidance during data transfer cycles.
It features integrated bus-hold circuitry on all Dn inputs (IBHH = −75 µA at VI = 2.0 V, VCC = 3.0 V), eliminating external pull-up resistors for unused inputs. The device supports mixed-voltage interfacing: TTL-compatible input thresholds and 5 V-tolerant I/O allow seamless integration with legacy 5 V systems while operating at 3.3 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - ensures stable operation across industrial 3.3 V rail tolerances without undervoltage lockout or overvoltage stress. |
| Propagation Delay (tPLH/tPHL) | ≤ 5.4 ns / ≤ 5.9 ns at VCC = 3.6 V - enables reliable 150 MHz clock operation in high-speed address/data latching paths. |
| Output Drive (IOL/IOH) | 32 mA / −32 mA - sufficient to drive heavily loaded 3-state buses, MOS memories, and microprocessor data lines directly. |
| Input Thresholds (VIH/VIL) | ≥ 2.0 V / ≤ 0.8 V - guarantees TTL-level compatibility and noise margin against 3.3 V logic families. |
| Bus-Hold Current | IBHH = −75 to −150 µA, IBHL = 75 to 150 µA - actively maintains valid logic states on floating Dn inputs without external components. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade embedded control, communications, and computing environments. |
Pinout & Package
74LVTH574DB,118 is housed in a plastic shrink small outline package (SSOP20) per SOT339-1: 20-pin, 5.3 mm body width, 0.65 mm pitch, gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-LOW output enable | Asserting LOW enables all eight Qn outputs; HIGH places them in high-impedance OFF-state, independent of CP. |
| 2–9 (D0–D7) | Data inputs | Asynchronous inputs sampled on rising CP edge; feature bus-hold circuitry to retain last valid state when un-driven. |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and output drivers; must be low-impedance for signal integrity. |
| 11 (CP) | Clock pulse input | Rising-edge sensitive; requires minimum pulse width of 3.3 ns (VCC ≥ 3.0 V) for reliable register capture. |
| 12–19 (Q0–Q7) | Registered 3-state outputs | Reflect Dn values captured at previous CP edge when OE = LOW; tri-stated when OE = HIGH. |
| 20 (VCC) | Positive supply | 3.3 V nominal supply; must be decoupled locally to suppress switching noise affecting timing margins. |
Key Features
| Feature | Design Value |
|---|---|
| Bus-hold inputs | Eliminates need for external pull-up/pull-down resistors on Dn pins, reducing BOM count and board space in sparse-bus configurations. |
| TTL-compatible I/O | Accepts standard TTL voltage levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V) while operating at 3.3 V, enabling drop-in replacement in legacy 5 V system upgrades. |
| 5 V-tolerant outputs | Outputs safely interface with 5 V buses without level shifters, supporting mixed-voltage backplane and peripheral interconnects. |
| Power-up 3-state | Ensures outputs remain in high-impedance state during power ramp-up, preventing bus contention before system initialization completes. |
| Latch-up protection | JESD78 Class II (>500 mA) immunity prevents destructive latch-up under transient overvoltage or ESD events in real-world PCB environments. |
Applications
| Memory Interface Buffering | Microprocessor Data Bus Latching |
|---|---|
Use Scenario: Isolating and registering data between a 32-bit microprocessor and asynchronous SRAM or Flash memory with shared address/data bus. IC Role / Device Role / Timing Role: Acts as an octal transparent latch and 3-state driver, capturing processor write data on CP rise and presenting it to memory during OE-enabled cycles. Use Value: Enables clean separation of processor and memory timing domains; bus-hold prevents floating data lines during memory access arbitration. | Use Scenario: Holding status or configuration data from a microcontroller GPIO port for display drivers or sensor interfaces requiring static parallel input. IC Role / Device Role / Timing Role: Functions as a synchronous 8-bit register, storing volatile control bits on each CP edge and holding them stable until next update. Use Value: Provides deterministic setup/hold timing (tsu = 2.0 ns, th = 0.3 ns at VCC = 3.3 V) for glitch-free control signal generation in real-time systems. |
| Industrial PLC I/O Expansion | Test Equipment Digital Pattern Generation |
Use Scenario: Expanding digital input/output capacity in programmable logic controllers where field I/O modules require isolated, noise-immune data staging. IC Role / Device Role / Timing Role: Serves as a buffered, registered interface between FPGA-based controller logic and opto-isolated I/O banks. Use Value: 3-state outputs prevent back-driving during hot-swap or module reconfiguration; −40 °C to +85 °C rating ensures reliability in harsh cabinet environments. | Use Scenario: Generating precise, synchronized digital stimulus patterns for IC functional testing, where multiple 74LVTH574DB,118 devices feed parallel test vectors into DUTs. IC Role / Device Role / Timing Role: Operates as a high-speed pattern register, latching test data from pattern memory on each CP edge and driving it onto test bus lines. Use Value: Sub-6 ns propagation delay and 150 MHz max frequency support tight timing windows required for high-speed digital validation. |
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 | Lower drive (24 mA), no bus-hold, 1.65–3.6 V supply range | Requires external pull-ups on unused inputs; less robust in noisy industrial environments | Preferred for cost-sensitive, low-power portable designs where bus-hold is unnecessary. |
| 74ALVCH162374T | 16-bit, dual-rail (1.65–3.6 V), higher pin count (48-pin TSSOP), no bus-hold | Targets wider data buses; lacks input retention, increasing layout complexity for sparse I/O | Chosen when doubling channel density is critical and board space permits larger package. |
Compared with SN74LVC574APWR and 74ALVCH162374T, the 74LVTH574DB,118 uniquely combines 32 mA drive strength, integrated bus-hold, and proven 3.3 V industrial reliability-making it optimal for legacy bus upgrades and noise-prone embedded control where input stability and output drive are non-negotiable.
Availability
74LVTH574DB,118 is available at Aetrix Electronics and suitable for memory interface buffering, microprocessor data bus latching, and industrial PLC I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVTH574DB,118 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with core expertise in high-performance logic and interface ICs.
The 74LVTH574DB,118 belongs to NXP's 3.3 V LVT/LVTH logic family, engineered specifically for high-speed, low-noise 3-state bus interfacing in industrial computing and memory subsystems where signal integrity and mixed-voltage compatibility are critical.
FAQ
What is the maximum clock frequency supported by the 74LVTH574DB,118?
The 74LVTH574DB,118 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 guaranteed tW (clock pulse width) of 3.3 ns and propagation delays (tPLH/tPHL) ≤ 5.9 ns, ensuring reliable setup/hold timing margins in high-speed synchronous systems. The 74LVTH574DB,118 achieves this performance while maintaining full 3-state control and bus-hold functionality.
Does the 74LVTH574DB,118 support 5 V tolerant inputs or outputs?
Yes, the 74LVTH574DB,118 supports 5 V-tolerant outputs - its VO rating extends to +7.0 V in both HIGH and OFF-states, allowing safe connection to 5 V buses without level shifters. Inputs accept VI up to +5.5 V (per recommended conditions) and +7.0 V (absolute max), but are not 5 V logic-level compatible without external translation; VIH is specified at ≥2.0 V, making it TTL-compatible but not native 5 V CMOS.
How does the bus-hold feature work on the 74LVTH574DB,118, and what design benefit does it provide?
The 74LVTH574DB,118 integrates bus-hold circuitry on all D0–D7 inputs, drawing IBHH = −75 to −150 µA at VI = 2.0 V (VCC = 3.0 V) to actively retain the last valid logic state when inputs float. This eliminates the need for external pull-up or pull-down resistors, reducing component count, PCB area, and potential noise coupling - especially valuable in systems with sparsely populated data buses or hot-pluggable modules where inputs may be temporarily un-driven.
What is the function of pin 1 (OE) on the 74LVTH574DB,118, and how does it interact with the clock signal?
Pin 1 (OE) is the active-LOW output enable input that controls all eight Q0–Q7 outputs independently of the clock (CP). When OE is LOW, outputs reflect the registered Dn values; when OE is HIGH, outputs enter high-impedance OFF-state regardless of CP activity or register content. This decoupling allows dynamic bus sharing without clock synchronization, enabling clean read/write arbitration in multi-master systems using the 74LVTH574DB,118.
Is the 74LVTH574DB,118 suitable for industrial temperature applications?
Yes, the 74LVTH574DB,118 is fully specified for operation from −40 °C to +85 °C, meeting industrial temperature requirements. Its electrical characteristics - including propagation delay, output drive, and bus-hold current - are guaranteed across this full range, and it incorporates latch-up protection (JESD78 Class II >500 mA) and ESD robustness (HBM >2000 V) essential for reliability in factory automation, motor control, and outdoor infrastructure deployments using the 74LVTH574DB,118.
74LVTH574DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74LVTH574DB,118 FAQ
1.How can I place an order for 74LVTH574DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVTH574DB,118 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 74LVTH574DB,118 reliable?
The price and inventory of 74LVTH574DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH574DB,118 is usually 5 days.
3.What payment methods are accepted for 74LVTH574DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVTH574DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVTH574DB,118?
74LVTH574DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVTH574DB,118 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 74LVTH574DB,118?
For technical support, including 74LVTH574DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH574DB,118 requirements.
6.How does Aetrix verify that 74LVTH574DB,118 is sourced from the original manufacturer or authorized distributors?
All 74LVTH574DB,118 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 74LVTH574DB,118 meets industry standards.
7.What is the process for return or replacement of 74LVTH574DB,118?
All 74LVTH574DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH574DB,118, 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 74LVTH574DB,118 part is unused and in its original packaging.
Return procedure for 74LVTH574DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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