Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Logic > Flip Flops

NXP Semiconductors 74LVT574DB,112

Name: 74LVT574DB,112
Brand: NXP Semiconductors
SKU: 74LVT574DB,112
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 74LVT574DB,112

Manufacturer:: NXP Semiconductors

Category:: Flip Flops

Package:: 20-SSOP (0.209", 5.30mm Width)

Datasheet:: 74LVT574DB,112.pdf

Description:: IC FF D-TYPE SNGL 8BIT 20SSOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,275

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

74LVT574DB,112 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 microprocessor data buses, with propagation delays as low as 1.7 ns (t_PLH) at 3.0–3.6 V and operation across −40 °C to +85 °C.

For engineers reviewing the 74LVT574DB,112 datasheet, 74LVT574DB,112 pinout, 74LVT574DB,112 application, or 74LVT574DB,112 equivalent, key selection criteria include 3-state bus interface capability, TTL-compatible I/O levels, bus hold inputs eliminating external pull-ups, live insertion support, and compatibility with 5 V-tolerant systems while operating at 3.3 V supply.

Technical Context

This device implements eight independent D-type flip-flops synchronized to the rising edge of CP, each capturing the state of its D_n input one setup time before the clock transition. The outputs feed into a common 3-state buffer array controlled solely by OE - independent of clock activity - enabling deterministic bus release without clock dependency.

It features integrated bus hold circuitry on all data inputs (D₀–D₇), providing ±75–150 µA holding current at 3.0 V to maintain valid logic states on unused or floating lines. Input and output voltage tolerances extend to 5.5 V, supporting mixed-voltage interfacing with legacy 5 V systems while powered at 3.3 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage (V_CC)	2.7 V to 3.6 V - ensures stable operation in modern 3.3 V logic domains with ±0.3 V margin
Max Clock Frequency (f_max)	150 MHz - supports high-speed data capture in memory interfaces and bus controllers
Propagation Delay (t_PLH/t_PHL)	1.7–5.4 ns - enables sub-ns timing margins in synchronous 100+ MHz designs
Output Drive (I_OL/I_OH)	±32 mA - sufficient to drive heavily loaded 3-state buses, MOS memories, and microprocessor data lines
Input Voltage Range (V_I)	0 V to 5.5 V - allows direct connection to 5 V logic without level shifters
Operating Temperature	−40 °C to +85 °C - qualified for industrial-grade embedded and communications equipment
Bus Hold Current	±75–150 µA - eliminates need for external pull-up/pull-down resistors on unused inputs

Pinout & Package

74LVT574DB,112 uses the SSOP20 (SOT339-1) package: plastic shrink small outline, 20 leads, body width 5.3 mm, pitch 0.65 mm.

Pin/Terminal	Circuit Role	Design Meaning
1 (OE)	Active-low output enable	Asserting LOW enables Q₀–Q₇ outputs; HIGH places all outputs in high-impedance OFF-state regardless of clock or data
2–9 (D₀–D₇)	Data inputs	Edge-triggered inputs with bus hold; tolerate 0–5.5 V and require setup/hold times of 2.0/0.3 ns (V_CC = 3.0–3.6 V)
10 (GND)	Ground reference	0 V return path for all internal logic and I/O; must be low-impedance for signal integrity
11 (CP)	Clock input	Rising-edge sensitive; minimum pulse width 3.3 ns; drives all eight flip-flops synchronously
12–19 (Q₀–Q₇)	Registered outputs	3-state buffered outputs; reflect D_n state captured at prior CP rising edge when OE = LOW
20 (V_CC)	Supply voltage	3.3 V nominal supply; accepts 2.7–3.6 V; decoupling capacitor required near pin

Key Features

Feature	Design Value
TTL-compatible I/O levels	Ensures interoperability with legacy 5 V TTL and CMOS systems without level translation
Integrated bus hold on all D inputs	Eliminates external pull-up resistors and prevents floating-input metastability in unconnected or unterminated buses
Live insertion/extraction support	Enables hot-swap capability in backplane and modular systems without damaging the device or host
Power-up 3-state and reset	Guarantees outputs remain high-impedance during power ramp-up, preventing bus contention at startup
Latch-up protection (JESD78 Class II)	Withstands >500 mA latch-up current, ensuring robustness in noisy industrial environments

Applications

Microprocessor Data Bus Interface	Memory Address/Data Latching
Use Scenario: Interfacing an 8-bit microcontroller data bus to peripheral ICs with asynchronous timing or slower response. IC Role / Device Role / Timing Role: Acts as a registered bus transceiver - captures CPU write data on CP rising edge and presents it to peripherals via 3-state outputs enabled by OE. Use Value: Prevents bus contention during read-modify-write cycles and isolates peripherals when not selected, improving system reliability.	Use Scenario: Latching address or data signals for SRAM, EPROM, or FPGA configuration interfaces where timing margins are tight. IC Role / Device Role / Timing Role: Provides edge-aligned, glitch-free storage of address/data bits synchronized to system clock edges. Use Value: Enables reliable handshaking with memory devices requiring setup/hold compliance; t_PLH ≤ 5.4 ns meets fast-access memory timing.
Industrial I/O Expansion Module	Digital Signal Acquisition Buffer
Use Scenario: Adding isolated digital I/O channels to PLC or motion controller modules using shared backplane buses. IC Role / Device Role / Timing Role: Buffers and registers sensor/actuator control signals, with OE coordinated by host processor for channel selection. Use Value: Bus hold inputs prevent spurious transitions on unterminated I/O lines; 3-state outputs allow multiple modules to share one data bus.	Use Scenario: Capturing parallel outputs from ADCs or digital sensors before serial transmission or processing. IC Role / Device Role / Timing Role: Synchronizes asynchronous sensor data to a system clock domain and holds values until read by host MCU. Use Value: Reduces sampling jitter; ±32 mA drive strength supports long PCB traces or multiple downstream loads without buffering.

Microprocessor Data Bus Interface

Memory Address/Data Latching

Use Scenario: Interfacing an 8-bit microcontroller data bus to peripheral ICs with asynchronous timing or slower response.

IC Role / Device Role / Timing Role: Acts as a registered bus transceiver - captures CPU write data on CP rising edge and presents it to peripherals via 3-state outputs enabled by OE.

Use Value: Prevents bus contention during read-modify-write cycles and isolates peripherals when not selected, improving system reliability.

Use Scenario: Latching address or data signals for SRAM, EPROM, or FPGA configuration interfaces where timing margins are tight.

IC Role / Device Role / Timing Role: Provides edge-aligned, glitch-free storage of address/data bits synchronized to system clock edges.

Use Value: Enables reliable handshaking with memory devices requiring setup/hold compliance; t_PLH ≤ 5.4 ns meets fast-access memory timing.

Industrial I/O Expansion Module

Digital Signal Acquisition Buffer

Use Scenario: Adding isolated digital I/O channels to PLC or motion controller modules using shared backplane buses.

IC Role / Device Role / Timing Role: Buffers and registers sensor/actuator control signals, with OE coordinated by host processor for channel selection.

Use Value: Bus hold inputs prevent spurious transitions on unterminated I/O lines; 3-state outputs allow multiple modules to share one data bus.

Use Scenario: Capturing parallel outputs from ADCs or digital sensors before serial transmission or processing.

IC Role / Device Role / Timing Role: Synchronizes asynchronous sensor data to a system clock domain and holds values until read by host MCU.

Use Value: Reduces sampling jitter; ±32 mA drive strength supports long PCB traces or multiple downstream loads without buffering.

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
74LVTH574DB,112	Higher drive strength (±64 mA vs. ±32 mA); identical pinout, timing, and bus hold	Better suited for heavier capacitive loads or longer traces; otherwise drop-in compatible	Select when higher output current or faster edge rates are required without layout change
SN74LVC574APW	TI part in TSSOP20; 1.65–3.6 V V_CC; no bus hold; lower I_OL/I_OH (±24 mA)	Lacks bus hold, requiring external termination; wider V_CC range but less drive	Choose only if dual-supply flexibility is critical and bus hold is managed externally

Compared with 74LVTH574DB,112, the original offers adequate drive for most 3.3 V bus applications at lower power, while SN74LVC574APW trades off bus hold and drive strength for broader supply range - making 74LVT574DB,112 optimal for cost-sensitive, industrial 3.3 V systems requiring robust floating-input handling.

Availability

74LVT574DB,112 is available at Aetrix Electronics and suitable for industrial control systems, embedded microprocessor interfaces, and memory subsystems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for 74LVT574DB,112 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74LVT574DB,112 belongs to NXP's high-speed LVT logic family, designed specifically for 3.3 V systems requiring TTL-compatible interfacing, low-skew registration, and robust bus isolation in noise-prone industrial environments.

FAQ

What is the recommended supply voltage range for the 74LVT574DB,112?

The 74LVT574DB,112 is specified for operation between 2.7 V and 3.6 V. Operation outside this range may cause functional failure or reduced noise immunity. At 2.7 V, maximum clock frequency drops to 120 MHz and propagation delays increase slightly; full 150 MHz performance requires V_CC ≥ 3.0 V. Always use local 100 nF ceramic decoupling at the V_CC pin.

Does the 74LVT574DB,112 support 5 V tolerant inputs?

Yes, the 74LVT574DB,112 accepts input voltages from 0 V to 5.5 V on all pins (D₀–D₇, CP, OE), making it fully 5 V tolerant while operating at 3.3 V V_CC. This allows direct interfacing with legacy 5 V logic without level shifters. Output voltage swing remains rail-to-rail within V_CC limits, not 5 V.

How does the bus hold feature work on the 74LVT574DB,112?

The 74LVT574DB,112 integrates bus hold circuitry on all D₀–D₇ inputs, providing ±75–150 µA holding current at 3.0 V to maintain the last-valid logic state when inputs float. This eliminates external pull-up/pull-down resistors and prevents metastability in unterminated or high-impedance bus configurations - a key advantage in modular I/O systems.

What is the function of the OE pin on the 74LVT574DB,112?

The OE (output enable) pin on the 74LVT574DB,112 is an active-low control that independently enables or disables all eight Q₀–Q₇ outputs, regardless of clock activity. When OE = LOW, outputs reflect registered data; when OE = HIGH, all outputs enter high-impedance OFF-state - essential for multi-drop bus arbitration and preventing contention in shared-data-path architectures.

Is the 74LVT574DB,112 pin-compatible with other packages in the same family?

Yes, the 74LVT574DB,112 (SSOP20) shares identical pinout and functionality with 74LVT574D (SO20), 74LVT574PW (TSSOP20), and 74LVT574BQ (DHVQFN20). All variants use the same pin numbering, signal assignments, and electrical behavior - allowing direct PCB footprint substitution where mechanical constraints permit.

74LVT574DB,112 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: 74LVT

Package/Case:: 20-SSOP (0.209", 5.30mm Width)

Packaging:: Tube

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-SSOP

74LVT574DB,112 FAQ

1.How can I place an order for 74LVT574DB,112 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVT574DB,112 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 74LVT574DB,112 reliable?

The price and inventory of 74LVT574DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT574DB,112 is usually 5 days.

3.What payment methods are accepted for 74LVT574DB,112?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT574DB,112 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVT574DB,112?

74LVT574DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVT574DB,112 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 74LVT574DB,112?

For technical support, including 74LVT574DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT574DB,112 requirements.

6.How does Aetrix verify that 74LVT574DB,112 is sourced from the original manufacturer or authorized distributors?

All 74LVT574DB,112 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 74LVT574DB,112 meets industry standards.

7.What is the process for return or replacement of 74LVT574DB,112?

All 74LVT574DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT574DB,112, 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 74LVT574DB,112 part is unused and in its original packaging.

Return procedure for 74LVT574DB,112:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…