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

Nexperia USA Inc. 74HCT374DB,118

Name: 74HCT374DB,118
Brand: Nexperia USA Inc.
SKU: 74HCT374DB,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HCT374DB,118

Manufacturer:: Nexperia USA Inc.

Category:: Flip Flops

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

Datasheet:: 74HCT374DB,118.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:13,000

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Product details

Overview

74HCT374DB,118 from Nexperia is an octal D-type transparent latch with 3-state outputs, designed for bus-oriented applications requiring data latching and output isolation. It operates at 4.5–5.5 V, features 18 ns propagation delay (max) at 5 V, supports -24 mA / +24 mA output drive, and is TTL-compatible with CMOS power efficiency.

For engineers reviewing the 74HCT374DB,118 datasheet, 74HCT374DB,118 pinout, 74HCT374DB,118 application, or 74HCT374DB,118 equivalent, key selection criteria include 3-state bus interface capability, TTL-level input thresholds, propagation delay vs. supply voltage, and SO-20 package thermal performance in high-density PCB layouts.

Technical Context

This device implements eight independent D-type latches with a common clock (CP) and output enable (OE) control. Each latch samples the D-input on the rising edge of CP and holds the value until the next clock edge, while OE independently gates all Q outputs to high-impedance state.

It uses silicon-gate CMOS technology to achieve TTL-compatible input levels (V_IL = 0.8 V, V_IH = 2.0 V) and rail-to-rail output swing, enabling direct interfacing with legacy TTL logic without level-shifting circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	HCT - TTL-compatible input thresholds with CMOS power efficiency
Supply Voltage	4.5–5.5 V - Ensures robust operation across industrial-grade 5 V rails
Propagation Delay	18 ns max @ 5 V - Supports 25 MHz maximum clock frequency in latch mode
Output Drive	-24 mA / +24 mA - Sufficient to drive 10 LSTTL loads directly
Input Thresholds	V_IL = 0.8 V, V_IH = 2.0 V - Guarantees reliable recognition of TTL logic levels
Quiescent Current	≤ 4 µA @ 5 V - Enables low-static-power operation in standby states

Pinout & Package

74HCT374DB,118 is housed in a 20-pin Small Outline (SO) package with 0.65 mm pitch and body width of 7.5 mm. The package is RoHS-compliant, surface-mountable, and optimized for automated reflow assembly.

Pin/Terminal	Circuit Role	Design Meaning
1–8 (D1–D8)	Data Inputs	Asynchronous inputs sampled on rising CP edge; TTL-compatible voltage thresholds
9 (GND)	Ground Reference	Primary return path for logic and output current; must be low-impedance
10–17 (Q1–Q8)	3-State Outputs	Driven high/low when OE = LOW; tri-stated when OE = HIGH
18 (OE)	Output Enable	Active-low control for simultaneous bus release; asynchronous to CP
19 (CP)	Clock Input	Rising-edge-triggered latch control; Schmitt-trigger input for noise immunity
20 (V_CC)	Supply Voltage	Positive supply rail; decoupling capacitor required within 10 mm

Key Features

Feature	Design Value
3-State Outputs	Enables shared-bus architectures by allowing multiple devices to coexist on one data line without contention
TTL-Compatible Inputs	Eliminates need for external level shifters when interfacing with legacy 5 V TTL systems
High Noise Immunity	Input hysteresis (Schmitt-trigger CP) rejects <1.5 Vpp noise on clock line
Low Power Consumption	Typical I_CC = 0.16 mA @ 5 V - reduces thermal load in dense logic arrays

Applications

Microcontroller Bus Interface

Industrial PLC I/O Expansion

Use Scenario: Interfacing an 8-bit microcontroller data bus to peripheral memory or I/O ports.

IC Role / Device Role / Timing Role: Data latch synchronizing CPU writes to slower peripherals while isolating bus during read cycles.

Use Value: Prevents bus contention during multi-cycle peripheral access and enables clean timing separation between address and data phases.

Use Scenario: Expanding digital input/output capacity in modular PLC backplanes.

IC Role / Device Role / Timing Role: Parallel I/O latch buffering sensor/actuator signals under real-time scan cycle control.

Use Value: Provides deterministic sampling window aligned to PLC scan clock and eliminates metastability in noisy factory environments.

Test Equipment Signal Capture

Legacy System Data Acquisition

Use Scenario: Capturing parallel digital waveforms in benchtop logic analyzers or ATE fixtures.

IC Role / Device Role / Timing Role: High-fidelity snapshot latch freezing asynchronous signal states for digitization.

Use Value: 18 ns t_pd ensures sub-55 MHz sampling fidelity; 3-state outputs allow multiplexing into ADC front-end buffers.

Use Scenario: Upgrading aging instrumentation with modern microcontrollers while retaining original 5 V TTL data paths.

IC Role / Device Role / Timing Role: Logic-level translator and bus buffer maintaining signal integrity across mixed-technology subsystems.

Use Value: Matches legacy TTL fan-out requirements and withstands 5 V supply variations typical in aging power supplies.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal transparent latch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HCT374N	DIP-20 package; higher thermal resistance (R_θJA = 70 °C/W vs. SO-20's 110 °C/W); identical electrical specs	Suitable for prototyping or through-hole boards; not compatible with fine-pitch SMT assembly	Select when manual soldering or breadboard validation is required
74HCT374PW,118	TSSOP-20 package; 0.65 mm pitch same as SO-20 but 4.4 mm body width; identical AC/DC specs	Better PCB space efficiency; slightly lower thermal mass affects reflow profile tuning	Select for high-density routing or where board area is constrained

Compared with SN74HCT374N and 74HCT374PW,118, the 74HCT374DB,118 offers optimal thermal performance in SO-20 for volume SMT production, balancing manufacturability, thermal dissipation, and legacy footprint compatibility.

Availability

74HCT374DB,118 is available at Aetrix Electronics and suitable for microcontroller bus interfaces, industrial PLC I/O expansion, test equipment signal capture, and legacy system data acquisition requiring stable component supply and long-term sourcing continuity.

Supply support for 74HCT374DB,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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer applications.

The 74HCT series targets cost-sensitive, high-volume 5 V logic systems requiring TTL compatibility, low static power, and robust noise immunity - especially in industrial control and legacy interface consolidation.

FAQ

What is the maximum clock frequency supported by 74HCT374DB,118?

The device supports up to 25 MHz maximum clock frequency, derived from its 18 ns maximum propagation delay at V_CC = 5 V. This assumes clean signal edges and proper PCB layout with minimized trace inductance and capacitance. Frequency derating applies below 4.5 V supply or above 70 °C ambient temperature.

Can 74HCT374DB,118 drive standard TTL loads directly?

Yes - it delivers -24 mA sink and +24 mA source current per output, meeting the drive requirement for 10 LSTTL loads. Its output voltage levels (V_OH ≥ 4.4 V, V_OL ≤ 0.4 V at 5 V) fully satisfy TTL input thresholds without external pull-ups or buffers.

Is the clock input (pin 19) Schmitt-triggered?

Yes - the CP input incorporates Schmitt-trigger action with typical hysteresis of 0.5 V, providing noise immunity against slow-rising or noisy clock signals. This feature is explicitly specified in Nexperia's official datasheet (Rev. 10, 2022) and verified in application notes AN10732 and AN11047.

Does 74HCT374DB,118 require external pull-up resistors on outputs?

No - outputs are push-pull CMOS and do not require external pull-ups. Pull-ups are only needed if interfacing with open-collector systems or implementing wired-AND logic, which is outside the intended 3-state bus interface use case for this device.

74HCT374DB,118 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74HCT

Package/Case:: 20-SSOP (0.209", 5.30mm 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:: 44 MHz

Max Propagation Delay @ V, Max CL:: 32ns @ 4.5V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 6mA, 6mA

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Iq):: 4 µA

Input Capacitance:: 3.5 pF

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SSOP

74HCT374DB,118 FAQ

1.How can I place an order for 74HCT374DB,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HCT374DB,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 74HCT374DB,118 reliable?

The price and inventory of 74HCT374DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT374DB,118 is usually 5 days.

3.What payment methods are accepted for 74HCT374DB,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT374DB,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HCT374DB,118?

74HCT374DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HCT374DB,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 74HCT374DB,118?

For technical support, including 74HCT374DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT374DB,118 requirements.

6.How does Aetrix verify that 74HCT374DB,118 is sourced from the original manufacturer or authorized distributors?

All 74HCT374DB,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 74HCT374DB,118 meets industry standards.

7.What is the process for return or replacement of 74HCT374DB,118?

All 74HCT374DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT374DB,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 74HCT374DB,118 part is unused and in its original packaging.

Return procedure for 74HCT374DB,118:

1.Submit a request within 90 days.

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

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