Diodes Incorporated 74LVC374AT20-13

Overview

74LVC374AT20-13 from Diodes Incorporated is an octal D-type flip-flop with 3-state outputs in TSSOP-20 package, designed for bus interfacing and I/O port expansion. It operates from 1.65V to 3.6V, delivers ±24mA output drive at VCC = 3.0V, and features IOFF partial power-down support. Used in PC peripheral interfaces and bidirectional data buses where level-shifting and bus contention control are required.

For engineers reviewing the 74LVC374AT20-13 datasheet, 74LVC374AT20-13 pinout, 74LVC374AT20-13 application, or 74LVC374AT20-13 equivalent, key selection criteria include 3-state timing (tEN/tDIS ≤ 9.0ns at 3.3V), mixed-voltage input tolerance (up to 5.5V), Schmitt-trigger inputs, and thermal resistance (θJA = 74°C/W) for compact board layouts.

Technical Context

This device implements eight edge-triggered D latches synchronized on the rising edge of CLK, with independent 3-state control via OE. Each latch retains state during OE assertion, enabling data hold while isolating bus lines. Internal logic uses CMOS technology with rail-to-rail input voltage acceptance (0–5.5V) and output compliance across 1.65–3.6V supply range.

IOFF circuitry ensures sub-20μA leakage when VCC = 0V, supporting hot-swap and partial power-down systems. All inputs feature Schmitt-trigger action for noise immunity, and outputs exhibit low ground bounce (VOLP < 0.8V) and high dynamic VOH (>2.0V) at 3.3V, critical for clean signal integrity in high-speed digital buses.

Key Specifications

Pinout & Package

TSSOP-20 package: 6.4mm × 6.5mm × 1.2mm body, 0.65mm lead pitch, exposed pad not present. RoHS-compliant, halogen-free "Green" construction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop with 3-state output applications.

Compared with SN74LVC374APWRE4, the 74LVC374AT20-13 offers IOFF protection and lower standby current, making it superior for battery-backed or hot-pluggable systems; versus the QFN variant, it trades thermal efficiency for easier hand-soldering and broader reflow compatibility in standard SMT lines.

Availability

74LVC374AT20-13 is available at Aetrix Electronics and suitable for PC peripheral interfaces, embedded I/O expansion, and hard disk drive controller designs requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for 74LVC374AT20-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for computing, industrial, and consumer markets.

The 74LVC374A belongs to Diodes' LVC logic family, engineered for low-voltage operation (1.65–3.6V), mixed-signal interoperability, and robust bus-driving capability in space- and power-constrained digital systems.

FAQ

What is the maximum clock frequency supported by the 74LVC374AT20-13?

The device supports up to 125MHz maximum frequency at VCC = 3.3V and TA = +25°C, with guaranteed minimum 80MHz operation across -40°C to +125°C ambient range. This is validated by tW (minimum pulse width) of 3.0ns and tSU/tH timing margins under worst-case voltage and temperature conditions.

Can the 74LVC374AT20-13 safely interface with 5V logic inputs?

Yes - all inputs accept voltages up to 5.5V regardless of VCC level, enabling direct connection to 5V microcontrollers or legacy peripherals without external level-shifting circuitry. This is confirmed by VI absolute maximum rating and recommended operating condition tables in DS35895 Rev. 1-2.

Does the 74LVC374AT20-13 support hot-swap or partial power-down operation?

Yes - IOFF functionality ensures sub-20μA leakage current when VCC = 0V, allowing safe insertion/removal while other system rails remain active. This behavior is explicitly characterized in the Electrical Characteristics table under IOFF Power Down Leakage Current parameter.

How does the Schmitt-trigger input improve noise immunity?

Schmitt-trigger action provides hysteresis (typically 0.3–0.5V) at each input, rejecting noise spikes below the threshold delta and preventing false triggering from slow-rising or undershoot-prone signals. This is especially critical for CLK and OE inputs in electrically noisy environments like PC motherboards or industrial controllers.