Texas Instruments SN74LV374ATDW

Overview

SN74LV374ATDW from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for bus interface and data latching in 5-V digital systems. It operates from 4.5 V to 5.5 V, delivers typical propagation delay of 4.9 ns at 5 V, supports TTL-level inputs, and features Ioff partial-power-down protection. It is used in bidirectional bus drivers and I/O port buffering.

For engineers reviewing the SN74LV374ATDW datasheet, SN74LV374ATDW pinout, SN74LV374ATDW application, or SN74LV374ATDW equivalent, key selection criteria include 3-state output timing (ten/tdis), clock frequency capability up to 90 MHz (CL = 15 pF), input compatibility with TTL logic, thermal performance in SOIC-DW package, and Ioff-enabled system power sequencing.

Technical Context

This device implements eight independent D-type latches triggered on the positive edge of CLK, with synchronous data capture and asynchronous 3-state control via OE. Each output drives high-impedance (Z), high, or low states without affecting internal latch operation - enabling data retention during bus isolation.

It supports mixed-mode voltage operation across all ports, includes robust noise immunity (VOLP < 0.8 V, VOHV > 2.3 V), and meets JESD 17 latch-up (>250 mA) and JESD 22 ESD standards (2000-V HBM). The SOIC-DW package provides 20-pin surface-mount compatibility with JEDEC MS-013 outline and Level-1 MSL rating.

Key Specifications

Pinout & Package

SN74LV374ATDW uses a 20-pin SOIC (DW) package per JEDEC MS-013, 7.5 mm × 12.8 mm body, 2.65 mm max height, with 1.27 mm pitch leads and gull-wing profile. Pin 1 index located at top-left corner (quadrant Q1).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type latch applications.

Compared with SN74LV374ATDW, SN74LVC374APWR offers better speed but mandates 3.3-V infrastructure, while 74ACT374SC delivers raw speed at cost of noise margin and power-down safety - making SN74LV374ATDW optimal for robust 5-V industrial bus interfacing.

Availability

SN74LV374ATDW is available at Aetrix Electronics and suitable for industrial automation controllers, test equipment data acquisition, and automotive diagnostic modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LV374ATDW 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in industrial, automotive, and communications markets.

The SN74LV374ATDW belongs to TI's LV logic family, engineered for low-voltage 5-V operation with enhanced noise immunity and power-down safety - targeting robust bus interface and data latching in harsh environments.

FAQ

What is the maximum clock frequency supported by SN74LV374ATDW at 5 V?

The SN74LV374ATDW supports up to 90 MHz maximum clock frequency when loaded with 15 pF, as specified in the timing requirements table. At 50 pF load, the limit drops to 85 MHz. These values assume VCC = 5 V ± 0.5 V and operation within –40°C to 125°C ambient range. Exceeding these conditions may cause setup/hold violations or metastability.

Does SN74LV374ATDW support partial power-down, and how is it implemented?

Yes, SN74LV374ATDW supports partial power-down via its Ioff circuitry. When VCC = 0 V, the Ioff feature disables all outputs and limits input/output leakage to ≤5 µA across 0–5.5 V, preventing damaging current backflow. This allows safe insertion into live 5-V backplanes without disrupting other powered components on the same bus.

What is the recommended pull-up resistor value for OE on SN74LV374ATDW during power-up?

TI recommends tying OE to VCC through a pull-up resistor to ensure high-impedance outputs at power-up. The minimum resistor value depends on the driver's current-sinking capability; for standard CMOS drivers, 10 kΩ is typical. Lower values (e.g., 4.7 kΩ) improve noise immunity but increase static current - verify against your driver's sink spec in the final design.

Can SN74LV374ATDW interface directly with 3.3-V logic inputs?

Yes, SN74LV374ATDW outputs are compatible with 3.3-V logic inputs: VOH ≥ 3.8 V at –16 mA exceeds 3.3-V VIH (typically 2.0 V), and VOL ≤ 0.55 V satisfies 3.3-V VIL (typically 0.8 V). Its inputs also accept 3.3-V signals as valid TTL levels (VIH = 2 V, VIL = 0.8 V), enabling mixed-voltage interoperation without level shifters.

What package variant does SN74LV374ATDW use, and what are its key mechanical dimensions?

SN74LV374ATDW uses the SOIC-DW package (JEDEC MS-013), a 20-pin surface-mount outline measuring 7.5 mm × 12.8 mm with 1.27 mm lead pitch and 2.65 mm max height. It has gull-wing leads, quadrant Q1 pin 1 indexing, and is rated MSL Level-1 (unlimited floor life at ≤30°C/60% RH), making it suitable for standard reflow assembly without dry-pack requirements.