Texas Instruments SN74LV374ATRGYRG4

Overview

SN74LV374ATRGYRG4 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 4.9 ns typical propagation delay 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 SN74LV374ATRGYRG4 datasheet, SN74LV374ATRGYRG4 pinout, SN74LV374ATRGYRG4 application, or SN74LV374ATRGYRG4 equivalent, key selection criteria include 3-state output timing (ten/tdis), clock-to-Q propagation (tpd), Ioff current rating (<5 µA), and RGY package thermal impedance (37 °C/W).

Technical Context

This device implements eight independent D-type latches triggered on the rising edge of CLK, with synchronous data capture and asynchronous 3-state control via OE. Each output drives up to ±16 mA at VCC = 4.5–5.5 V and exhibits low ground bounce (VOLP < 0.8 V) and undershoot (VOHV > 2.3 V) at 5 V.

The Ioff circuitry disables all outputs when VCC = 0 V, preventing backflow current during partial power-down. Input voltage tolerance extends to –0.5 V to 7 V, and mixed-mode operation allows interfacing with 3.3-V logic while powered from 5 V.

Key Specifications

Pinout & Package

SN74LV374ATRGYRG4 is housed in a 20-pin QFN package (RGY) with exposed thermal pad, 0.4-mm pitch, and 3.5 mm × 4.5 mm footprint. The package provides low thermal resistance (37 °C/W) and supports reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV374ATRGYRG4, SN74LVC374APWR offers faster timing in 3.3-V systems but lacks 5-V compatibility and Ioff, while 74ACT374SCX delivers higher drive and speed in pure 5-V designs but sacrifices power-down safety and noise immunity.

Availability

SN74LV374ATRGYRG4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, test equipment pattern generation, and industrial HMI display interfaces requiring stable component supply and long-term lifecycle support.

Supply support for SN74LV374ATRGYRG4 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 connectivity solutions, with decades of experience in high-reliability logic and interface ICs.

The SN74LV374ATRGYRG4 belongs to TI's LV family of low-voltage, high-speed logic devices engineered for robust 5-V industrial and automotive bus interface applications with enhanced noise immunity and power-down safety.

FAQ

What is the maximum clock frequency supported by SN74LV374ATRGYRG4?

The SN74LV374ATRGYRG4 supports up to 85 MHz at CL = 15 pF and VCC = 5 V, with guaranteed minimum fclock of 70 MHz over the full –40°C to 125°C operating range. This frequency limit is defined by timing parameters including tsu, th, and tpd, and assumes proper PCB layout and load capacitance control.

Does SN74LV374ATRGYRG4 support partial power-down operation?

Yes, SN74LV374ATRGYRG4 includes Ioff circuitry that disables outputs and limits reverse current to less than 5 µA when VCC = 0 V. This feature enables safe partial-power-down operation in systems with mixed supply domains or hot-swap capability, as confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions tables.

What is the function of the OE pin on SN74LV374ATRGYRG4?

The OE (output enable) pin on SN74LV374ATRGYRG4 is an active-low control that places all eight Q outputs in high-impedance state when asserted high. It operates asynchronously and does not affect internal latch operation - data can be captured on CLK edges while outputs remain tri-stated, enabling flexible bus arbitration.

Can SN74LV374ATRGYRG4 interface directly with 3.3-V logic inputs?

Yes, SN74LV374ATRGYRG4 accepts 3.3-V logic levels on its D and CLK inputs because its VIH threshold is 2.0 V (min) and VIL is 0.8 V (max) at VCC = 4.5–5.5 V. This TTL-compatible input structure allows direct connection to 3.3-V microcontrollers without level-shifting components.

What package type and thermal characteristics apply to SN74LV374ATRGYRG4?

SN74LV374ATRGYRG4 uses the RGY package: a 20-pin QFN with 0.4-mm pitch, 3.5 mm × 4.5 mm body, and exposed thermal pad. Its junction-to-ambient thermal resistance (qJA) is 37 °C/W, enabling reliable operation at full speed in industrial ambient temperatures up to 125°C with minimal heatsinking.