Texas Instruments SN74LVC1G74DCURG4

Overview

SN74LVC1G74DCURG4 from Texas Instruments is a single positive-edge-triggered D-type flip-flop with asynchronous clear (CLR) and preset (PRE), designed for 1.65-V to 5.5-V V_CC operation. It delivers 5.9-ns maximum propagation delay at 3.3-V, ±24-mA output drive, and supports voltage-level translation (e.g., 5-V inputs to 3.3-V outputs). It serves as a compact, low-power storage element in timing-critical digital control paths such as LED display row drivers and I/O expander state latching.

For engineers reviewing the SN74LVC1G74DCURG4 datasheet, SN74LVC1G74DCURG4 pinout, SN74LVC1G74DCURG4 application, or SN74LVC1G74DCURG4 equivalent, key selection considerations include its VSSOP-8 (DCU) package footprint, I_off support for live insertion and partial-power-down, guaranteed operation from –40°C to 125°C, and compatibility with mixed-voltage system interfaces requiring overvoltage-tolerant inputs up to 5.5-V.

Technical Context

This device implements a synchronous edge-triggered storage cell with dual asynchronous controls: active-low PRE sets Q high, active-low CLR resets Q low-both overriding clock and data. Its internal logic uses CMOS technology with balanced output drive and no internal pull-ups or pull-downs on inputs, requiring external biasing of unused pins per TI's SCBA004 guidance.

It features I_off circuitry that disables outputs during power-down, preventing backflow current, and supports down-translation across V_CC domains (e.g., 5-V input signals into 1.8-V or 3.3-V systems). Clock triggering is level-sensitive-not edge-slope-dependent-ensuring robust operation even with slow-rising clocks meeting Δt/Δv ≤ 10 ns/V at 3.3-V.

Key Specifications

Pinout & Package

VSSOP-8 (DCU) package: 2.30 mm × 2.00 mm body, 0.5-mm lead pitch, exposed pad not present, RoHS-compliant NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G74DCUR and 74LVC1G74GW,125, the SN74LVC1G74DCURG4 uniquely combines 125°C operation, I_off-enabled hot-swap safety, and TI's G4 green marking - making it the sole option qualified for automotive-grade I/O latching and industrial field-replaceable modules.

Availability

SN74LVC1G74DCURG4 is available at Aetrix Electronics and suitable for LED display row control, motor driver enable sequencing, network switch port state latching, and I/O expander output register applications requiring stable component supply across automotive, industrial, and telecom product lifecycles.

Supply support for SN74LVC1G74DCURG4 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 decades of expertise in high-reliability logic families and advanced packaging technologies.

The SN74LVC1G74 series belongs to TI's LVC (Low-Voltage CMOS) logic portfolio, engineered for low-voltage, high-speed, mixed-signal interfacing in space- and power-constrained systems - particularly targeting industrial automation, communications infrastructure, and automotive electronics.

FAQ

What is the maximum clock frequency supported by SN74LVC1G74DCURG4?

The SN74LVC1G74DCURG4 supports a maximum clock frequency of 200 MHz at V_CC = 5 V and –40°C to 125°C ambient temperature. At 3.3-V operation, the maximum frequency is 175 MHz under the same temperature range. These values derive from the minimum clock pulse width (t_w) and propagation delay (t_pd) specifications in the official TI datasheet SCES794G, ensuring reliable edge-triggered operation without setup/hold violations.

Does SN74LVC1G74DCURG4 support partial power-down, and how is it implemented?

Yes, SN74LVC1G74DCURG4 supports partial power-down via its I_off feature. When V_CC is at 0 V, the I_off circuitry actively disables all outputs, limiting leakage current to ±10 µA and blocking damaging backflow current from other powered rails. This enables safe live insertion and system-level power gating - critical in modular telecom and industrial equipment where subsystems power up/down independently.

What package type and dimensions does SN74LVC1G74DCURG4 use?

SN74LVC1G74DCURG4 uses the VSSOP-8 (DCU) package: 2.30 mm × 2.00 mm body size, 0.5-mm lead pitch, and 1.0-mm maximum height. It features a standard gull-wing leadform with NiPdAu surface finish, RoHS-compliant, and MSL Level-1 (260°C peak reflow). This package is distinct from the larger SSOP (DCT) and smaller X2SON (DQE) variants in the same family.

Can SN74LVC1G74DCURG4 interface with 5-V logic while operating at 3.3-V V_CC?

Yes, SN74LVC1G74DCURG4 accepts input voltages up to 5.5-V regardless of V_CC, enabling direct connection to 5-V TTL or CMOS outputs while powered from a 3.3-V rail. This voltage-level translation capability eliminates external level shifters in mixed-voltage systems - confirmed by TI's "Allow down voltage translation" feature description and absolute maximum input voltage rating of 6.5-V.

What is the operating temperature range for SN74LVC1G74DCURG4?

The SN74LVC1G74DCURG4 is specified for operation from –40°C to +125°C ambient temperature. This extended range is validated for the DCU package variant and applies across the full recommended V_CC range (1.65 V to 5.5 V). It qualifies the device for under-hood automotive, industrial motor drives, and base station RF module applications where thermal stress exceeds commercial-grade limits.