Texas Instruments SN74LVC2G74DCUTG4

Overview

SN74LVC2G74 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 operation, featuring 5.9 ns max propagation delay at 3.3 V, ±24 mA output drive, and Ioff support for live insertion and partial-power-down applications - used in LED display timing control, network switch data latching, and motor driver state synchronization.

For engineers reviewing the SN74LVC2G74 datasheet, SN74LVC2G74 pinout, SN74LVC2G74 application, or SN74LVC2G74 equivalent, key selection criteria include its dual asynchronous control inputs, 8-pin VSSOP (DCU) package footprint, guaranteed operation from –40°C to +125°C, and compatibility with mixed-voltage systems via 5.5 V-tolerant inputs.

Technical Context

This device implements a synchronous edge-triggered storage element with independent active-low asynchronous set/reset logic. Its clock input triggers on the positive voltage threshold (not edge rate), enabling robust timing across varying slew rates. The Ioff circuitry actively disables outputs during power-down to block back-drive current, satisfying JESD78 Class II latch-up and JESD22 ESD requirements.

It supports voltage translation: inputs tolerate up to 5.5 V regardless of VCC (e.g., 5 V logic driving 3.3 V or 1.8 V domains), while outputs swing rail-to-rail within the supply range. The dual complementary outputs (Q and Q) provide simultaneous non-inverted and inverted latched states without external inversion.

Key Specifications

Pinout & Package

SN74LVC2G74DCUTG4 uses the 8-pin VSSOP (DCU) package, measuring 2.30 mm × 2.00 mm with 0.5 mm pitch, optimized for space-constrained PCB layouts in portable and dense embedded systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC2G74DCUTG4, SN74LVC1G74DBVR saves board space but sacrifices Q output functionality, while 74LVC2G74GW,125 offers identical logic with improved thermal dissipation in TSSOP - both require validation of layout clearance and reflow profile compatibility.

Availability

SN74LVC2G74DCUTG4 is available at Aetrix Electronics and suitable for LED display control, network switch data latching, and motor driver state synchronization requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for SN74LVC2G74DCUTG4 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 50 years of innovation in high-reliability digital interfaces and power-efficient logic families.

SN74LVC2G74 belongs to the LVC (Low-Voltage CMOS) logic family, engineered for low-power, high-speed operation across wide voltage ranges - targeting industrial automation, communications infrastructure, and consumer electronics with stringent size and thermal constraints.

FAQ

What is the maximum clock frequency supported by SN74LVC2G74DCUTG4?

SN74LVC2G74DCUTG4 supports up to 200 MHz maximum clock frequency at VCC = 5 V and TA = –40°C to +85°C, and 140 MHz at TA = –40°C to +125°C. These values derive from measured fmax in the TI datasheet SCES203Q, Section 6.8–6.9, and reflect guaranteed operation under recommended conditions with proper load capacitance and signal integrity.

Does SN74LVC2G74DCUTG4 support partial power-down mode?

Yes, SN74LVC2G74DCUTG4 fully supports partial power-down mode via its Ioff feature. When VCC = 0 V, the Ioff circuitry disables outputs, limiting leakage to ±10 μA and blocking damaging back-current - critical for hot-swap systems and multi-rail power sequencing where this device may be unpowered while other ICs remain active.

What package type is used for SN74LVC2G74DCUTG4?

SN74LVC2G74DCUTG4 uses the 8-pin VSSOP (Very Small Outline Package), also designated DCU, with dimensions 2.30 mm × 2.00 mm and 0.5 mm lead pitch. This package is RoHS-compliant, features NIPDAU lead finish, and carries MSL Level-1 rating for unlimited floor life at ≤30°C/60% RH.

Can SN74LVC2G74DCUTG4 interface with 5 V logic while operating at 1.8 V VCC?

Yes, SN74LVC2G74DCUTG4 accepts input voltages up to 5.5 V regardless of VCC level, enabling safe 5 V signal interfacing even when powered at 1.8 V. This voltage translation capability is explicitly verified in TI's datasheet Section 8.3 and eliminates external level shifters in mixed-voltage designs.

What is the purpose of the PRE and CLR pins on SN74LVC2G74DCUTG4?

The PRE (pin 7) and CLR (pin 6) pins on SN74LVC2G74DCUTG4 are active-low asynchronous controls: pulling PRE low forces Q = H and Q = L immediately, while pulling CLR low forces Q = L and Q = H - both actions override clock and data inputs. This enables immediate state initialization or fault recovery independent of system clock timing.