Texas Instruments 74ACT11074DRE4

Overview

74ACT11074DRE4 from Texas Instruments is a dual positive-edge-triggered D-type flip-flop with independent asynchronous preset (PRE) and clear (CLR) inputs, operating at 4.5–5.5 V supply, delivering 100 MHz maximum clock frequency, 5.7 ns typical tPLH/tPHL propagation delay, and TTL-voltage-compatible inputs. It serves as a synchronous storage element in digital control logic, state machines, and data synchronization circuits.

For engineers reviewing the 74ACT11074DRE4 datasheet, 74ACT11074DRE4 pinout, 74ACT11074DRE4 application, or 74ACT11074DRE4 equivalent, this device supports high-speed edge-triggered latching with guaranteed setup/hold timing (tsu = 4.5 ns, th = 0 ns), latch-up immunity up to 500 mA at 125°C, and operation across –40°C to 85°C industrial temperature range.

Technical Context

This IC implements two independent D-type flip-flops in a single 14-pin SOIC package, each featuring active-low asynchronous PRE and CLR inputs that override clocked data transfer. Clock triggering occurs at a defined voltage threshold-not dependent on input slew rate-ensuring robust timing behavior under varying signal rise times.

The device uses TI's EPIC (Enhanced-Performance Implanted CMOS) 1-µm process, enabling TTL-level input compatibility while maintaining CMOS power efficiency. Its center-pin VCC/GND configuration minimizes high-speed switching noise, and its 30 pF typical power-dissipation capacitance per flip-flop supports low dynamic power at 1 MHz.

Key Specifications

Pinout & Package

74ACT11074DRE4 is packaged in a 14-pin plastic small-outline integrated circuit (SOIC-D) with 1.27 mm pitch, 8.75 mm × 3.91 mm body, and 1.75 mm max height. Pin 1 is located at the top-left corner with notch or index mark identification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ACT74DR and 74LVC74AD,118, the 74ACT11074DRE4 uniquely delivers per-section asynchronous PRE/CLR, full 5-V TTL compatibility, and validated –40°C to 85°C operation - making it the only option among the three qualified for legacy 5-V control logic with independent fault recovery per channel.

Availability

74ACT11074DRE4 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, digital audio synchronizers, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74ACT11074DRE4 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 74ACT11074DRE4 belongs to TI's Advanced CMOS Technology (ACT) logic family, designed specifically for high-speed, low-noise 5-V digital systems requiring TTL compatibility and robust industrial reliability.

FAQ

What is the maximum clock frequency supported by the 74ACT11074DRE4?

The 74ACT11074DRE4 supports a maximum clock frequency of 100 MHz across the full operating temperature range (–40°C to 85°C). This specification is verified under recommended conditions (VCC = 4.5–5.5 V) and accounts for worst-case propagation delays and setup/hold timing margins. The 74ACT11074DRE4 achieves this performance using TI's EPIC CMOS process and center-pin power distribution to minimize noise-induced timing uncertainty.

Does the 74ACT11074DRE4 support TTL-level input signals?

Yes, the 74ACT11074DRE4 features TTL-voltage-compatible inputs, with VIH(min) = 2.0 V and VIL(max) = 0.8 V at VCC = 5.5 V. This allows direct connection to standard 74LS, 74F, and microcontroller GPIO outputs without external level-shifting circuitry. The 74ACT11074DRE4 maintains this compatibility while delivering CMOS-level power efficiency and noise immunity.

What is the purpose of the center-pin VCC and GND configuration in the 74ACT11074DRE4 package?

The center-pin VCC (pin 11) and GND (pin 4) arrangement in the 74ACT11074DRE4's SOIC-D package reduces simultaneous switching output (SSO) noise by shortening high-current return paths and minimizing inductive coupling between supply and signal lines. This layout lowers ground bounce by up to 40% compared to corner-supply SOIC variants, improving timing stability in high-speed digital systems. The 74ACT11074DRE4 leverages this feature to maintain reliable 100 MHz operation in noisy industrial environments.

Can the 74ACT11074DRE4 operate outside the standard 5-V supply range?

No - the 74ACT11074DRE4 is specified only for VCC = 4.5 V to 5.5 V. Absolute maximum ratings allow –0.5 V to 6.0 V, but operation outside the recommended range risks timing violations, increased ICC, or undefined logic states. The 74ACT11074DRE4 is not rated for 3.3-V or mixed-voltage operation; for such applications, TI's 74LVC74 series is recommended instead.

How does the asynchronous preset/clear functionality work in the 74ACT11074DRE4?

Each flip-flop in the 74ACT11074DRE4 has dedicated active-low PRE and CLR inputs (pins 1/7 and 10/12) that force Q = H / Q̅ = L (PRE) or Q = L / Q̅ = H (CLR) regardless of clock or data state. These controls override all synchronous behavior and are fully independent per section. The 74ACT11074DRE4 guarantees response within 9.6 ns (max) and supports simultaneous assertion without contention, enabling deterministic system initialization and fault recovery.