Texas Instruments 74ACT11074DR

Overview

74ACT11074DR from Texas Instruments is a dual positive-edge-triggered D-type flip-flop with independent asynchronous preset (PRE) and clear (CLR) inputs, designed for synchronous logic control in high-speed digital systems. It operates over –40°C to 85°C, supports 4.5 V–5.5 V supply, delivers 100 MHz max clock frequency, exhibits 1.5 ns typical propagation delay (tPLH/tPHL), and features TTL-voltage-compatible inputs. It is used in clock-synchronized data latching, state machine sequencing, and bus interface control.

For engineers reviewing the 74ACT11074DR datasheet, 74ACT11074DR pinout, 74ACT11074DR application, or 74ACT11074DR equivalent, this page provides verified functional identity, validated SOIC-14 pin mapping, confirmed timing and DC electrical specs, real-world use cases in industrial control and communications logic, and two technically documented alternative parts with precise functional and packaging differences.

Technical Context

This device implements two independent edge-triggered storage elements with fully asynchronous active-low PRE and CLR controls - enabling immediate output override regardless of clock or data state. Its EPIC (Enhanced-Performance Implanted CMOS) 1-μm process ensures robust latch-up immunity (500 mA at 125°C) and low-noise operation via center-pin VCC/GND layout.

Timing behavior is defined by voltage-level clock detection (not edge-rate dependent), with guaranteed 4.5 ns setup time (tsu), zero hold time (th), and 5 ns minimum pulse width for PRE/CLR and CLK. Output drive capability is ±24 mA at VOH/VOL, supporting direct interfacing with TTL and ACT-family logic without level-shifting.

Key Specifications

Pinout & Package

74ACT11074DR is supplied in a 14-pin plastic small-outline integrated circuit (SOIC-D) package, 3.9 mm wide, 8.65 mm long, 1.75 mm max height, with 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, and moisture sensitivity level (MSL) 1 (unlimited floor life at ≤30°C/60% RH).

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 74ACT11074DR uniquely provides per-channel asynchronous preset/clear in a 5 V TTL-compatible package - making it irreplaceable in legacy system upgrades and industrial control where independent fault recovery and mixed-voltage interoperability are design-critical.

Availability

74ACT11074DR is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, and legacy bus interface designs requiring stable component supply, long-term obsolescence mitigation, and full traceability through TI's production lifecycle.

Supply support for 74ACT11074DR 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 U.S.-based semiconductor innovator founded in 1930, delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The 74ACT11074DR belongs to TI's Advanced CMOS (ACT) logic family - engineered for high-speed, low-noise, TTL-compatible digital interfacing in industrial control and instrumentation systems where reliability across temperature and voltage extremes is essential.

FAQ

What is the maximum operating frequency of the 74ACT11074DR?

The 74ACT11074DR is rated for a maximum clock frequency of 100 MHz across the full operating temperature range (–40°C to +85°C). This value is guaranteed under recommended conditions (VCC = 4.5 V to 5.5 V) and reflects the highest rate at which reliable positive-edge-triggered data transfer occurs without violating setup or hold timing margins. Measured fmax reaches 125 MHz at TA = 25°C, but 100 MHz is the production-tested specification.

Does the 74ACT11074DR support 3.3 V operation?

No, the 74ACT11074DR is not specified for 3.3 V operation. Its recommended supply voltage range is strictly 4.5 V to 5.5 V, and absolute maximum ratings limit VCC to 6 V. Attempting to operate the 74ACT11074DR below 4.5 V may result in undefined logic thresholds, increased propagation delay, or failure to meet AC timing specifications - particularly the 4.5 ns setup time requirement.

What is the purpose of the center-pin VCC and GND configuration in the 74ACT11074DR package?

The center-pin VCC (Pin 11) and GND (Pin 4) arrangement in the 74ACT11074DR's SOIC-D package minimizes high-speed switching noise by reducing the power/ground loop inductance and improving decoupling effectiveness. This layout lowers simultaneous switching output (SSO) noise, enhances signal integrity in dense PCB layouts, and contributes to the device's stable 100 MHz operation without external bypassing beyond standard 0.1 µF ceramic capacitors.

Can the 74ACT11074DR replace a 74LS112 in an existing design?

The 74ACT11074DR is not a direct functional replacement for the 74LS112, which is a dual JK flip-flop with different logic behavior (JK vs. D-type), distinct pinout, and no shared clock architecture. While both are dual flip-flops with PRE/CLR, the 74ACT11074DR lacks J/K inputs and cannot emulate toggle or memory modes. Replacement requires redesigning the logic function and verifying timing compatibility - it is not a drop-in substitute.

What does "EPIC process" mean for the 74ACT11074DR?

EPIC (Enhanced-Performance Implanted CMOS) is Texas Instruments' proprietary 1-μm CMOS fabrication process used for the 74ACT11074DR. It integrates ion implantation to precisely control threshold voltages, yielding higher speed (100 MHz), superior noise immunity, and 500-mA latch-up immunity at 125°C - significantly exceeding standard CMOS robustness while maintaining TTL-compatible input levels and 5 V operation.