Texas Instruments 74AC11074PWR

Overview

74AC11074PWR from Texas Instruments is a dual positive-edge-triggered D-type flip-flop IC in TSSOP-14 package, operating from −40°C to 85°C with 5-V supply, 125-MHz max clock frequency, and ±24-mA output drive. It features independent preset (PRE) and clear (CLR) inputs per flip-flop, asynchronous control, and EPIC™ CMOS process for latch-up immunity up to 500 mA at 125°C - used in digital logic sequencing, state machine control, and clock-domain synchronization.

For engineers reviewing the 74AC11074PWR datasheet, 74AC11074PWR pinout, 74AC11074PWR application, or 74AC11074PWR equivalent, key selection criteria include asynchronous preset/clear behavior, propagation delay under 8.2 ns (VCC = 5 V), TSSOP-14 thermal and layout constraints, and compatibility with 3.3-V/5-V mixed-signal systems requiring edge-triggered storage elements.

Technical Context

This device implements two independent D-type flip-flops with fully asynchronous active-low PRE and CLR inputs, enabling immediate state override regardless of clock or data. Each flip-flop samples D input on the low-to-high CLK transition while meeting 3.5-ns setup time (VCC = 5 V) and zero hold time.

Its EPIC™ 1-µm CMOS process delivers rail-to-rail VOH/VOL performance (VOH ≥ 4.94 V, VOL ≤ 0.44 V at IO = ±24 mA), 30-pF power dissipation capacitance, and robust noise immunity via center-pin VCC/GND configuration - critical for high-speed digital control in industrial PLCs and test equipment.

Key Specifications

Pinout & Package

TSSOP-14 (PW) package: 4.4 mm × 5.0 mm body, 1.2 mm max height, 0.65-mm lead pitch, moisture sensitivity level 1, RoHS-compliant NIPDAU finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AC74PWR and 74LVC74APW,118, the 74AC11074PWR uniquely supports independent asynchronous control per flip-flop and full industrial temperature compliance - making it the only option for fault-tolerant, dual-channel edge-triggered storage in thermally demanding applications.

Availability

74AC11074PWR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, digital test equipment sequencing, communications backplane control, and motor drive safety logic requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AC11074PWR 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 high-reliability components.

The 74AC logic family was designed for high-speed, low-noise digital control in industrial and instrumentation systems - emphasizing robustness, wide supply range, and predictable timing across temperature.

FAQ

What is the maximum clock frequency supported by the 74AC11074PWR?

The 74AC11074PWR supports a maximum clock frequency of 125 MHz when operated at VCC = 5 V and TA = 25°C. At VCC = 3.3 V, the maximum clock frequency is 100 MHz. These values are guaranteed across the full −40°C to +85°C operating temperature range per the recommended conditions table in the SCAS499A datasheet. The 74AC11074PWR achieves this performance using TI's EPIC™ CMOS process and center-pin VCC/GND layout to minimize switching noise.

Does the 74AC11074PWR support 3.3-V operation?

Yes, the 74AC11074PWR is fully specified for 3.3-V operation: the recommended supply range is 3 V to 5.5 V, and all electrical characteristics - including VIH/VIL thresholds, propagation delay, and output drive - are characterized at VCC = 3.3 V ± 0.3 V. Input thresholds scale with VCC, providing 2.1 V VIH and 0.9 V VIL at 3 V, ensuring reliable interfacing with 3.3-V microcontrollers and FPGAs without level shifters.

How does the 74AC11074PWR handle simultaneous preset and clear assertion?

When both PRE and CLR are low on the same flip-flop, the 74AC11074PWR enters a nonstable state (Q = Q̅ = H), which does not persist once either PRE or CLR returns high. This condition is explicitly documented in the FUNCTION TABLE footnote. The device does not latch or retain this state - it transitions immediately to the defined Q/Q̅ output upon release of either control line, avoiding metastability or undefined behavior in safety-critical sequences.

What is the thermal performance of the 74AC11074PWR in TSSOP-14 package?

The 74AC11074PWR in TSSOP-14 (PW) package has a maximum power dissipation of 0.5 W at TA = 55°C in still air, per the absolute maximum ratings table. Its 1.2-mm max height and exposed pad-free construction limit thermal resistance; junction-to-ambient θJA is approximately 220°C/W. For continuous operation at 85°C ambient, power dissipation should remain below 250 mW - achievable with typical toggle rates under 50 MHz and light capacitive loading.

Is the 74AC11074PWR pin-compatible with other 74AC74-series devices?

No, the 74AC11074PWR is not pin-compatible with standard 74AC74 variants such as SN74AC74PWR. While both use TSSOP-14 packages, the 74AC11074PWR allocates dedicated PRE/CLR pins for each flip-flop (Pins 1, 7, 10, 12), whereas SN74AC74PWR uses shared PRE/CLR (Pins 1, 2, 9, 10). This difference requires PCB layout revision - the 74AC11074PWR pinout is unique to its dual-independent-control architecture.