Texas Instruments 74AC11074D

Overview

74AC11074D from Texas Instruments is a dual positive-edge-triggered D-type flip-flop IC in SOIC-14 package, operating from −40°C to 85°C with 5-V supply, 125-MHz max clock frequency, and ±24-mA output drive. It implements synchronous data storage with independent preset (PRE) and clear (CLR) inputs per flip-flop, used in digital control logic, state machines, and clock-domain synchronization.

For engineers reviewing the 74AC11074D datasheet, 74AC11074D pinout, 74AC11074D application, or 74AC11074D equivalent, key selection criteria include edge-trigger timing (tsu = 3.5 ns @ 5 V), rail-to-rail input compatibility (VIH/VIL defined at 3.15 V/1.35 V), low propagation delay (tPLH/tPHL ≤ 7.5 ns), and latch-up immunity (500 mA @ 125°C).

Technical Context

This device integrates two independent D-type flip-flops sharing no internal coupling-each with dedicated PRE, CLR, CLK, D, Q, and Q̅ terminals. Clock triggering occurs at a fixed voltage threshold, not dependent on rise time, enabling robust operation under varying signal slew rates.

It uses TI's EPIC™ (Enhanced-Performance Implanted CMOS) 1-µm process, delivering high noise immunity via center-pin VCC/GND configuration and 500-mA latch-up resistance. The design supports asynchronous set/reset override and meets ANSI/IEEE Std 91-1984 logic symbol conventions.

Key Specifications

Pinout & Package

74AC11074D is housed in a 14-pin plastic small-outline integrated circuit (SOIC-D) package, 8.75 mm × 4.0 mm footprint, 1.75 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AC11074D, 74ACT1074D offers stronger TTL output compatibility but same timing and package; SN74LVC2G74DCTR trades SOIC-14 size and 5-V headroom for ultra-compact form factor and wider voltage flexibility - neither is pin-compatible, but both serve overlapping dual-DFF functional roles.

Availability

74AC11074D is available at Aetrix Electronics and suitable for industrial control, test equipment, and motor drive applications requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for 74AC11074D 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 74AC logic family was engineered for high-speed, low-power, TTL-compatible CMOS operation in industrial control and instrumentation systems - emphasizing noise immunity, wide supply tolerance, and robust latch-up performance.

FAQ

What is the maximum clock frequency supported by the 74AC11074D?

The 74AC11074D supports a maximum clock frequency of 125 MHz when operated at VCC = 5 V and TA = 25°C, as specified in the timing requirements table. This rating assumes proper setup/hold timing compliance and load conditions per the datasheet test setup (CL = 50 pF). At VCC = 3.3 V, the max clock drops to 100 MHz due to reduced drive strength and propagation speed.

Does the 74AC11074D have built-in ESD protection, and what is its rating?

The 74AC11074D incorporates standard CMOS input protection diodes and meets JEDEC JS-001 Class 2 (≥2 kV HBM) ESD robustness per TI's manufacturing qualification. While not explicitly rated in the SCAS499A datasheet, its EPIC™ process and 500-mA latch-up immunity correlate with typical industrial-grade ESD resilience. No external protection is required for board-level handling under normal conditions.

Can the 74AC11074D operate reliably at 3.3 V, and what are the key trade-offs?

Yes, the 74AC11074D is fully characterized for 3-V to 5.5-V operation and functions reliably at 3.3 V. Key trade-offs include reduced max clock frequency (100 MHz vs. 125 MHz), slightly longer propagation delays (≤11.3 ns vs. ≤7.5 ns), and lower output drive (±12 mA vs. ±24 mA at 5 V). Input thresholds scale proportionally, maintaining TTL compatibility.

Is the 74AC11074D pin-compatible with older 74LS or 74HC variants?

No, the 74AC11074D is not pin-compatible with 74LS107 or 74HC107 devices. Although all are dual D-type flip-flops in 14-pin packages, pin assignments differ significantly - e.g., 74LS107 places VCC at Pin 14 and GND at Pin 7, whereas 74AC11074D uses center-pin VCC (Pin 11) and GND (Pin 4). Layout reuse requires full schematic and footprint revision.

What does the "D" suffix indicate in the 74AC11074D part number?

The "D" suffix in 74AC11074D denotes the SOIC (Small Outline Integrated Circuit) package type per TI's packaging nomenclature. It specifies a 14-pin, 300-mil body width, gull-wing leaded package with 1.27-mm pitch - distinct from "N" (PDIP) and "PW" (TSSOP) variants. The ordering row 74AC11074DR.A confirms this is a tape-and-reel variant of the SOIC-D package.