Texas Instruments 74AC11175DWR

Overview

74AC11175DWR from Texas Instruments is a quad D-type positive-edge-triggered flip-flop with individual direct clear inputs, implemented in EPIC (Enhanced-Performance Implanted CMOS) 1-µm process. It operates from −40°C to 85°C at VCC = 3–5.5 V, delivers 24 mA output drive, and supports up to 125 MHz clock frequency at 5 V - used in synchronous data storage and pattern generation circuits.

For engineers reviewing the 74AC11175DWR datasheet, 74AC11175DWR pinout, 74AC11175DWR application, or 74AC11175DWR equivalent, key selection criteria include setup/hold timing (5.5 ns / 0.5 ns at 5 V), rail-to-rail input voltage tolerance (−0.5 V to VCC + 0.5 V), latch-up immunity (500 mA typical at 125°C), and DW-package thermal performance for high-density logic designs.

Technical Context

This device integrates four independent D-type flip-flops, each with asynchronous active-low CLR and edge-triggered CLK. Each stage transfers D-input data to Q/Q̅ outputs on the rising edge of CLK, with no effect from D when CLK is static.

Designed for flow-through PCB layout, it features center-pin VCC and GND placement to suppress high-speed switching noise. Its EPIC CMOS process ensures low power consumption (ICC = 8–80 µA at 5.5 V), high noise immunity (VIH = 3.15 V min at VCC = 4.5 V), and robust ESD/latch-up resilience.

Key Specifications

Pinout & Package

74AC11175DWR is housed in a 20-pin SOIC (DW) package with 0.300-inch body width and standard JEDEC MS-013 footprint. Pin spacing is 0.050 inch, and thermal resistance (θJA) is 105°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AC11175DWR, 74AC175DWR trades per-stage clear and Q̅ outputs for reduced pin count and cost, while SN74LV175ADWR offers superior noise immunity and quiescent current at the expense of clock speed - making each suitable for distinct trade-off priorities in industrial control versus portable design.

Availability

74AC11175DWR is available at Aetrix Electronics and suitable for industrial PLCs, digital test equipment, serial interface bridges, and embedded pattern generation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AC11175DWR 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 founded in 1930, delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The 74AC logic family was engineered for high-speed, low-power CMOS operation in industrial control and instrumentation - emphasizing noise immunity, latch-up robustness, and wide supply tolerance.

FAQ

What is the maximum clock frequency supported by the 74AC11175DWR?

The 74AC11175DWR supports up to 125 MHz at VCC = 5 V ± 0.5 V and 90 MHz at VCC = 3.3 V ± 0.3 V, as specified in its switching characteristics table. These values assume proper load conditions (CL = 50 pF) and ambient temperature of 25°C. Derating applies at extremes of voltage or temperature - e.g., fMAX drops to ~100 MHz at 85°C and 5 V.

Does the 74AC11175DWR have complementary outputs for each flip-flop stage?

Yes, the 74AC11175DWR provides both true (Q) and complementary (Q̅) outputs for all four flip-flop stages - pins 5–8 are 1Q–4Q, and pins 9–12 are 1Q̅–4Q̅. This eliminates the need for external inverters in applications requiring dual-phase control signals or differential bus driving.

Can the 74AC11175DWR operate reliably at 3.3 V supply voltage?

Yes, the 74AC11175DWR is fully characterized for operation from 3 V to 5.5 V. At VCC = 3.3 V, it delivers 12 mA output drive, supports 90 MHz clocking, and maintains VIH = 2.1 V and VIL = 0.9 V - enabling direct interface with 3.3 V microcontrollers and FPGAs without level translation.

What is the purpose of the multiple VCC and GND pins on the 74AC11175DWR?

The 74AC11175DWR uses three VCC (pins 17, 18, 20) and three GND (pins 14, 15, 16) pins to minimize supply impedance and ground bounce during high-speed switching. This center-pin distribution lowers simultaneous switching noise by improving current return path symmetry and reducing loop inductance - critical for stable operation above 50 MHz.

Is the 74AC11175DWR pin-compatible with the 74AC175DWR?

No, the 74AC11175DWR is not pin-compatible with the 74AC175DWR. While both use 20-pin SOIC (DW) packages, their pinouts differ: 74AC11175DWR dedicates pins 9–12 to Q̅ outputs and pin 19 to individual CLR, whereas 74AC175DWR uses pins 9–12 for additional control signals and shares CLR across all stages - requiring PCB redesign for substitution.