Texas Instruments 74AC11175DW

Overview

74AC11175DW from Rochester Electronics is a quadruple positive-edge-triggered D-type flip-flop with asynchronous clear, operating from -40°C to 85°C, featuring 3.3 V typical supply voltage, 8 ns max propagation delay (t_PLH/t_PHL), and ±24 mA output drive capability. It serves as a synchronous data latch in digital control logic, bus interface timing, and state register stages.

For engineers reviewing the 74AC11175DW datasheet, 74AC11175DW pinout, 74AC11175DW application, or 74AC11175DW equivalent, key selection criteria include guaranteed AC/DC parametric compliance to original OCM specs, military-grade temperature range validation, direct-clear functionality for reset-critical systems, and compatibility with 3.3 V CMOS logic families.

Technical Context

This device implements four independent D-type latches, each with dedicated clock (CLK) and clear (CLR) inputs, where data at the D input is sampled only on the rising edge of CLK and asynchronously reset when CLR is low. All outputs (Q) are non-inverted and actively driven.

It belongs to the Advanced CMOS (AC) logic family, ensuring TTL-compatible input thresholds, rail-to-rail output swing, and noise immunity up to 30% V_CC. The design supports fan-out of 10 LSTTL loads per output and operates with static power dissipation below 10 µA at 25°C.

Key Specifications

Pinout & Package

74AC11175DW is supplied in a 20-pin SOIC (Small Outline Integrated Circuit) package with 0.300-inch body width and standard JEDEC MS-013 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AC175N and 74LVC175PW, the 74AC11175DW uniquely provides individual asynchronous clear per flip-flop, full -40°C to +85°C qualification, and SOIC packaging optimized for automated SMT production - making it the only option supporting selective reset and industrial thermal reliability in one device.

Availability

74AC11175DW is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device manufacturing requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 74AC11175DW 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

Rochester Electronics is a licensed manufacturer and distributor of legacy semiconductors, authorized by original component manufacturers to produce and test devices using original die or recreated IP.

The 74AC11175DW belongs to Rochester's manufactured logic portfolio, designed to replicate obsolete or end-of-life AC-series flip-flops with full compliance to original military and industrial specifications.

FAQ

What is the maximum clock frequency supported by the 74AC11175DW?

The 74AC11175DW does not specify a maximum clock frequency in its datasheet; instead, timing is defined by setup/hold times and propagation delays. With 8 ns max t_PLH/t_PHL and 4.5 ns min t_W (clock pulse width), the device supports reliable operation up to approximately 100 MHz in well-designed PCB layouts. System-level timing margins must account for board trace skew and signal integrity - the 74AC11175DW itself meets these constraints under standard AC loading conditions.

Does the 74AC11175DW support mixed-voltage interfacing?

Yes, the 74AC11175DW supports mixed-voltage interfacing due to its wide 2.0 V to 6.0 V supply range and TTL-compatible input thresholds. When powered at 3.3 V, it accepts 0–0.9 V as logic low and 2.1–3.3 V as logic high, enabling direct connection to both 3.3 V microcontrollers and 5 V legacy peripherals. Its outputs swing rail-to-rail, ensuring compatible voltage levels for downstream receivers - a key advantage of the 74AC11175DW in heterogeneous logic systems.

Is the 74AC11175DW pin-compatible with the original Texas Instruments 74AC11175?

Yes, the 74AC11175DW is manufactured by Rochester Electronics to original OCM specifications and maintains identical pinout, electrical behavior, and timing parameters as the legacy TI 74AC11175 in the 20-pin SOIC package. All 20 pins - including individual D, CLK, CLR, and Q assignments - match exactly. The 74AC11175DW is intended as a direct replacement with no PCB or firmware changes required for systems originally designed for the TI part.

What is the purpose of the separate clear input on each flip-flop in the 74AC11175DW?

The separate active-low clear (CLR) input on each of the four flip-flops in the 74AC11175DW enables independent reset of individual registers without disturbing the state of others. This is essential in applications like programmable logic controllers or digital sequencers where partial state initialization is required. Unlike shared-clear alternatives, the 74AC11175DW's per-flip-flop CLR architecture eliminates need for additional gating logic - a defining functional feature of the 74AC11175DW.

How is the 74AC11175DW qualified for industrial temperature operation?

The 74AC11175DW is characterized and tested over -40°C to +85°C per original OCM specifications, with parametric validation at temperature extremes using factory-traceable test programs. Rochester Electronics applies MIL-PRF-35835 Class Q qualification and AS9120-certified processes to ensure conformance. Every 74AC11175DW lot undergoes temperature cycling and functional screening - confirming that the 74AC11175DW delivers guaranteed performance across its full rated industrial range.