Texas Instruments SN74F174ANSR

Overview

SN74F174ANSR from Texas Instruments is a hex D-type positive-edge-triggered flip-flop with asynchronous clear, implemented in F-series TTL logic. It contains six independent D-flip-flops sharing one common clock and one direct-clear input, operates at 5 V supply, supports 80 MHz max clock frequency at full temperature range (0°C to 70°C), and delivers ±20 mA output drive capability. It is used in synchronous digital systems for data latching, shift register stages, and pattern generation.

For engineers reviewing the SN74F174ANSR datasheet, SN74F174ANSR pinout, SN74F174ANSR application, or SN74F174ANSR equivalent, key selection criteria include TTL-compatible input thresholds (V_IL = 0.8 V, V_IH = 2.0 V), guaranteed 5 ns setup/hold timing margins, SOIC-16 package footprint, and compatibility with legacy 74F logic families in industrial control and test equipment designs.

Technical Context

The SN74F174ANSR implements six identical edge-triggered storage elements with fully buffered clock and clear inputs, ensuring noise immunity and consistent propagation delay across all channels. Each flip-flop transfers D-input data to Q-output on the rising edge of CLK while CLR asynchronously forces Q low regardless of clock state.

Its TTL-based design features standard 5-V operation, bipolar transistor implementation, and guaranteed performance over 0°C to 70°C with 4.5–5.5 V supply tolerance. Timing is specified with 50 pF load and 500 Ω termination, supporting reliable interconnect in multi-stage synchronous logic chains.

Key Specifications

Pinout & Package

SN74F174ANSR is supplied in a 16-pin plastic dual in-line package (PDIP), 300-mil width, with standard through-hole mounting and 0.1-inch pin pitch. Pin 1 is located at the top-left corner when notch or dot is oriented upward.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74F174ADR and SN74LS174N, the SN74F174ANSR offers the highest clock speed among PDIP-packaged hex D-flip-flops while maintaining direct pin compatibility with legacy 74F designs-making it optimal for upgrades and repairs of existing through-hole systems requiring >50 MHz operation.

Availability

SN74F174ANSR is available at Aetrix Electronics and suitable for industrial control registers, test equipment pattern generators, and legacy system data buffers requiring stable component supply and long-term obsolescence support.

Supply support for SN74F174ANSR 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 company founded in 1930, specializing in analog, embedded processing, and logic ICs with broad industrial, automotive, and consumer applications.

The SN74F174ANSR belongs to TI's 74F TTL logic family, designed specifically for high-speed, noise-immune digital control in commercial-grade systems where reliability and timing predictability are critical.

FAQ

What is the maximum operating clock frequency of the SN74F174ANSR?

The SN74F174ANSR supports a maximum clock frequency of 80 MHz across its full operating temperature range (0°C to 70°C). This rating is verified under recommended conditions: V_CC = 4.5 V to 5.5 V, C_L = 50 pF, and R_L = 500 Ω. At 25°C and 5 V, the device achieves up to 100 MHz, but system-level timing margins should be based on the 80 MHz worst-case spec for robust design.

Does the SN74F174ANSR have separate clock enable or preset functionality?

No, the SN74F174ANSR does not include clock enable or preset inputs. It provides only a shared positive-edge-triggered clock (CLK) and a single active-low asynchronous clear (CLR) input that resets all six Q outputs to logic low. Data is latched only on CLK rising edges, and no additional control signals are present on the SN74F174ANSR pinout.

Is the SN74F174ANSR RoHS compliant?

Yes, the SN74F174ANSR is RoHS compliant, with lead finish specified as NiPdAu (nickel-palladium-gold) per TI's official packaging documentation. The part meets EU Directive 2011/65/EU requirements and carries no exemptions. Compliance applies to both material composition and manufacturing process for units shipped after 2006.

Can the SN74F174ANSR drive standard TTL loads directly?

Yes, the SN74F174ANSR can drive standard TTL loads directly: each output sources –1 mA (high) and sinks 20 mA (low), meeting or exceeding the input current requirements of 74F, 74LS, and 74S logic families. Its VOL ≤ 0.5 V at I_OL = 20 mA ensures solid logic-low recognition even under full fanout conditions.

What is the pin 1 marking orientation for SN74F174ANSR in PDIP package?

On the SN74F174ANSR PDIP package, pin 1 is identified by a small circular indentation or molded dot located at the top-left corner of the package body when the text marking is upright and the notch (if present) faces upward. This matches standard JEDEC MO-016AA mechanical specifications for 16-pin DIP devices.