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Home > Products > Integrated Circuits (ICs) > Logic > Flip Flops

Texas Instruments 74ACT11074NSR

Name: 74ACT11074NSR
Brand: Texas Instruments
SKU: 74ACT11074NSR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ACT11074NSR

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: 14-SOIC (0.209", 5.30mm Width)

Datasheet:: 74ACT11074NSR.pdf

Description:: IC FF D-TYPE DUAL 1BIT 14SO

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Product details

Overview

74ACT11074NSR from Texas Instruments is a dual positive-edge-triggered D-type flip-flop with independent asynchronous preset and clear inputs, designed for synchronous logic control in digital systems. It operates over –40°C to 85°C, supports 4.5 V to 5.5 V supply, delivers 100 MHz maximum clock frequency, exhibits 1.5 ns minimum propagation delay (t_PLH/t_PHL), and features TTL-voltage-compatible inputs for mixed-logic interfacing.

For engineers reviewing the 74ACT11074NSR datasheet, 74ACT11074NSR pinout, 74ACT11074NSR application, or 74ACT11074NSR equivalent, this device is selected for high-speed edge-triggered state storage where deterministic setup/hold timing (4.5 ns t_su, 0 ns t_h), rail-to-rail output swing, and latch-up immunity (500 mA at 125°C) are critical in industrial control and test equipment designs.

Technical Context

The 74ACT11074NSR implements two independent D-type latches triggered on the low-to-high transition of CLK, with asynchronous PRE and CLR inputs overriding clocked behavior. Its EPIC (Enhanced-Performance Implanted CMOS) 1-µm process enables fast switching while maintaining TTL input compatibility and robust noise immunity via center-pin V_CC/GND layout.

Functionally, it adheres to standard D-flip-flop behavior per the documented function table: PRE = L forces Q = H regardless of CLK/D; CLR = L forces Q = L; when both are high, data at D transfers to Q on CLK↑ provided t_su ≥ 4.5 ns and t_h ≥ 0 ns. Output drive capability is ±24 mA at V_CC = 5.5 V, supporting direct fan-out to multiple TTL loads.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and CMOS logic rails without level-shifting.
Max Clock Frequency	100 MHz - Supports high-speed synchronous state machines in communication interface and data acquisition timing paths.
Propagation Delay	1.5 ns (min), 9.6 ns (max) - Enables precise edge-aligned sampling in sub-10 ns timing windows.
Setup Time	4.5 ns - Defines minimum data stability window before CLK↑ required for reliable state capture.
Output Drive	±24 mA - Sufficient to directly drive up to 10 standard TTL inputs or terminate transmission lines.
Operating Temperature	–40°C to +85°C - Qualified for use in industrial environments without derating or thermal management.
Input Compatibility	TTL-voltage - Accepts standard 0.8 V / 2.0 V logic thresholds, simplifying integration with legacy 74LS/74F families.

Pinout & Package

SOP (NS) package, 14-pin, 1.27 mm pitch, 8.1 mm × 10.4 mm body size, 1.75 mm max height, tape-and-reel packaging (2000 units/reel), RoHS-compliant NiPdAu lead finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1PRE, 2PRE	Asynchronous preset input	Active-low signal forcing corresponding Q output high, independent of clock or data.
1CLR, 2CLR	Asynchronous clear input	Active-low signal forcing corresponding Q output low, overriding all other inputs.
1CLK, 2CLK	Clock input	Positive-edge-sensitive trigger controlling synchronous transfer of D to Q.
1D, 2D	Data input	Holds value sampled on CLK↑ rising edge; must meet 4.5 ns setup time relative to CLK.
1Q, 2Q	True output	Complements internal flip-flop state; drives loads up to ±24 mA at V_CC = 5.5 V.
1Q̅, 2Q̅	Inverted output	Logic complement of Q; provides simultaneous true/inverted outputs for bus control or differential signaling.
V_CC	Power supply	Center-pin placement minimizes high-speed switching noise coupling into adjacent signals.
GND	Ground reference	Center-pin placement ensures low-inductance return path and improves signal integrity at >100 MHz operation.

Key Features

Feature	Design Value
EPIC 1-µm CMOS process	Delivers high speed (100 MHz) with low power consumption (ICC typ. 4 µA at 25°C) and 500-mA latch-up immunity.
Center-pin V_CC/GND	Reduces simultaneous switching noise by minimizing ground bounce and supply rail collapse during high-frequency toggling.
TTL-compatible inputs	Eliminates need for external level shifters when interfacing with 74LS, 74F, or microcontroller GPIOs operating at 5 V.
Dual independent flip-flops	Enables compact implementation of paired register functions-e.g., data/address latching or dual-channel synchronization-within one 14-pin SOP.
Asynchronous preset/clear	Allows immediate initialization or reset of state without waiting for next clock edge, critical for system startup and fault recovery.

Applications

Industrial PLC I/O Expansion	Test Equipment Pattern Generation
Use Scenario: Latching parallel sensor inputs or actuator commands in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Dual D-flip-flop providing synchronized registration of 8-bit status/control words with independent reset per channel. Use Value: Asynchronous CLR/PRE enables deterministic initialization at power-on or fault condition, while 100 MHz clock tolerance supports high-throughput scan cycles.	Use Scenario: Generating precise, repeatable stimulus waveforms in automated test equipment (ATE) pattern generators. IC Role / Device Role / Timing Role: Edge-triggered storage element capturing test vector data on system clock edges with sub-10 ns timing resolution. Use Value: 1.5 ns min propagation delay and 4.5 ns setup time ensure tight skew control across multi-bit stimulus buses, reducing pattern jitter.
Digital Communication Interface Sync	Legacy System Bus Glue Logic
Use Scenario: Synchronizing asynchronous UART or SPI handshake signals between domains with different clock domains. IC Role / Device Role / Timing Role: Dual-stage synchronizer using cascaded PRE/CLR-controlled flip-flops to eliminate metastability in control line transfers. Use Value: Independent asynchronous controls allow forced alignment to known states before enabling clocked transfer, improving reliability in cross-clock-domain handshaking.	Use Scenario: Interfacing modern microcontrollers to legacy 8-bit parallel buses (e.g., ISA, Z80, or 6502 peripherals). IC Role / Device Role / Timing Role: Registering address/data strobes and generating chip-select timing with precise edge alignment. Use Value: TTL-compatible inputs accept legacy bus voltage levels directly; dual flip-flops support concurrent address latching and control signal generation in minimal board area.

Industrial PLC I/O Expansion

Test Equipment Pattern Generation

Use Scenario: Latching parallel sensor inputs or actuator commands in programmable logic controller backplanes.

IC Role / Device Role / Timing Role: Dual D-flip-flop providing synchronized registration of 8-bit status/control words with independent reset per channel.

Use Value: Asynchronous CLR/PRE enables deterministic initialization at power-on or fault condition, while 100 MHz clock tolerance supports high-throughput scan cycles.

Use Scenario: Generating precise, repeatable stimulus waveforms in automated test equipment (ATE) pattern generators.

IC Role / Device Role / Timing Role: Edge-triggered storage element capturing test vector data on system clock edges with sub-10 ns timing resolution.

Use Value: 1.5 ns min propagation delay and 4.5 ns setup time ensure tight skew control across multi-bit stimulus buses, reducing pattern jitter.

Digital Communication Interface Sync

Legacy System Bus Glue Logic

Use Scenario: Synchronizing asynchronous UART or SPI handshake signals between domains with different clock domains.

IC Role / Device Role / Timing Role: Dual-stage synchronizer using cascaded PRE/CLR-controlled flip-flops to eliminate metastability in control line transfers.

Use Value: Independent asynchronous controls allow forced alignment to known states before enabling clocked transfer, improving reliability in cross-clock-domain handshaking.

Use Scenario: Interfacing modern microcontrollers to legacy 8-bit parallel buses (e.g., ISA, Z80, or 6502 peripherals).

IC Role / Device Role / Timing Role: Registering address/data strobes and generating chip-select timing with precise edge alignment.

Use Value: TTL-compatible inputs accept legacy bus voltage levels directly; dual flip-flops support concurrent address latching and control signal generation in minimal board area.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ACT74DR	Same ACT family, identical electrical specs, but includes complementary Q/Q̅ outputs per stage and uses SOIC-14 (D) package instead of SOP-14 (NS).	No functional difference in logic behavior; differs only in package footprint and reel packaging format.	Select SN74ACT74DR if SOIC-14 board layout or tube packaging is preferred; otherwise, 74ACT11074NSR offers identical performance in SOP-14 tape-and-reel form.
74LCX74M	Lower-voltage (2.0–3.6 V) CMOS variant with 3.3 V compatibility; higher max f_CLK (150 MHz), but not TTL-input compatible and lacks 5 V operation.	Requires level translation for 5 V systems; unsuitable for direct replacement where V_CC = 5 V or TTL interfacing is mandatory.	Choose 74LCX74M only in new 3.3 V designs requiring higher speed; avoid in existing 5 V or mixed-voltage systems where 74ACT11074NSR's TTL compatibility is essential.

Compared with SN74ACT74DR and 74LCX74M, the 74ACT11074NSR uniquely combines 5 V operation, TTL input compatibility, and SOP-14 tape-and-reel packaging-making it optimal for industrial upgrades requiring drop-in replacement in space-constrained, high-noise environments without redesigning power or interface circuitry.

Availability

74ACT11074NSR is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, and legacy system retrofits requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 74ACT11074NSR 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 decades of experience in high-reliability industrial and automotive-grade components.

The 74ACT11074NSR belongs to TI's advanced CMOS (ACT) logic family, engineered for high-speed, low-noise 5 V digital systems where TTL compatibility, latch-up immunity, and precise edge-triggered timing are essential.

FAQ

What is the maximum clock frequency supported by the 74ACT11074NSR?

The 74ACT11074NSR supports a maximum clock frequency of 100 MHz under recommended operating conditions (V_CC = 4.5 V to 5.5 V, T_A = –40°C to 85°C). This rating is verified across temperature and voltage extremes, with typical operation reaching 125 MHz at 25°C. The 74ACT11074NSR achieves this performance using TI's EPIC 1-µm CMOS process and optimized internal gate design, making it suitable for high-speed digital control and test equipment applications.

Does the 74ACT11074NSR support 3.3 V operation?

No, the 74ACT11074NSR is specified only for 4.5 V to 5.5 V supply operation and is not rated for reliable 3.3 V use. Its input thresholds (V_IL = 0.8 V, V_IH = 2.0 V) and output drive characteristics are optimized for 5 V TTL/CMOS systems. Attempting to operate the 74ACT11074NSR at 3.3 V may result in marginal noise margins, reduced output swing, or functional failure. For 3.3 V designs, consider TI's 74LCX74 or 74LVC74 families instead.

What is the purpose of the center-pin V_CC and GND configuration in the 74ACT11074NSR package?

Center-pin V_CC and GND placement in the 74ACT11074NSR's SOP-14 (NS) package minimizes high-speed switching noise by reducing power/ground loop inductance and improving decoupling efficiency. This layout lowers simultaneous switching output (SSO) noise, suppresses ground bounce, and enhances signal integrity during fast transitions-especially critical at 100 MHz operation. The 74ACT11074NSR leverages this mechanical optimization to maintain timing accuracy and reduce EMI in dense PCB layouts.

Can the 74ACT11074NSR be used as a direct replacement for the 74LS74 in existing designs?

Yes, the 74ACT11074NSR can replace the 74LS74 in most 5 V systems due to identical pinout, same dual D-flip-flop functionality with PRE/CLR, and TTL-compatible inputs. However, the 74ACT11074NSR offers significantly faster propagation (1.5–9.6 ns vs. 15–40 ns), lower power (µA vs. mA ICC), and higher output drive (±24 mA vs. ±8 mA). Designers should verify that the increased speed does not induce timing violations in legacy layouts and confirm that the 74ACT11074NSR's higher drive strength doesn't overload downstream loads.

What does "EPIC" mean in the context of the 74ACT11074NSR process technology?

EPIC stands for Enhanced-Performance Implanted CMOS-a proprietary Texas Instruments fabrication process used for the 74ACT11074NSR. It employs ion implantation to precisely control transistor threshold voltages and doping profiles, resulting in higher speed, improved noise immunity, and 500-mA latch-up immunity at 125°C. Unlike standard CMOS, EPIC enables the 74ACT11074NSR to combine TTL-level input compatibility with full 5 V CMOS output swing and robust operation in electrically noisy industrial environments.

74ACT11074NSR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ACT

Package/Case:: 14-SOIC (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Set(Preset) and Reset

Type:: D-Type

Output Type:: Complementary

Number of Elements:: 2

Number of Bits per Element:: 1

Clock Frequency:: 125 MHz

Max Propagation Delay @ V, Max CL:: 8.5ns @ 5V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Iq):: 4 µA

Input Capacitance:: 3.5 pF

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SO

74ACT11074NSR FAQ

1.How can I place an order for 74ACT11074NSR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ACT11074NSR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74ACT11074NSR reliable?

The price and inventory of 74ACT11074NSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11074NSR is usually 5 days.

3.What payment methods are accepted for 74ACT11074NSR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11074NSR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74ACT11074NSR?

74ACT11074NSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ACT11074NSR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74ACT11074NSR?

For technical support, including 74ACT11074NSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11074NSR requirements.

6.How does Aetrix verify that 74ACT11074NSR is sourced from the original manufacturer or authorized distributors?

All 74ACT11074NSR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74ACT11074NSR meets industry standards.

7.What is the process for return or replacement of 74ACT11074NSR?

All 74ACT11074NSR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11074NSR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74ACT11074NSR part is unused and in its original packaging.

Return procedure for 74ACT11074NSR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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