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Texas Instruments 74AC11074DR
- Part No.:
- 74AC11074DR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74AC11074DR.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,868
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Product details
Overview
74AC11074DR 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 features independent preset (PRE) and clear (CLR) inputs per flip-flop, asynchronous control, and EPIC™ CMOS process for latch-up immunity up to 500 mA at 125°C - used in digital logic synchronization and state-holding circuits.
For engineers reviewing the 74AC11074DR datasheet, 74AC11074DR pinout, 74AC11074DR application, or 74AC11074DR equivalent, this page delivers verified functional identity, validated timing parameters (tsu = 3.5 ns, tPLH = 5.4 ns @ 5 V), package dimensions (SOIC-D, 8.75 × 3.91 mm), and real-world substitution guidance for legacy TTL/CMOS logic upgrades.
Technical Context
The 74AC11074DR implements two fully independent D-type flip-flops with asynchronous active-low PRE and CLR inputs, enabling immediate set/reset regardless of clock state. Each flip-flop samples data on the low-to-high transition of CLK, with setup time (tsu) as low as 3.5 ns and hold time (th) of 0 ns at VCC = 5 V.
Its EPIC™ 1-µm CMOS process ensures rail-to-rail output swing, input voltage tolerance from −0.5 V to VCC + 0.5 V, and robust noise immunity via center-pin VCC/GND configuration - critical for high-speed digital systems where switching noise must be minimized across shared power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | Advanced CMOS (AC), compatible with TTL input thresholds and CMOS output levels |
| Max Clock Frequency | 125 MHz @ VCC = 5 V - supports high-speed synchronous logic in control sequencers and counters |
| Propagation Delay | tPLH/tPHL = 5.4 / 5.0 ns @ VCC = 5 V - enables tight timing margins in pipeline stages |
| Output Drive | ±24 mA @ VCC = 5 V - directly drives multiple 74AC/ACT loads without buffering |
| Supply Range | 3 V to 5.5 V - allows operation from 3.3-V or 5-V rails with guaranteed AC performance |
| Operating Temp | −40°C to +85°C - qualified for industrial-grade embedded control and instrumentation |
| Input Clamp Current | ±20 mA - protects against transient overvoltage during hot-swap or ESD events |
Pinout & Package
74AC11074DR is packaged in a 14-pin plastic small-outline integrated circuit (SOIC-D), 8.75 mm × 3.91 mm body size, 1.75 mm max height, with standard 1.27-mm pitch and pin 1 index area marked on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1PRE | Active-low asynchronous preset for first flip-flop; forces Q = H, Q̅ = L when asserted |
| 2 | 1Q | True output of first flip-flop; tracks D input after CLK↑ if PRE/CLR inactive |
| 3 | 1Q̅ | Inverted output of first flip-flop; complementary to 1Q |
| 4 | GND | Ground reference for both flip-flops and internal logic; center-pin placement reduces ground bounce |
| 5 | 2Q | True output of second flip-flop |
| 6 | 2Q̅ | Inverted output of second flip-flop |
| 7 | 2PRE | Active-low asynchronous preset for second flip-flop |
| 8 | 1CLK | Clock input for first flip-flop; edge-triggered on low-to-high transition |
| 9 | 1D | Data input for first flip-flop; sampled at CLK↑ if PRE/CLR high |
| 10 | 1CLR | Active-low asynchronous clear for first flip-flop; forces Q = L, Q̅ = H when asserted |
| 11 | VCC | Positive supply; center-pin placement minimizes supply noise coupling between sections |
| 12 | 2CLR | Active-low asynchronous clear for second flip-flop |
| 13 | 2D | Data input for second flip-flop |
| 14 | 2CLK | Clock input for second flip-flop |
Key Features
| Feature | Design Value |
|---|---|
| Center-pin VCC/GND | Reduces simultaneous switching noise by separating supply/ground paths between flip-flop sections |
| Asynchronous PRE/CLR | Enables immediate state initialization or reset independent of clock timing - essential for power-on sequencing |
| 500-mA latch-up immunity | Guarantees robust operation under transient stress at 125°C, meeting industrial reliability requirements |
| EPIC™ 1-µm CMOS process | Delivers higher speed and lower static current vs. older 74HC/74LS families while maintaining pin compatibility |
| Wide supply range (3–5.5 V) | Supports mixed-voltage system integration without level-shifting in 3.3-V/5-V interface domains |
Applications
| Industrial PLC I/O Modules | Digital Test Equipment |
|---|---|
Use Scenario: Capturing sensor status changes in real-time within programmable logic controller backplanes. IC Role / Device Role / Timing Role: Synchronizing asynchronous field signals to the system clock domain using dual-edge-controlled sampling. Use Value: Prevents metastability in control logic with 3.5-ns setup time and zero hold time, ensuring deterministic state capture at 125 MHz. | Use Scenario: Generating precise stimulus patterns and capturing response waveforms in automated test fixtures. IC Role / Device Role / Timing Role: Acting as a dual-channel data register to align parallel test vectors with system timing clocks. Use Value: ±24-mA drive strength directly interfaces with 50-Ω transmission lines and TTL/CMOS test loads without external buffers. |
| Communication Protocol Bridges | Legacy System Upgrades |
Use Scenario: Buffering and retiming UART or SPI control signals between mismatched clock domains in protocol translation gateways. IC Role / Device Role / Timing Role: Providing isolated, glitch-free signal staging between host and peripheral interfaces. Use Value: Independent PRE/CLR per channel enables selective reset of one communication lane without disrupting the other. | Use Scenario: Replacing obsolete 74LS74 or 74F74 logic in aging instrumentation and avionics subsystems. IC Role / Device Role / Timing Role: Drop-in functional replacement with identical pinout and improved AC performance. Use Value: 125-MHz max frequency and 5.4-ns propagation delay exceed LS/F-series specs while maintaining full DC compatibility. |
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 |
|---|---|---|---|
| SN74AC74DR | Same AC family, identical pinout and function; differs only in part numbering convention (TI's standardized 74AC74 vs legacy 74AC11074) | No functional difference; SN74AC74DR is TI's current catalog designation for the same silicon | Select SN74AC74DR for new designs requiring TI's actively supported part number and latest packaging/traceability |
| 74HC74D | Slower max clock (≤ 60 MHz @ 5 V), higher propagation delay (≈ 15 ns), lower drive (±4 mA), but wider VCC range (2–6 V) | Suitable for cost-sensitive, low-speed applications where AC speed and drive are not required | Choose 74HC74D only when budget constraints outweigh timing and drive requirements - not a performance-equivalent substitute |
Compared with 74AC11074DR, SN74AC74DR offers identical electrical behavior and is TI's modernized part number with ongoing production support, whereas 74HC74D trades speed and drive for broader voltage flexibility and lower cost - making it suitable only for non-critical, low-frequency logic functions.
Availability
74AC11074DR is available at Aetrix Electronics and suitable for industrial automation, test equipment, and legacy system maintenance requiring stable component supply, long-term obsolescence management, and traceable sourcing.
Supply support for 74AC11074DR 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 logic families.
The 74AC11074DR belongs to TI's Advanced CMOS (74AC) logic product line, designed for high-speed, low-noise digital interfacing in industrial, communications, and computing systems where TTL compatibility and CMOS efficiency are both required.
FAQ
What is the maximum clock frequency supported by the 74AC11074DR?
The 74AC11074DR supports a maximum clock frequency of 125 MHz when operated at VCC = 5 V and TA = 25°C, as specified in the switching characteristics table. This rating decreases slightly across temperature and voltage extremes - e.g., 100 MHz at VCC = 3.3 V - but remains sufficient for most high-speed synchronous logic applications including state machines and data latching in industrial controllers.
Does the 74AC11074DR have the same pinout as the 74LS74 or 74HC74?
Yes, the 74AC11074DR uses the industry-standard 14-pin SOIC-D pinout shared with 74LS74, 74HC74, and SN74AC74. Pin assignments for PRE, CLR, CLK, D, Q, and Q̅ are identical across all these devices, enabling direct PCB-level replacement in existing designs without layout modification - provided voltage and timing requirements are verified.
What does "EPIC™ process" mean for the 74AC11074DR?
EPIC™ (Enhanced-Performance Implanted CMOS) is Texas Instruments' proprietary 1-µm CMOS fabrication process used for the 74AC11074DR. It delivers superior speed, noise immunity, and latch-up resistance (500 mA typical at 125°C) compared to earlier CMOS generations, while maintaining compatibility with TTL input thresholds and offering rail-to-rail output swing - critical for reliable operation in noisy industrial environments.
Can the 74AC11074DR operate from a 3.3-V supply?
Yes, the 74AC11074DR is fully characterized for operation from 3 V to 5.5 V, including 3.3-V nominal supplies. At VCC = 3.3 V, it delivers 100-MHz max clock frequency, 5.8-ns typical tPLH, and ±12-mA output drive - making it suitable for mixed-voltage systems where 3.3-V logic interfaces with 5-V peripherals or legacy components.
Is the 74AC11074DR RoHS compliant and lead-free?
Yes, the 74AC11074DR is RoHS compliant and features NiPdAu (NIPDAU) lead finish, as confirmed in TI's Package Option Addendum. It carries a JEDEC MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH) and is qualified for lead-free reflow soldering up to 260°C peak temperature - meeting modern environmental and manufacturing standards for industrial and commercial electronics.
74AC11074DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 7.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 3V ~ 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-SOIC
74AC11074DR FAQ
1.How can I place an order for 74AC11074DR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC11074DR 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 74AC11074DR reliable?
The price and inventory of 74AC11074DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC11074DR is usually 5 days.
3.What payment methods are accepted for 74AC11074DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC11074DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC11074DR?
74AC11074DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC11074DR 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 74AC11074DR?
For technical support, including 74AC11074DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC11074DR requirements.
6.How does Aetrix verify that 74AC11074DR is sourced from the original manufacturer or authorized distributors?
All 74AC11074DR 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 74AC11074DR meets industry standards.
7.What is the process for return or replacement of 74AC11074DR?
All 74AC11074DR units undergo pre-shipment inspection (PSI). If there is an issue with 74AC11074DR, 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 74AC11074DR part is unused and in its original packaging.
Return procedure for 74AC11074DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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