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Texas Instruments 74AC11374NT
- Part No.:
- 74AC11374NT
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
74AC11374NT.pdf
- Description:
- BUS DRIVER, AC SERIES, 8-BIT,
- Quantity:
- Payment:
- Shipping:
Inventory:7,329
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Product details
Overview
74AC11374NT from Texas Instruments is an octal D-type edge-triggered flip-flop with 3-state outputs in a 24-pin plastic DIP (NT) package, operating from −40°C to 85°C at VCC = 3–5.5 V. It provides parallel data latching on the positive clock edge, independent output-enable control, and bus-driving capability with ±24 mA drive strength at 5 V. It is used in I/O port expansion and bidirectional bus interfacing in industrial control logic systems.
For engineers reviewing the 74AC11374NT datasheet, 74AC11374NT pinout, 74AC11374NT application, or 74AC11374NT equivalent, this page delivers verified functional behavior, timing constraints (95 MHz max clock at 5 V), 3-state switching specs (tPZL/tPHZ ≤ 9.4 ns), thermal limits (−40°C to 85°C), and direct package-confirmed mechanical data for NT-package layout integration.
Technical Context
This device implements eight independent D-type flip-flops sharing a common clock (CLK) and output-enable (OE) signal. Each flip-flop captures D-input state on the rising edge of CLK and holds it until the next active clock transition, while OE independently places all Q outputs into high-impedance without affecting internal latch state.
The 74AC11374NT uses TI's EPIC (Enhanced-Performance Implanted CMOS) 1-μm process, enabling 500-mA latch-up immunity at 125°C and flow-through pinout architecture that minimizes trace crossovers. Its center-pin VCC/GND configuration reduces high-speed switching noise in dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | Advanced CMOS (AC), compatible with TTL input thresholds and CMOS output swing |
| Operating Voltage | 3 V to 5.5 V - supports mixed-voltage system interfacing with defined VIH/VIL across range |
| Max Clock Frequency | 95 MHz at VCC = 5 V - enables high-speed register staging in synchronous digital subsystems |
| Output Drive | ±24 mA at VCC = 5 V - sufficient to drive 50-pF loads or standard TTL inputs without external buffers |
| Propagation Delay | tPLH/tPHL ≤ 10.2 ns at VCC = 5 V - ensures tight timing margin in 10-ns clock domains |
| 3-State Enable Time | tPZL ≤ 9.4 ns, tPHZ ≤ 11.2 ns at VCC = 5 V - allows rapid bus arbitration with minimal contention window |
| Temperature Range | −40°C to +85°C - qualified for industrial-grade embedded control and instrumentation applications |
Pinout & Package
74AC11374NT is housed in a 24-pin plastic dual in-line package (PDIP, NT package), with 0.3-inch body width and through-hole mounting. Pin 1 is marked by a notch or dot; VCC (pins 14, 20) and GND (pins 1, 2, 3, 4, 15, 16, 17, 18) are distributed centrally to reduce power-supply inductance and ground bounce.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 15–18 | GND | Eight dedicated ground terminals minimize shared-impedance noise between flip-flop sections |
| 14, 20 | VCC | Two supply pins placed symmetrically to balance decoupling and reduce IR drop across die |
| 5–8, 10–13 | Q1–Q8 | True 3-state outputs - high-Z when OE = H; no pull-ups required for bus termination |
| 9 | OE | Active-low output enable - asynchronous control; does not affect internal latch state or clock operation |
| 19, 21–24 | D1–D8 | Data inputs - sampled on rising CLK edge; no internal latching prior to clock event |
| 22 | CLK | Single global clock input - edge-triggered; requires monotonic rise/fall (≤5 ns/V for OE, ≤10 ns/V for data) |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Input (D) and output (Q) pins arranged on opposite sides - eliminates layer jumps and vias in PCB routing |
| Center-pin VCC/GND | Dual VCC (pins 14, 20) and eight GND pins (pins 1–4, 15–18) reduce simultaneous switching noise (SSN) |
| Independent OE control | OE disables outputs without resetting or altering stored data - enables non-disruptive bus sharing |
| EPIC process technology | 1-μm implanted CMOS delivers 500-mA latch-up immunity - suitable for noisy industrial environments |
| Bus-driver optimized outputs | 3-state outputs rated for ±24 mA sink/source - directly drives capacitive buses up to 50 pF without buffering |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Adapter |
|---|---|
|
Use Scenario: Adding parallel digital I/O capability to programmable logic controllers using 5-V backplane buses. IC Role / Device Role / Timing Role: Acts as an 8-bit output latch and input buffer, synchronizing field-device signals to the PLC scan cycle via CLK and isolating bus segments via OE. Use Value: Enables deterministic read/write timing with 95 MHz clock support and 3-state isolation prevents bus contention during hot-swap or diagnostics. |
Use Scenario: Bridging legacy TTL/CMOS peripherals (e.g., printers, modems) to modern microcontroller buses with voltage and timing compatibility. IC Role / Device Role / Timing Role: Serves as a level-translating, edge-triggered register that captures asynchronous peripheral data on CLK and presents it synchronously to the host MCU. Use Value: Eliminates need for discrete level shifters or glue logic; 3-state outputs allow shared bus access without external tri-state controllers. |
| Bidirectional Data Bus Transceiver | Buffer Register for Test Equipment |
|
Use Scenario: Implementing half-duplex bidirectional data transfer between two 8-bit subsystems sharing a single 8-wire bus. IC Role / Device Role / Timing Role: Functions as a direction-controlled register - OE enables transmit path (D→Q), while inverted OE enables receive path (Q→D via external feedback). Use Value: Provides clean bus turnaround with sub-10 ns 3-state disable/enable times, minimizing dead time and data corruption risk. |
Use Scenario: Capturing and holding test vectors or measurement results in automated test equipment (ATE) with precise timing alignment. IC Role / Device Role / Timing Role: Used as a static hold register - CLK strobes data from stimulus sources, and OE holds Q outputs stable during measurement acquisition windows. Use Value: Guarantees setup/hold margins (tsu = 2.5 ns, th = 3.5 ns at 5 V) for sub-10 ns timing-critical ATE synchronization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop with 3-state output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT11374N | ACT family: higher drive (±24 mA at 3 V), faster propagation (tPLH ≤ 7.5 ns @ 5 V), but higher ICC (80 μA vs. 8 μA typical) | Better suited for low-voltage, high-speed systems where AC speed is critical and power budget allows | Select 74ACT11374N only if ≥100 MHz operation at 3 V is required and board-level decoupling supports higher di/dt |
| SN74LVTH16374DGGR | 16-bit, LVTH family, 3.3-V only, 3-state, but different pinout (48-pin TSSOP) and no direct 24-pin DIP replacement | Targets modern 3.3-V systems with higher density; incompatible with NT-package footprint or 5-V operation | Choose SN74LVTH16374DGGR only for new 3.3-V designs requiring double-width registers and surface-mount assembly |
Compared with 74AC11374NT, the 74ACT11374N offers higher speed at lower voltages but increases static current and noise sensitivity, while the SN74LVTH16374DGGR provides double bit-width and 3.3-V optimization at the cost of package incompatibility and loss of 5-V tolerance - making 74AC11374NT uniquely suitable for legacy 5-V DIP-based industrial upgrades.
Availability
74AC11374NT is available at Aetrix Electronics and suitable for industrial control systems, legacy bus interface adapters, and test equipment requiring stable component supply with long-lifecycle support and full traceability.
Supply support for 74AC11374NT 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 solutions with broad industrial and automotive qualification.
The 74AC11374NT belongs to TI's AC logic family - designed for high-speed, low-power, TTL-compatible digital interfacing in industrial and instrumentation applications where robustness and pin-compatible upgrade paths matter.
FAQ
What is the maximum clock frequency supported by the 74AC11374NT?
The 74AC11374NT supports a maximum clock frequency of 95 MHz when operated at VCC = 5 V and TA = 25°C. At VCC = 3.3 V, the maximum clock frequency drops to 75 MHz. These values are specified under recommended operating conditions and assume proper signal integrity, including input transition rates ≤10 ns/V for data and ≤5 ns/V for OE.
Does the 74AC11374NT support 3.3-V operation?
Yes, the 74AC11374NT is fully specified for operation from VCC = 3 V to 5.5 V, including 3.3-V nominal systems. Input thresholds scale with VCC (VIH = 2.1 V min at 3 V), and output drive remains functional (±12 mA at 3 V), though timing performance degrades versus 5-V operation - e.g., max clock drops from 95 MHz to 75 MHz.
What is the function of the OE pin on the 74AC11374NT?
The OE (output enable) pin on the 74AC11374NT is an active-low control that places all eight Q outputs into high-impedance state when asserted (OE = HIGH). It operates asynchronously and does not affect internal flip-flop states - data remains latched and can be updated via CLK/D regardless of OE status, enabling seamless bus arbitration.
Is the 74AC11374NT pin-compatible with other 24-pin DIP octal flip-flops?
Yes, the 74AC11374NT shares the industry-standard 24-pin DIP (NT) pinout with functionally similar devices such as the 74AC574 and 74ACT374, including identical CLK, OE, Dn, Qn, VCC, and GND placements. However, internal logic (e.g., transparent latch vs. edge-triggered) differs - verify functional equivalence before substitution.
What package type does the 74AC11374NT use, and what are its key mechanical features?
The 74AC11374NT uses a 24-pin plastic dual in-line package (PDIP, NT), 0.3-inch wide, with through-hole leads. Key mechanical features include center-placed VCC (pins 14, 20) and eight dedicated GND pins (pins 1–4, 15–18) to minimize ground bounce, and a flow-through pin arrangement (D on left, Q on right) that simplifies PCB routing without layer transitions.
74AC11374NT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74AC11374NT FAQ
1.How can I place an order for 74AC11374NT through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC11374NT 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 74AC11374NT reliable?
The price and inventory of 74AC11374NT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC11374NT is usually 5 days.
3.What payment methods are accepted for 74AC11374NT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC11374NT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC11374NT?
74AC11374NT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC11374NT 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 74AC11374NT?
For technical support, including 74AC11374NT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC11374NT requirements.
6.How does Aetrix verify that 74AC11374NT is sourced from the original manufacturer or authorized distributors?
All 74AC11374NT 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 74AC11374NT meets industry standards.
7.What is the process for return or replacement of 74AC11374NT?
All 74AC11374NT units undergo pre-shipment inspection (PSI). If there is an issue with 74AC11374NT, 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 74AC11374NT part is unused and in its original packaging.
Return procedure for 74AC11374NT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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