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Texas Instruments 74ACT11374NT
- Part No.:
- 74ACT11374NT
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
74ACT11374NT.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,509
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Product details
Overview
74ACT11374NT from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs in a 24-pin plastic DIP (NT) package. It operates from –40°C to 85°C at 4.5–5.5 V, delivers ±24 mA output drive, supports 55 MHz clock frequency, and features TTL-compatible inputs for bus interface applications including I/O ports and bidirectional data buffers.
For engineers reviewing the 74ACT11374NT datasheet, 74ACT11374NT pinout, 74ACT11374NT application, or 74ACT11374NT equivalent, key selection considerations include its 3-state bus-driving capability, flow-through PCB layout optimization, center-pin VCC/GND noise reduction, EPIC CMOS process, and 500-mA latch-up immunity at 125°C.
Technical Context
This device implements eight independent positive-edge-triggered D flip-flops with synchronous parallel loading and asynchronous 3-state control via OE. Each flip-flop captures D-input logic on CLK↑ and holds state until next clock edge, while OE independently places all Q outputs in high-impedance without affecting internal register operation.
The architecture uses Texas Instruments' EPIC 1-μm CMOS process, enabling TTL-voltage compatibility (VIH = 2 V, VIL = 0.8 V), low input capacitance (Ci = 4 pF), and fast switching (tPLH/tPHL ≤ 12.4 ns at 5.5 V). Center-placed VCC and GND pins minimize simultaneous switching noise in high-density layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ACT (Advanced CMOS TTL-compatible) - ensures interoperability with legacy TTL systems without level-shifting. |
| Supply Voltage | 4.5 V to 5.5 V - supports standard 5-V digital rails with ±10% tolerance for robust industrial operation. |
| Max Clock Frequency | 55 MHz - enables high-speed data latching in bus arbitration and synchronous I/O timing paths. |
| Output Drive | ±24 mA - sufficient to drive 50-pF loads directly, eliminating need for external buffers in medium-capacitance buses. |
| Propagation Delay | tPLH/tPHL ≤ 12.4 ns - guarantees sub-13 ns path timing for critical setup/hold windows in 55-MHz systems. |
| 3-State Enable Delay | tPZH/tPLZ ≤ 13.2 ns - ensures rapid bus release/activation for time-multiplexed shared-data lines. |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial environments without derating. |
Pinout & Package
74ACT11374NT is housed in a 24-pin plastic dual in-line package (PDIP, NT), with center-aligned VCC (pins 14, 15) and GND (pins 7, 8, 16, 17) to suppress ground bounce and supply noise during high-speed switching.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1D–8D (pins 1–4, 20–23) | Data inputs | Asynchronous parallel load inputs; each maps to corresponding Q output on CLK↑. |
| CLK (pin 13) | Clock input | Positive-edge-sensitive global clock; triggers simultaneous capture across all eight flip-flops. |
| OE (pin 12) | Output enable | Active-low control: drives all Q outputs to high-impedance when high; no effect on internal register state. |
| 1Q–8Q (pins 5–8, 18–21) | True buffered outputs | 3-state outputs with rail-to-rail swing; support hot-swappable bus connection without contention. |
| VCC (pins 14, 15) | Power supply | Dual center-supply pins reduce IR drop and improve transient current delivery during switching. |
| GND (pins 7, 8, 16, 17) | Ground reference | Four dedicated ground pins lower impedance return path and suppress simultaneous switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Input-to-output signal path runs left-to-right across package, minimizing trace crossovers and layer count in PCB routing. |
| TTL-compatible inputs | VIH = 2 V / VIL = 0.8 V thresholds allow direct interfacing with 74LS, 74F, and microcontroller GPIOs without pull-ups or translators. |
| High latch-up immunity | 500 mA at 125°C - exceeds JEDEC JESD78 Class II requirements, ensuring reliability in noisy or thermally stressed systems. |
| EPIC CMOS process | 1-μm implanted CMOS delivers low power-delay product (Cpd = 96–107 pF per flip-flop) and stable performance over temperature. |
| Center-pin VCC/GND | Dual VCC and quad GND placement reduces ground loop inductance and improves signal integrity for >20-MHz operation. |
Applications
| Industrial PLC I/O Module | Legacy Bus Interface Adapter |
|---|---|
|
Use Scenario: Isolating and latching sensor data from 8-channel analog input cards before transmission over RS-485 backplane. IC Role / Device Role / Timing Role: Synchronous data capture and 3-state bus isolation; acts as output register synchronized to system clock edge. Use Value: Enables deterministic sampling of multiple sensors with precise timing alignment and prevents bus contention during data read cycles. |
Use Scenario: Bridging 8-bit ISA bus signals between vintage x86 CPU and modern FPGA-based peripheral controller. IC Role / Device Role / Timing Role: Bidirectional bus transceiver with direction control via OE; provides level translation and drive strength matching. Use Value: Eliminates need for discrete pull-ups or bus buffers while maintaining signal integrity across mixed-technology interfaces. |
| Test Equipment Digital Pattern Generator | Automated Test Fixture Control |
|
Use Scenario: Generating synchronized stimulus waveforms for IC functional testing using programmable logic and DACs. IC Role / Device Role / Timing Role: Parallel output register holding pattern bits; updated on system clock edge for glitch-free waveform edges. Use Value: Ensures zero hold-time violations and eliminates metastability risk in high-repetition test sequences up to 55 MHz. |
Use Scenario: Controlling solenoid valves, relays, and indicator LEDs in automated manufacturing test jigs with shared control bus. IC Role / Device Role / Timing Role: Output port expander with 3-state capability; allows dynamic reassignment of shared bus lines to different subsystems. Use Value: Reduces wiring complexity and connector count by enabling time-multiplexed control of 8 independent actuators. |
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 |
|---|---|---|---|
| 74ACT574N | Octal D-type transparent latch (not edge-triggered); identical pinout but lacks CLK edge sensitivity. | Suitable only where data must be held while input changes; not usable for synchronous clocked sampling. | Select 74ACT574N only if latch behavior (transparent vs. edge-triggered) matches system timing architecture. |
| SN74LVC823APWR | 3.3-V only operation; 24-pin TSSOP; higher speed (125 MHz), lower drive (±24 mA), and smaller Cpd (42 pF). | Requires level translation for 5-V systems; optimized for low-power portable or battery-operated designs. | Choose SN74LVC823APWR only when migrating to 3.3-V infrastructure and board space is constrained. |
Compared with 74ACT11374NT, 74ACT574N offers latch functionality instead of edge-triggering-critical for asynchronous data capture-but lacks clock synchronization. SN74LVC823APWR enables higher-frequency operation and lower power at the cost of voltage incompatibility and non-drop-in packaging.
Availability
74ACT11374NT is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy bus interface adapters, and automated test fixture control requiring stable component supply, long-term lifecycle support, and RoHS-compliant through-hole assembly.
Supply support for 74ACT11374NT 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The 74ACT11374NT belongs to TI's Advanced CMOS (ACT) logic family, designed specifically for high-speed, noise-immune 5-V digital systems requiring TTL compatibility, robust latch-up immunity, and reliable through-hole manufacturability.
FAQ
What is the maximum clock frequency supported by the 74ACT11374NT?
The 74ACT11374NT supports a maximum clock frequency of 55 MHz under recommended operating conditions (VCC = 4.5–5.5 V, TA = –40°C to 85°C). This value is verified across temperature and voltage extremes per TI's SCAS217A datasheet, with tPLH/tPHL propagation delays guaranteed ≤12.4 ns at 5.5 V.
Does the 74ACT11374NT require external pull-up resistors on its outputs?
No, the 74ACT11374NT does not require external pull-up resistors. Its 3-state outputs provide true high-impedance (Z) mode when OE is high, and actively drive both high and low logic levels (VOH ≥ 3.8 V, VOL ≤ 0.44 V at 24 mA) when enabled-eliminating need for passive termination in bus applications.
Is the 74ACT11374NT pin-compatible with other 74ACT-series octal flip-flops?
The 74ACT11374NT shares the same 24-pin PDIP (NT) footprint and pinout as other members of TI's 74ACT octal register family, including 74ACT374 and 74ACT574. However, functional differences exist: 74ACT11374NT uses edge-triggered D flip-flops, whereas 74ACT574 is a transparent latch-so pin compatibility does not imply functional interchangeability.
What is the latch-up immunity rating for the 74ACT11374NT?
The 74ACT11374NT has a typical latch-up immunity of 500 mA at 125°C, as specified in the absolute maximum ratings section of the SCAS217A datasheet. This exceeds JEDEC JESD78 Class II requirements and ensures resilience against transient current surges in electrically noisy industrial environments.
Can the 74ACT11374NT operate reliably at 4.5 V supply voltage?
Yes, the 74ACT11374NT is fully characterized for operation down to 4.5 V. Electrical specifications-including VOH ≥ 3.94 V, VOL ≤ 0.44 V, and tPLH/tPHL ≤ 12.4 ns-are guaranteed across the full 4.5–5.5 V range, making it suitable for systems with marginal 5-V regulation or brown-out conditions.
74ACT11374NT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 70 MHz
- Max Propagation Delay @ V, Max CL:
- 11.3ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-PDIP
74ACT11374NT FAQ
1.How can I place an order for 74ACT11374NT through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT11374NT 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 74ACT11374NT reliable?
The price and inventory of 74ACT11374NT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11374NT is usually 5 days.
3.What payment methods are accepted for 74ACT11374NT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11374NT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT11374NT?
74ACT11374NT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT11374NT 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 74ACT11374NT?
For technical support, including 74ACT11374NT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11374NT requirements.
6.How does Aetrix verify that 74ACT11374NT is sourced from the original manufacturer or authorized distributors?
All 74ACT11374NT 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 74ACT11374NT meets industry standards.
7.What is the process for return or replacement of 74ACT11374NT?
All 74ACT11374NT units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11374NT, 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 74ACT11374NT part is unused and in its original packaging.
Return procedure for 74ACT11374NT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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