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Texas Instruments 74AC11374DWR
- Part No.:
- 74AC11374DWR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
74AC11374DWR.pdf
- Description:
- BUS DRIVER, AC SERIES, 8-BIT,
- Quantity:
- Payment:
- Shipping:
Inventory:11,741
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Product details
Overview
74AC11374DWR from Texas Instruments is an octal D-type edge-triggered flip-flop with 3-state outputs in a 24-pin SOIC (DW) package, operating from −40°C to 85°C at VCC = 3–5.5 V. It features positive-edge clock triggering, independent output-enable control, and bus-driving capability with ±24 mA output drive at 5 V. It is used in bidirectional bus interfaces and I/O port expansion.
For engineers reviewing the 74AC11374DWR datasheet, 74AC11374DWR pinout, 74AC11374DWR application, or 74AC11374DWR 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), and real-world use context for legacy logic system design and bus buffering.
Technical Context
This device implements eight independent D-type flip-flops sharing a common clock (CLK) and output-enable (OE) input. Each flip-flop captures D-input data on the rising edge of CLK and holds it until the next active clock edge. OE controls all eight outputs simultaneously, placing them in high-impedance (Z) state without affecting internal latch operation.
The 74AC11374DWR uses EPIC (Enhanced-Performance Implanted CMOS) 1-μm process technology, delivering 500-mA latch-up immunity at 125°C and optimized flow-through pinout for PCB layout. Its center-pin VCC/GND configuration reduces high-speed switching noise, supporting stable operation in dense digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | Advanced CMOS (AC), compatible with TTL input thresholds |
| Supply Voltage Range | 3 V to 5.5 V - supports mixed-voltage system interfacing |
| Max Clock Frequency | 95 MHz at VCC = 5 V - enables high-speed synchronous data latching |
| Output Drive Strength | ±24 mA at VCC = 5 V - sufficient to drive 50-pF loads or standard TTL inputs |
| Propagation Delay (tPLH/tPHL) | ≤ 10.2 ns at VCC = 5 V - ensures tight timing margins in fast bus cycles |
| 3-State Enable/Disable Time | tPZL ≤ 9.4 ns, tPHZ ≤ 11.2 ns at VCC = 5 V - minimizes bus contention windows |
| Operating Temperature | −40°C to +85°C - qualified for industrial environment deployment |
Pinout & Package
74AC11374DWR is housed in a 24-pin plastic small-outline integrated circuit (SOIC) package (DW), with 300-mil width, gull-wing leads, and JEDEC MS-013 compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 21–24 | D₁–D₄, D₅–D₈ | Data inputs for each of eight flip-flops; sampled on CLK↑ |
| 5–8 | GND (×4) | Four dedicated ground pins reduce ground bounce and improve noise immunity |
| 9–12 | Q₁–Q₄ | True 3-state outputs; high-impedance when OE = H |
| 13 | OE | Active-low output enable; disables all Q outputs simultaneously |
| 14 | CLK | Common clock input; positive-edge triggered for all flip-flops |
| 15–18 | Q₅–Q₈ | True 3-state outputs; functionally identical to Q₁–Q₄ |
| 19–20 | VCC (×2) | Two dedicated power pins minimize supply impedance and decoupling complexity |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input (D) and output (Q) pins arranged on opposite sides to simplify PCB trace routing and reduce crosstalk |
| Center-pin VCC/GND | Dual VCC and quad GND pins centered in package reduce simultaneous switching noise and improve signal integrity |
| Independent OE control | OE does not affect internal flip-flop state - data retention and loading possible while outputs are disabled |
| EPIC CMOS process | 1-μm fabrication yields 500-mA latch-up immunity at 125°C, enhancing robustness in noisy environments |
| Bus-driver optimized outputs | 3-state outputs rated for ±24 mA drive support direct connection to capacitive buses without external buffers |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Buffering |
|---|---|
Use Scenario: Adding parallel digital I/O capability to programmable logic controllers using ISA or VME backplanes. IC Role / Device Role / Timing Role: Acts as an 8-bit synchronized input latch and tri-state output register, isolating field-side signals from controller bus timing. Use Value: Enables deterministic sampling of sensor inputs and glitch-free output updates via shared CLK and OE control, reducing firmware overhead. |
Use Scenario: Interfacing microprocessor address/data buses to peripheral devices with mismatched timing or drive strength. IC Role / Device Role / Timing Role: Provides level-shifted, latched, and bus-isolated data path between CPU and slower peripherals (e.g., ADCs, DACs, EEPROM). Use Value: Eliminates need for discrete pull-ups or bus transceivers by delivering ±24 mA drive and sub-10 ns 3-state transitions at 5 V. |
| Bidirectional Data Bus Transceiver | Buffer Register for Test Equipment |
Use Scenario: Implementing half-duplex communication on shared 8-bit data buses in automated test systems. IC Role / Device Role / Timing Role: Functions as direction-controlled register: D inputs capture upstream data on CLK↑, Q outputs drive downstream bus when OE = L. Use Value: Supports precise timing alignment across multiple 74AC11374DWR devices using common CLK/OE, enabling synchronized multi-byte transfers. |
Use Scenario: Capturing and holding stimulus patterns during high-speed digital pattern generation or boundary-scan testing. IC Role / Device Role / Timing Role: Serves as static hold register - retains pattern after clock edge while test sequencer executes other operations. Use Value: Maintains stable output during OE high-impedance state, allowing safe reconfiguration of adjacent logic without bus contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT138N | 3-to-8 decoder (not flip-flop); no storage, no CLK or OE | Used for address decoding, not data latching or bus driving | Not functionally substitutable - lacks sequential logic and 3-state outputs |
| 74AC574DW | Octal D-type latch (edge-triggered), same DW package, but single OE per group of 4 outputs | Less flexible bus control - requires two OE signals vs. one for full 8-bit control | Acceptable where partial bus isolation suffices; otherwise 74AC11374DWR offers superior centralized control |
Compared with SN74ACT138N and 74AC574DW, the 74AC11374DWR uniquely combines full 8-bit edge-triggered storage, single-pin OE control, and bus-optimized 3-state outputs - making it the only direct fit for applications requiring synchronized, isolated 8-bit register functionality with minimal control logic.
Availability
74AC11374DWR is available at Aetrix Electronics and suitable for industrial automation, legacy computing upgrades, and test equipment requiring stable component supply despite its obsolete status - supported via verified surplus channels and long-term inventory commitments.
Supply support for 74AC11374DWR 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 reach.
The 74AC11374DWR belongs to TI's AC-series advanced CMOS logic family, designed for high-speed, low-power, TTL-compatible digital interface and data-path applications in industrial control and legacy system upgrades.
FAQ
What is the function of the OE pin on the 74AC11374DWR?
The OE (output enable) pin on the 74AC11374DWR is an active-low control that places all eight Q outputs into high-impedance state when asserted high. It does not affect internal flip-flop operation - data can be latched or retained while outputs remain isolated. This allows safe bus sharing without contention, and is critical for multi-master or hot-swap-capable designs using the 74AC11374DWR.
Does the 74AC11374DWR support 3.3 V operation?
Yes, the 74AC11374DWR supports 3.3 V operation within its specified supply range of 3 V to 5.5 V. At VCC = 3.3 V, it delivers guaranteed 75 MHz maximum clock frequency, 2.58 V VOH (IOH = −4 mA), and 0.44 V VOL (IOL = 12 mA), making it interoperable with mixed-voltage 3.3 V/5 V systems when used with appropriate level-aware timing margins for the 74AC11374DWR.
What is the pin count and package type of the 74AC11374DWR?
The 74AC11374DWR uses a 24-pin plastic small-outline (SOIC) package designated DW, with 300-mil body width and gull-wing leads. Its pinout features dual VCC (pins 19–20), quad GND (pins 5–8), and flow-through arrangement - D inputs on left, Q outputs on right - optimizing PCB layout for the 74AC11374DWR in high-density digital boards.
Is the 74AC11374DWR still in active production?
No, the 74AC11374DWR is marked OBSOLETE by Texas Instruments per their packaging addendum. However, Aetrix Electronics maintains verified inventory through authorized surplus channels with full traceability, enabling continued use in maintenance, repair, and legacy system sustainment programs relying on the 74AC11374DWR.
How does the 74AC11374DWR differ from standard 74AC574 devices?
The 74AC11374DWR integrates eight independent D-type flip-flops with a single global OE pin and flow-through pinout, whereas the 74AC574DW groups outputs into two banks each controlled by separate OE pins. The 74AC11374DWR also features center-placed VCC/GND pins to suppress noise - a distinction critical for stable high-speed bus operation not found in the base 74AC574 design.
74AC11374DWR 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:
- -
74AC11374DWR FAQ
1.How can I place an order for 74AC11374DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC11374DWR 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 74AC11374DWR reliable?
The price and inventory of 74AC11374DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC11374DWR is usually 5 days.
3.What payment methods are accepted for 74AC11374DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC11374DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC11374DWR?
74AC11374DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC11374DWR 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 74AC11374DWR?
For technical support, including 74AC11374DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC11374DWR requirements.
6.How does Aetrix verify that 74AC11374DWR is sourced from the original manufacturer or authorized distributors?
All 74AC11374DWR 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 74AC11374DWR meets industry standards.
7.What is the process for return or replacement of 74AC11374DWR?
All 74AC11374DWR units undergo pre-shipment inspection (PSI). If there is an issue with 74AC11374DWR, 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 74AC11374DWR part is unused and in its original packaging.
Return procedure for 74AC11374DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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