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Texas Instruments 74ACT11244DWR
- Part No.:
- 74ACT11244DWR
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ACT11244DWR.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,403
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Product details
Overview
74ACT11244DWR from Texas Instruments is an octal noninverting 3-state buffer/line driver designed for memory address and bus driving applications. It features TTL-compatible inputs, 5-V supply operation (4.5–5.5 V), ±24-mA output drive, 1.5–9.9-ns propagation delay, and SOIC-24 package with center-pin VCC/GND for noise reduction.
For engineers reviewing the 74ACT11244DWR datasheet, 74ACT11244DWR pinout, 74ACT11244DWR application, or 74ACT11244DWR equivalent, this page delivers verified electrical specs, flow-through PCB layout advantages, EPIC CMOS process benefits, latch-up immunity (500 mA at 125°C), and real-world use cases in industrial control and legacy system upgrades.
Technical Context
The 74ACT11244DWR implements dual 4-bit noninverting buffers with independent 3-state enable controls (1OE, 2OE), supporting high-density bus interfacing without signal inversion. Its flow-through pinout-inputs on one side, outputs on the opposite-reduces trace crossovers and improves signal integrity in memory address routing.
Manufactured using Texas Instruments' EPIC 1-µm CMOS process, it combines TTL-level input compatibility with CMOS power efficiency and robust ESD/latch-up performance. The center-aligned VCC and GND pins (pins 13 and 14) minimize simultaneous switching noise during high-speed bus toggling.
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 systems. |
| Output Drive | ±24 mA - Sufficient to drive 50-Ω transmission lines or multiple TTL loads without external buffering. |
| Propagation Delay | 1.5–9.9 ns - Enables reliable operation in high-speed address/data buses up to ~100 MHz clock domains. |
| Input Compatibility | TTL-voltage thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) - Allows direct interfacing with legacy 74LS/74F logic without level shifters. |
| Operating Temperature | −40°C to +85°C - Qualified for industrial environments including programmable logic controllers and instrumentation. |
| Power Dissipation | 1.7 W (DW package, TA = 55°C) - Supports sustained operation in compact board layouts with moderate airflow. |
| Latch-Up Immunity | 500 mA typical at 125°C - Meets stringent reliability requirements for mission-critical embedded systems. |
Pinout & Package
74ACT11244DWR is housed in a 24-pin SOIC (DW) package (7.5 mm × 15.4 mm, 1.27 mm pitch), with center-pin VCC (pin 13) and GND (pin 14) for optimized high-speed noise suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1Y1–1Y4, 2Y1–2Y4 | Noninverting buffered outputs | Eight 3-state outputs grouped into two banks, each independently controlled by OE signals. |
| 1A1–1A4, 2A1–2A4 | Noninverting data inputs | Eight TTL-compatible inputs accepting 0.8 V / 2.0 V thresholds; flow-through placement simplifies PCB routing. |
| 1OE, 2OE | Active-low output enable | Separate enables per 4-bit bank allow partial bus isolation without disabling entire device. |
| VCC (pin 13) | Positive supply | Center-positioned to reduce ground bounce and supply noise coupling across output drivers. |
| GND (pin 14) | Ground reference | Adjacent to VCC to minimize loop inductance and improve transient current return path integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input-to-output pin alignment eliminates layer changes and vias in dense bus routing, reducing signal skew and EMI. |
| Center-pin VCC/GND | Reduces simultaneous switching noise by shortening high-frequency current loops between supply and ground pins. |
| EPIC CMOS process | Delivers TTL-compatible input levels with CMOS low static power (<80 µA ICC) and high noise margin (≥0.4 V). |
| 500-mA latch-up immunity | Enables robust operation in electrically noisy industrial settings where voltage transients may exceed absolute max ratings. |
| 3-State output control | Independent OE pins permit dynamic bus arbitration-e.g., enabling only active memory address segments while tri-stating others. |
Applications
| Memory Address Buffering | Legacy System Bus Interface |
|---|---|
|
Use Scenario: Driving 16-bit address bus in industrial PLC backplane with mixed 74LS and microcontroller sources. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address outputs from peripheral decoders while maintaining timing integrity. Use Value: Flow-through pinout reduces trace length mismatch; ±24-mA drive ensures full TTL fanout without added buffers. |
Use Scenario: Interfacing FPGA I/O banks to legacy ISA-style expansion slots requiring 5-V tolerant, high-drive buffers. IC Role / Device Role / Timing Role: Level-shifting and bus-driving interface between modern low-voltage FPGA and legacy 5-V peripherals. Use Value: TTL-compatible inputs accept FPGA 3.3-V LVTTL outputs directly; 1.5-ns min tPLH preserves setup/hold margins. |
| Industrial Control Backplane | Test Equipment Signal Routing |
|
Use Scenario: Multiplexing sensor address lines across shared diagnostic bus in modular test rack with hot-swap capability. IC Role / Device Role / Timing Role: Dual-bank 3-state driver enabling selective activation of sensor modules without bus contention. Use Value: Independent 1OE/2OE allows staggered enable sequencing; center VCC/GND minimizes noise during hot-plug transitions. |
Use Scenario: Routing calibrated timing signals from pattern generator to multiple DUT interfaces in ATE systems. IC Role / Device Role / Timing Role: Low-skew, high-fanout buffer preserving edge fidelity across parallel signal paths. Use Value: 9.9-ns max tPHL and matched tPLH/tPHL ensure <100-ps inter-channel skew critical for synchronized stimulus delivery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal noninverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT244N | Dual 4-bit noninverting buffer in PDIP-20; lacks center VCC/GND and flow-through pinout; 20-pin vs. 24-pin footprint. | Preferred for through-hole prototyping or legacy DIP-based designs; not drop-in compatible due to pin count and layout mismatch. | Select when board space allows DIP packaging and noise sensitivity is lower; verify PCB layout supports non-flow-through routing. |
| 74ACT11240DWR | Inverting counterpart (same DW-24 package, identical timing/noise specs); functionally complementary-not interchangeable without logic inversion. | Used where inverted bus enable or address complement is required; shares same thermal and layout characteristics. | Choose when system logic requires inversion; otherwise, 74ACT11244DWR remains optimal for noninverting signal paths. |
Compared with SN74ACT244N, the 74ACT11244DWR offers superior noise immunity via center VCC/GND and optimized PCB routing; compared with 74ACT11240DWR, it provides identical performance for noninverting applications without requiring downstream logic correction.
Availability
74ACT11244DWR is available at Aetrix Electronics and suitable for industrial control backplanes, legacy system upgrades, and automated test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOIC packaging.
Supply support for 74ACT11244DWR 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 over 90 years of innovation in industrial, automotive, and communications markets.
The 74ACT11244DWR belongs to TI's advanced CMOS logic family, engineered for high-speed, noise-resilient interfacing in industrial automation and legacy system modernization where reliability and pin-compatible upgrade paths matter.
FAQ
What is the operating voltage range for the 74ACT11244DWR?
The 74ACT11244DWR operates from 4.5 V to 5.5 V. This range ensures compatibility with standard 5-V TTL and CMOS logic families while maintaining specified timing, drive strength, and noise margin performance across the full industrial temperature range (−40°C to +85°C). Operation outside this range may result in undefined behavior or reduced reliability.
Does the 74ACT11244DWR support TTL-level input signals?
Yes, the 74ACT11244DWR accepts TTL-voltage-compatible inputs: VIL ≤ 0.8 V (guaranteed low) and VIH ≥ 2.0 V (guaranteed high). This allows direct connection to legacy 74LS, 74F, and other TTL-series devices without level-shifting circuitry, preserving signal integrity and simplifying system integration.
What is the maximum output current rating for the 74ACT11244DWR?
The 74ACT11244DWR is rated for ±24 mA per output under recommended operating conditions. This drive strength supports fanout to multiple TTL loads or termination of 50-Ω transmission lines. Absolute maximum ratings allow ±50 mA briefly, but sustained operation above ±24 mA risks exceeding thermal limits or degrading timing specifications.
How does the flow-through pinout of the 74ACT11244DWR benefit PCB design?
The flow-through pinout places all inputs on one side (pins 1–11, 15–16) and all outputs on the opposite side (pins 1–4, 9–12), enabling straight-line trace routing without vias or layer jumps. This reduces signal skew, crosstalk, and board area-especially valuable in dense memory address or data bus layouts where timing and density are critical.
Is the 74ACT11244DWR pin-compatible with other members of the 'ACT1124x family?
Yes-the 74ACT11244DWR shares the same SOIC-24 (DW) package, pinout, and electrical interface with 74ACT11240DWR (inverting version) and 74ACT11244DBR (SSOP-24 variant). However, substitution with 74ACT11240DWR requires logic inversion in the system; physical pin compatibility does not imply functional interchangeability without design review.
74ACT11244DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
74ACT11244DWR FAQ
1.How can I place an order for 74ACT11244DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT11244DWR 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 74ACT11244DWR reliable?
The price and inventory of 74ACT11244DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11244DWR is usually 5 days.
3.What payment methods are accepted for 74ACT11244DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11244DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT11244DWR?
74ACT11244DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT11244DWR 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 74ACT11244DWR?
For technical support, including 74ACT11244DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11244DWR requirements.
6.How does Aetrix verify that 74ACT11244DWR is sourced from the original manufacturer or authorized distributors?
All 74ACT11244DWR 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 74ACT11244DWR meets industry standards.
7.What is the process for return or replacement of 74ACT11244DWR?
All 74ACT11244DWR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11244DWR, 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 74ACT11244DWR part is unused and in its original packaging.
Return procedure for 74ACT11244DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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