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Texas Instruments 74ACT11240DW
- Part No.:
- 74ACT11240DW
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ACT11240DW.pdf
- Description:
- IC BUFF INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,997
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Product details
Overview
74ACT11240DW from Texas Instruments is an octal inverting buffer/line driver with 3-state outputs, designed for memory address, clock, and bus-oriented applications. It operates from −40°C to 85°C, supports 5-V supply (4.5–5.5 V), delivers ±24 mA output drive, features 6.5 ns typical tPLH propagation delay, and uses EPIC 1-µm CMOS process for high noise immunity and latch-up resistance.
For engineers reviewing the 74ACT11240DW datasheet, 74ACT11240DW pinout, 74ACT11240DW application, or 74ACT11240DW equivalent, key selection criteria include TTL-compatible inputs, symmetrical active-low OE control, flow-through pinout for PCB layout optimization, and 24-pin SOIC (DW) package compatibility with industrial temperature range and 500-mA latch-up immunity.
Technical Context
The 74ACT11240DW implements two independent 4-bit inverting buffers, each with dedicated active-low output-enable (OE) control. Its logic architecture ensures simultaneous 3-state control per group, enabling clean bus isolation during enable/disable transitions.
Designed using TI's EPIC (Enhanced-Performance Implanted CMOS) 1-µm process, it achieves TTL-voltage compatibility at the inputs while maintaining CMOS power efficiency and speed. Center-pin VCC/GND placement reduces high-speed switching noise by minimizing current loop area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures robust operation across standard 5-V rail tolerances without level-shifting. |
| Output Drive | ±24 mA - Sufficient to directly drive 50-Ω transmission lines or multiple TTL loads without external buffering. |
| Propagation Delay | 6.5 ns max (tPLH/tPHL) - Enables reliable operation in 100-MHz bus systems with timing margin. |
| Input Compatibility | TTL-voltage compatible (VIH = 2 V, VIL = 0.8 V) - Interfaces seamlessly with legacy TTL logic families. |
| Operating Temperature | −40°C to +85°C - Qualified for industrial environments without derating or thermal management overhead. |
| Latch-Up Immunity | 500 mA typical at 125°C - Meets JEDEC JESD78 requirements for robustness in noisy or fault-prone systems. |
| Power Dissipation | 1.7 W max (DW package, TA = 55°C) - Supports continuous operation in compact SOIC layouts with natural convection cooling. |
Pinout & Package
74ACT11240DW is housed in a 24-pin plastic small-outline integrated circuit (SOIC) package (DW), with center-aligned VCC (pins 14, 15, 16) and GND (pins 7, 8, 9, 10) terminals to minimize ground bounce and supply noise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1Y1–1Y4, 2Y1–2Y4 | Inverting 3-state outputs | Eight buffered, inverted outputs grouped into two banks; each bank independently controlled by its OE signal. |
| 1A1–1A4, 2A1–2A4 | Inverting input signals | Eight TTL-compatible inputs driving respective Y outputs; no internal inversion beyond gate function. |
| 1OE, 2OE | Active-low output-enable | Separate enables per 4-bit group allow selective bus partitioning without affecting other channels. |
| VCC (pins 14, 15, 16) | Positive supply | Three parallel VCC pins reduce IR drop and improve high-frequency decoupling effectiveness. |
| GND (pins 7, 8, 9, 10) | Ground reference | Four contiguous GND pins provide low-inductance return path for all I/O and core logic currents. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input-to-output pin alignment (e.g., 1A1→1Y1 adjacent) minimizes trace crossovers and improves signal integrity on dense PCBs. |
| Center-pin VCC/GND | Reduced simultaneous switching noise (SSN) by shortening high-current supply/return loops-critical for >20-MHz bus operation. |
| EPIC 1-µm CMOS process | Enables TTL compatibility with CMOS power efficiency, achieving 80 µA max ICC (quiescent) and 1 mA typical dynamic supply current. |
| 500-mA latch-up immunity | Guarantees survival under transient overvoltage or ESD events without destructive failure-no system-level reset required. |
| 24-pin SOIC (DW) package | Industry-standard footprint compatible with automated assembly, reflow, and legacy socketing infrastructure. |
Applications
| Memory Address Buffering | Clock Distribution |
|---|---|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or ROM chips in a shared-bus embedded system. IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating CPU address bus from memory devices during DMA or refresh cycles. Use Value: Symmetrical OE control allows precise timing of bus release, preventing address glitches during state transitions. |
Use Scenario: Distributing a single system clock to multiple synchronous peripherals (e.g., ADC, UART, timer modules). IC Role / Device Role / Timing Role: Low-skew, fan-out-enhanced clock driver with TTL-compatible input and 24-mA drive capability. Use Value: 6.5 ns max propagation delay and matched tPLH/tPHL ensure <1 ns skew across all eight outputs. |
| Bus Transceiver Interface | Industrial Control Backplane |
Use Scenario: Bidirectional data bus isolation between processor and peripheral modules using external direction control. IC Role / Device Role / Timing Role: Dual-group 3-state buffer enabling half-duplex bus sharing with independent enable per segment. Use Value: Separate 1OE/2OE pins permit staggered enable timing to avoid bus contention during direction switching. |
Use Scenario: Interfacing PLC I/O modules to a central controller via a ruggedized 24-V backplane with noise suppression. IC Role / Device Role / Timing Role: Level-translating and noise-immune buffer for digital control signals in electrically noisy factory environments. Use Value: 500-mA latch-up immunity and −40°C to +85°C rating ensure uninterrupted operation near motors and contactors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT240DW | Same pinout, identical electrical specs, but includes both inverting and non-inverting outputs per package (dual-function). | Required when mixed polarity buffering is needed on same bus segment; adds design flexibility but increases complexity. | Select 74ACT240DW only if non-inverting paths are explicitly required-otherwise 74ACT11240DW offers simpler logic mapping. |
| SN74ACT11240DWR | Same die, but in 24-pin SOIC tape-and-reel (DWR) packaging; identical AC/DC specs and thermal performance. | Suitable for high-volume automated assembly where tube packaging (DW) is incompatible with pick-and-place feeders. | Choose SN74ACT11240DWR for SMT production runs; 74ACT11240DW remains optimal for prototyping and low-volume builds. |
Compared with 74ACT240DW and SN74ACT11240DWR, the 74ACT11240DW provides dedicated inverting functionality in tube packaging-ideal for development, validation, and medium-volume industrial designs where pin-for-pin simplicity and ease of manual handling are prioritized.
Availability
74ACT11240DW is available at Aetrix Electronics and suitable for memory address buffering, clock distribution, and industrial backplane interface applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature qualification.
Supply support for 74ACT11240DW 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 heritage in high-reliability industrial and automotive-grade components.
The 74ACT11240DW belongs to TI's ACT (Advanced CMOS Technology) logic family-engineered for TTL-compatible interfacing with superior speed, noise immunity, and latch-up robustness in demanding industrial control and computing systems.
FAQ
What is the operating voltage range for the 74ACT11240DW?
The 74ACT11240DW operates over a supply voltage range of 4.5 V to 5.5 V, with full specification compliance-including propagation delay, drive strength, and noise margins-at all points within this range. This ensures compatibility with standard 5-V systems even under rail sag or ripple conditions commonly seen in industrial power supplies.
Does the 74ACT11240DW support TTL-level inputs?
Yes, the 74ACT11240DW features TTL-voltage compatible inputs, with VIH specified at 2.0 V minimum and VIL at 0.8 V maximum-matching standard TTL logic thresholds. This eliminates the need for external level shifters when interfacing with legacy 74LS or 74F series devices.
How many independent output-enable controls does the 74ACT11240DW have?
The 74ACT11240DW has two independent active-low output-enable inputs: 1OE controls outputs 1Y1–1Y4, and 2OE controls outputs 2Y1–2Y4. This dual-enable architecture enables selective bus segmentation-for example, isolating memory address bits 0–3 from bits 4–7 without disabling the entire device.
What is the maximum propagation delay of the 74ACT11240DW at 25°C?
At TA = 25°C and VCC = 5 V, the 74ACT11240DW exhibits a maximum propagation delay of 10.6 ns for tPLH and 8.7 ns for tPHL. These values are guaranteed across the full industrial temperature range (−40°C to +85°C), ensuring timing predictability in real-world operating conditions.
Is the 74ACT11240DW pin-compatible with other 24-pin SOIC octal buffers?
The 74ACT11240DW shares the same 24-pin SOIC (DW) footprint and pinout with industry-standard octal buffers including the 74ACT240 and 74ACT541, but differs in logic function (inverting-only vs. inverting/non-inverting or non-inverting-only). Pin compatibility exists mechanically and electrically for VCC, GND, and I/O placement-but functional substitution requires verification of signal polarity and enable behavior.
74ACT11240DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, 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
74ACT11240DW FAQ
1.How can I place an order for 74ACT11240DW through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT11240DW 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 74ACT11240DW reliable?
The price and inventory of 74ACT11240DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11240DW is usually 5 days.
3.What payment methods are accepted for 74ACT11240DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11240DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT11240DW?
74ACT11240DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT11240DW 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 74ACT11240DW?
For technical support, including 74ACT11240DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11240DW requirements.
6.How does Aetrix verify that 74ACT11240DW is sourced from the original manufacturer or authorized distributors?
All 74ACT11240DW 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 74ACT11240DW meets industry standards.
7.What is the process for return or replacement of 74ACT11240DW?
All 74ACT11240DW units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11240DW, 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 74ACT11240DW part is unused and in its original packaging.
Return procedure for 74ACT11240DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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