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Texas Instruments 74ACT11240DWR
- Part No.:
- 74ACT11240DWR
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ACT11240DWR.pdf
- Description:
- IC BUFF INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:94,457
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Product details
Overview
74ACT11240DWR 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 at VCC = 4.5–5.5 V, delivers ±24 mA output drive, supports TTL-voltage-compatible inputs, and features flow-through pinout for optimized PCB layout.
For engineers reviewing the 74ACT11240DWR datasheet, 74ACT11240DWR pinout, 74ACT11240DWR application, or 74ACT11240DWR equivalent, key selection criteria include 3-state output timing (tPLH/tPHL ≤ 10.6 ns), latch-up immunity (500 mA at 125°C), EPIC CMOS process, and SOIC-24 package compatibility with industrial temperature range.
Technical Context
The 74ACT11240DWR implements dual 4-bit inverting buffers with independent active-low output-enable (OE) controls per group - 1OE enables Y1–Y4, 2OE enables Y5–Y8. Each buffer provides symmetrical drive strength and high noise immunity via center-pin VCC/GND configuration.
It uses Texas Instruments' EPIC 1-μm CMOS process, enabling TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V) while maintaining CMOS-level power efficiency (ICC ≤ 80 μA static, 0.9–1 mA dynamic). Absolute max ratings include VCC up to 6 V and output clamp current of ±50 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across standard 5-V logic rails with ±10% tolerance. |
| Output Drive | ±24 mA - Sufficient to drive 50-Ω transmission lines or multiple TTL loads without external buffering. |
| Propagation Delay | tPLH/tPHL ≤ 10.6 ns @ VCC = 5 V - Enables reliable operation in high-speed address/clock distribution up to ~50 MHz. |
| 3-State Enable/Disable | tPZH/tPZL ≤ 12.5 ns - Fast bus turnaround time critical for bidirectional data bus arbitration. |
| Input Compatibility | TTL-voltage compatible (VIH = 2.0 V, VIL = 0.8 V) - Direct interface with legacy 74LS/TTL logic without level shifters. |
| Latch-Up Immunity | 500 mA typical @ 125°C - Robustness against transient current surges in industrial environments. |
| Power Dissipation | 1.7 W (DW package, TA = 55°C) - Supports continuous operation in compact SOIC-24 layouts with adequate airflow. |
Pinout & Package
74ACT11240DWR is housed in a 24-pin plastic small-outline integrated circuit (SOIC) package (DW), with 300-mil body width, gull-wing leads, and RoHS-compliant NiPdAu finish. Pin 1 is marked by a beveled corner or notch; VCC (pins 14, 15, 16, 17) and GND (pins 1, 2, 3, 4) are distributed centrally to minimize switching noise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4 | Buffer Inputs | Eight TTL-compatible digital inputs grouped into two 4-bit banks; inverted at outputs. |
| 1Y1–1Y4, 2Y1–2Y4 | 3-State Inverting Outputs | Eight buffered, inverted outputs; high-impedance when respective OE is high. |
| 1OE, 2OE | Active-Low Output Enable | Independent control of each 4-bit output group; low enables, high disables (3-state). |
| VCC (pins 14–17) | Supply Voltage | Four dedicated VCC pins reduce IR drop and improve high-frequency decoupling. |
| GND (pins 1–4) | Ground Reference | Four GND pins provide low-inductance return paths, critical for EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input-to-output signal path runs left-to-right across package, minimizing trace crossovers and layer count on dense PCBs. |
| Center-pin VCC/GND | Dual VCC and quad GND pins placed centrally suppress simultaneous switching noise (SSN) in high-speed bus drivers. |
| EPIC CMOS process | 1-μm implanted CMOS ensures consistent parametric performance across −40°C to 85°C with low leakage and high reliability. |
| 500-mA latch-up immunity | Exceeds JEDEC JESD78 Class II requirements, enabling use in noisy industrial power domains without protection circuitry. |
| TTL-input compatibility | Accepts standard TTL logic levels directly-no external biasing or level translation needed for mixed-logic-system interfacing. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving multiplexed address lines to SRAM or ROM in microcontroller-based embedded systems with limited drive capability. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing fan-out expansion and bus isolation during memory access cycles. Use Value: Enables clean address settling with tPLH ≤ 10.6 ns and eliminates contention via fast OE-controlled 3-state disable (tPZL ≤ 12.3 ns). |
Use Scenario: Distributing a single system clock to multiple synchronous peripherals (e.g., ADC, DAC, UART) while maintaining edge integrity. IC Role / Device Role / Timing Role: Low-skew, inverting line driver with matched propagation delays across all eight outputs. Use Value: Symmetrical tPLH/tPHL (≤ 10.6 ns) and low output capacitance (Co = 10 pF) preserve rise/fall times and minimize jitter accumulation. |
| Bus Transceiver Interface | Industrial I/O Expansion |
Use Scenario: Bidirectional data bus isolation between MCU and peripheral modules (e.g., display controller, sensor hub) using shared data lines. IC Role / Device Role / Timing Role: Dual-group 3-state driver enabling direction-controlled bus access with independent OE control per group. Use Value: Independent 1OE/2OE pins allow staggered enable timing to prevent bus contention; ±24 mA drive sustains signal integrity over 10-cm traces. |
Use Scenario: Expanding GPIO count in programmable logic controllers (PLCs) or motor control units requiring robust 5-V logic interfacing. IC Role / Device Role / Timing Role: Industrial-grade buffer translating MCU GPIO signals to noise-immune bus drivers with latch-up resilience. Use Value: 500-mA latch-up immunity and −40°C to 85°C rating ensure uninterrupted operation in factory-floor thermal and EMI environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting 3-state 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 group (dual-function). | Required where mixed polarity buffering is needed; not drop-in if only inverting function is used and board space is constrained. | Select 74ACT240DW only when non-inverting outputs are actively utilized; otherwise 74ACT11240DWR offers simpler logic mapping. |
| SN74ACT11240DWR | Identical device - SN74ACT11240DWR is the full TI part number prefix; 74ACT11240DWR is the common shorthand used in schematics and BOMs. | No functional or application difference; same package, specs, and qualification. | SN74ACT11240DWR and 74ACT11240DWR refer to the exact same component; use either based on BOM convention. |
Compared with 74ACT11240DWR, the 74ACT240DW adds design flexibility at the cost of increased logic complexity, while SN74ACT11240DWR is a naming variant-not a distinct part-with identical performance, footprint, and qualification.
Availability
74ACT11240DWR is available at Aetrix Electronics and suitable for memory address buffering, clock distribution networks, and industrial I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ACT11240DWR 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 74ACT11240DWR belongs to TI's advanced CMOS logic family, engineered for high-speed, low-noise bus interfacing in mission-critical industrial and computing systems where reliability and signal fidelity are paramount.
FAQ
What is the operating temperature range for the 74ACT11240DWR?
74ACT11240DWR is characterized for operation from −40°C to +85°C. This industrial temperature range is verified per TI's SCAS210A datasheet and applies to all guaranteed electrical specifications including propagation delay, output drive, and 3-state timing. The device maintains full functionality across this range without derating.
Does the 74ACT11240DWR support TTL-level inputs?
Yes, the 74ACT11240DWR features TTL-voltage-compatible inputs with guaranteed VIH = 2.0 V (min) and VIL = 0.8 V (max) at VCC = 5 V. This allows direct connection to 74LS, 74F, and other legacy TTL families without level-shifting circuitry, simplifying mixed-logic designs.
What is the maximum output current specification for the 74ACT11240DWR?
The 74ACT11240DWR specifies ±24 mA DC output current per pin under recommended operating conditions (VCC = 4.5–5.5 V, TA = −40°C to 85°C). This is measured at VOL ≤ 0.44 V and VOH ≥ 3.8 V, ensuring robust drive into standard 50-Ω loads or multiple TTL inputs.
Is the 74ACT11240DWR pin-compatible with other 74ACT-series octal buffers?
74ACT11240DWR shares the same SOIC-24 pinout with 74ACT240DW and 74ACT541DW, but differs in logic function: it provides only inverting outputs with dual OE controls, whereas others offer non-inverting or mixed outputs. Pin compatibility does not imply functional interchangeability without logic redesign.
What package type and lead finish does the 74ACT11240DWR use?
74ACT11240DWR is supplied in a 24-pin SOIC (DW) package with NiPdAu (NIPDAU) lead finish, RoHS-compliant, and MSL Level-1 rated for unlimited reflow at 260°C peak. The DW package measures 15.4 mm × 7.5 mm × 2.35 mm and is supplied in tubes of 25 units.
74ACT11240DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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
74ACT11240DWR FAQ
1.How can I place an order for 74ACT11240DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT11240DWR 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 74ACT11240DWR reliable?
The price and inventory of 74ACT11240DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11240DWR is usually 5 days.
3.What payment methods are accepted for 74ACT11240DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11240DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT11240DWR?
74ACT11240DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT11240DWR 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 74ACT11240DWR?
For technical support, including 74ACT11240DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11240DWR requirements.
6.How does Aetrix verify that 74ACT11240DWR is sourced from the original manufacturer or authorized distributors?
All 74ACT11240DWR 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 74ACT11240DWR meets industry standards.
7.What is the process for return or replacement of 74ACT11240DWR?
All 74ACT11240DWR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11240DWR, 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 74ACT11240DWR part is unused and in its original packaging.
Return procedure for 74ACT11240DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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