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Texas Instruments SN74ACT2441PQ
- Part No.:
- SN74ACT2441PQ
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74ACT2441PQ.pdf
- Description:
- INTERFACE CIRCUIT, CMOS,
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Inventory:15,497
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Product details
Overview
SN74ACT2441PQ from Texas Instruments is an octal 3-state buffer/driver IC designed for bus-oriented data transmission, clock distribution, and memory address driving in 5-V TTL-compatible systems. It features dual 4-bit channels with independent active-low output-enable (OE) controls, 4.5–5.5 V supply operation, ≤9.5 ns propagation delay at 5 V, and ±24 mA output drive per channel. It is used in LED display drivers and telecom switching networks where high-drive, low-skew buffering is required.
For engineers reviewing the SN74ACT2441PQ datasheet, SN74ACT2441PQ pinout, SN74ACT2441PQ application, or SN74ACT2441PQ equivalent, key selection criteria include 3-state bus interface capability, TTL-compatible input thresholds, guaranteed 24-mA sink/source drive, thermal performance in VQFN packaging, and compatibility with 5-V logic families in industrial temperature range (–40°C to +85°C).
Technical Context
The SN74ACT2441PQ implements two independent 4-bit non-inverting buffer sections, each controlled by a dedicated active-low OE input. When OE is low, A→Y data passes transparently; when OE is high, outputs enter high-impedance state-enabling bidirectional bus sharing without external isolation.
Its ACT (Advanced CMOS TTL-compatible) logic family delivers rail-to-rail output swing, fast edge rates (≤8 ns/V input transition), and robust noise immunity with VIH = 2.0 V min and VIL = 0.8 V max at 5 V VCC. All inputs tolerate up to 5.5 V, supporting mixed-voltage interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across standard 5-V supply tolerances and brown-out margins. |
| tpd (Max) | 9.5 ns at 5 V - Enables reliable timing in high-speed bus applications up to ~100 MHz clock domains. |
| IOL / IOH | ±24 mA - Supports direct LED driving (with current-limiting resistors) and fan-out to ≥10 standard TTL loads. |
| VIH / VIL | 2.0 V / 0.8 V - Guarantees interoperability with legacy TTL and 5-V CMOS logic without level-shifting. |
| IOZ (High-Z leakage) | ±2.5 µA at 5.5 V - Minimizes bus contention current and signal integrity degradation during tri-state operation. |
| Operating Temp | –40°C to +85°C - Qualified for industrial-grade embedded systems including telecom infrastructure and control panels. |
| ESD Rating (HBM) | ±3000 V - Meets IEC 61000-4-2 Level 3 for robust handling in automated assembly and field service. |
Pinout & Package
The SN74ACT2441PQ is packaged in a 20-pin VQFN (RKS) with exposed thermal pad, measuring 3.5 mm × 4.5 mm × 0.8 mm (body), optimized for high-density PCB layouts and thermal dissipation (RθJA = 67.7°C/W, RθJB = 40.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output-enable inputs - Control respective 4-bit buffer groups; must be pulled high via resistor during power-up to avoid bus contention. |
| 2, 4, 6, 8, 11, 13, 15, 17 | 1A1–1A4, 2A1–2A4 | Buffer input terminals - Accept TTL-compatible signals; not overvoltage tolerant beyond VCC + 0.5 V. |
| 3, 5, 7, 9, 12, 14, 16, 18 | 2Y4–2Y1, 1Y4–1Y1 | Non-inverting buffered outputs - Drive buses or LEDs; support 24-mA sink/source with defined VOL/VOH under load. |
| 10 | GND | Digital ground reference - Must be connected to low-impedance system ground plane; decoupling capacitor required adjacent to pin. |
| 20 | VCC | Power supply input - Requires local 0.1-µF ceramic bypass capacitor; multiple VCC pins not present (single-supply design). |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Output Control | Independent active-low OE pins per 4-bit group enable precise bus arbitration and eliminate need for external direction logic. |
| TTL-Compatible Inputs | VIH ≥ 2.0 V and VIL ≤ 0.8 V at 5 V VCC ensure seamless integration with legacy 5-V microcontrollers and FPGAs. |
| High-Drive Outputs | ±24 mA per Y output supports direct LED segment driving (with 1-kΩ series resistor) and fan-out to multiple TTL loads. |
| Low Propagation Delay | 9.5 ns max tpd allows use in 5-V systems requiring sub-10-ns timing margins, such as memory address latching and clock forwarding. |
| VQFN Thermal Performance | RθJB = 40.4°C/W enables sustained operation at full drive in compact industrial enclosures without forced airflow. |
Applications
| LED Display Driver | Telecom Switching Network |
|---|---|
|
Use Scenario: Driving 7-segment or dot-matrix LED displays in industrial HMIs and network equipment front panels. IC Role / Device Role: Non-inverting 3-state buffer providing current-sinking capability to LED cathodes while enabling multiplexed digit scanning. Use Value: Eliminates need for discrete transistors or dedicated LED drivers; 24-mA per channel ensures bright, uniform segment illumination at 5 V. |
Use Scenario: Isolating and buffering control signals between line cards and backplane management ASICs in modular telecom switches. IC Role / Device Role: Bidirectional bus interface element managing shared configuration and status lines across hot-swappable modules. Use Value: High-impedance state prevents signal contention during card insertion/removal; fast tpd maintains timing integrity in 100-MHz control buses. |
| Memory Address Buffer | Industrial Clock Distribution |
|
Use Scenario: Strengthening and isolating address bus signals between microcontroller and parallel NOR flash or SRAM in ruggedized controllers. IC Role / Device Role: Octal non-inverting driver replicating address bits with low skew and high noise margin. Use Value: 4.5–5.5 V operation matches wide-input power rails; ±24 mA drive compensates for PCB trace capacitance up to 150 pF. |
Use Scenario: Distributing system clock or reset signals to multiple peripherals (ADCs, DACs, sensors) in factory automation PLCs. IC Role / Device Role: Low-skew clock buffer with 3-state enable for dynamic clock gating and test-mode isolation. Use Value: 9.5 ns max tpd ensures <100 ps inter-channel skew; TTL-compatible inputs accept oscillator outputs directly without conditioning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244A | Lower VCC range (1.65–3.6 V); 24-mA drive only at 3.3 V; no 5-V tolerance on inputs. | Suitable for 3.3-V-only systems; incompatible with 5-V TTL interfaces without level translation. | Select when migrating to lower-voltage logic; verify input voltage compatibility before substitution. |
| 74ACT244 (NXP, ON Semi) | Functionally identical pinout and AC/DC specs; minor differences in thermal resistance and ESD rating (HBM ±2000 V vs TI's ±3000 V). | Drop-in replacement in most 5-V industrial designs; requires validation of thermal performance in high-power-density layouts. | Valid alternative for cost-sensitive or multi-source procurement; confirm MSL rating and RoHS compliance match. |
Compared with SN74LVC244A, SN74ACT2441PQ provides native 5-V operation and TTL compatibility essential for legacy systems; compared with generic 74ACT244, it offers superior HBM ESD robustness and optimized VQFN thermal metrics for space-constrained industrial deployments.
Availability
SN74ACT2441PQ is available at Aetrix Electronics and suitable for industrial control panels, telecom infrastructure hardware, and LED display subsystems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for SN74ACT2441PQ 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 industry-standard logic families including 74ACT, 74LVC, and 74AUP.
The SN74ACT2441PQ belongs to TI's Advanced CMOS (ACT) logic portfolio, engineered for high-speed, high-drive 5-V digital interfacing in industrial, telecom, and instrumentation applications where reliability and compatibility outweigh ultra-low power requirements.
FAQ
What is the maximum operating temperature for SN74ACT2441PQ?
The SN74ACT2441PQ is rated for industrial temperature operation from –40°C to +85°C. This range is validated per TI's production testing and applies to all package variants including the RKS VQFN. Operation outside this range may result in parametric shift or functional failure, and is not supported by TI's datasheet specifications.
Does SN74ACT2441PQ support 3.3-V input logic levels?
No. The SN74ACT2441PQ requires VCC = 4.5–5.5 V and has TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V at 5 V). While 3.3-V logic may meet VIH minimum in some cases, it violates the recommended operating conditions and risks marginal switching behavior. For 3.3-V systems, SN74LVC244A is the appropriate alternative.
Can SN74ACT2441PQ drive LEDs directly?
Yes. Each output of SN74ACT2441PQ can source or sink up to 24 mA continuously. When driving LEDs, use a series current-limiting resistor calculated as R = (VCC − VLED) / ILED. At 5 V and 20 mA, a 150 Ω resistor is typical. Do not exceed 24 mA per output or 200 mA total device current.
What is the purpose of the exposed thermal pad on SN74ACT2441PQ?
The exposed thermal pad on the SN74ACT2441PQ (RKS package) must be soldered to a PCB copper pour to achieve specified thermal performance. It reduces junction-to-board thermal resistance to 40.4°C/W, enabling reliable operation at full output drive. Leaving it unconnected degrades thermal performance by >30% and risks thermal shutdown or accelerated aging.
How should unused inputs be handled on SN74ACT2441PQ?
All unused inputs on SN74ACT2441PQ must be tied to either VCC or GND-never left floating. Floating inputs cause increased ICC, unpredictable output states, and potential oscillation. Tie unused A inputs to GND (for low state) or VCC (for high state); tie unused OE inputs to VCC to keep associated outputs enabled, or to GND to disable them permanently.
SN74ACT2441PQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74ACT2441PQ FAQ
1.How can I place an order for SN74ACT2441PQ through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ACT2441PQ 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 SN74ACT2441PQ reliable?
The price and inventory of SN74ACT2441PQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT2441PQ is usually 5 days.
3.What payment methods are accepted for SN74ACT2441PQ?
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4.How is shipping managed for SN74ACT2441PQ?
SN74ACT2441PQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ACT2441PQ 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 SN74ACT2441PQ?
For technical support, including SN74ACT2441PQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT2441PQ requirements.
6.How does Aetrix verify that SN74ACT2441PQ is sourced from the original manufacturer or authorized distributors?
All SN74ACT2441PQ 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 SN74ACT2441PQ meets industry standards.
7.What is the process for return or replacement of SN74ACT2441PQ?
All SN74ACT2441PQ units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT2441PQ, 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 SN74ACT2441PQ part is unused and in its original packaging.
Return procedure for SN74ACT2441PQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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