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Texas Instruments SN74ACT241DWR
- Part No.:
- SN74ACT241DWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ACT241DWR.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,018
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Product details
Overview
SN74ACT241DWR from Texas Instruments is an octal 3-state buffer/driver IC designed for memory address, clock, and bus interface applications. It operates at 4.5V–5.5V VCC, supports TTL-compatible inputs up to 5.5V, delivers ≤8.5ns propagation delay at 5V, and features dual independent output-enable controls (1OE, 2OE) for flexible bus management in industrial and embedded systems.
For engineers reviewing the SN74ACT241DWR datasheet, SN74ACT241DWR pinout, SN74ACT241DWR application, or SN74ACT241DWR equivalent, this page provides verified functional modes, SOIC-20 package dimensions, switching characteristics, thermal resistance (RθJA = 58°C/W), and real-world implementation guidance for bus isolation and signal conditioning.
Technical Context
The SN74ACT241DWR implements two independent 4-bit noninverting buffer sections, each with complementary 3-state control: 1OE enables Y1–Y4 when low; 2OE enables Y1–Y4 when high. Its ACT logic family ensures TTL-level input compatibility and CMOS-level output drive strength (±24mA), enabling direct interfacing between legacy TTL and modern 5V CMOS systems without level-shifting.
Each buffer exhibits matched tPLH/tPHL (1.5–9.5ns) and fast 3-state transition times (tPZH/tPZL ≤10.5ns), supporting reliable high-speed bus arbitration. The device maintains stable operation across –40°C to +85°C ambient temperature and includes internal ESD protection per JEDEC JS-001.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - Ensures robust operation across standard 5V supply tolerances and brown-out conditions. |
| Max Propagation Delay | 8.5ns at 5V - Enables reliable timing in 100+ MHz bus clock domains with margin. |
| Output Drive Strength | ±24mA - Sinks/supplies sufficient current to drive 50pF loads with <10ns edges and minimal overshoot. |
| Input Voltage Tolerance | 0V to VCC+0.5V - Accepts 5.5V-tolerant inputs while powered from 5V, simplifying mixed-voltage interconnects. |
| 3-State Leakage Current | ±2.5µA at 5.5V - Minimizes bus leakage during high-impedance state, critical for multi-drop bus integrity. |
| Power Dissipation Capacitance | 45pF per buffer - Predicts dynamic power consumption (P = C·V²·f) for thermal budgeting in dense PCB layouts. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded control and instrumentation environments. |
Pinout & Package
SN74ACT241DWR uses a 20-pin SOIC (DW) package measuring 12.8mm × 10.3mm (body: 12.8mm × 7.5mm), 2.65mm max height, with 1.27mm pitch and RoHS-compliant NiPdAu lead finish. MSL Level-1 rating supports uncompromised reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Active-low enable for Y1–Y4 | Drives outputs low when asserted; ties to VCC via pull-up for power-up high-Z safety. |
| 2OE | Active-high enable for Y1–Y4 | Drives outputs high when asserted; ties to GND via pull-down for power-down high-Z safety. |
| 1A1–1A4, 2A1–2A4 | Buffer input terminals | Accept TTL/CMOS logic levels; internally clamped to prevent latch-up under overvoltage. |
| 1Y1–1Y4, 2Y1–2Y4 | Noninverting 3-state outputs | Drive bidirectional buses; high-Z state isolates downstream loads during contention or idle periods. |
| VCC (Pin 20) | Positive supply | Requires local 0.1µF ceramic bypass capacitor to suppress switching noise and maintain rail stability. |
| GND (Pin 10) | Reference ground | Must connect to low-impedance system ground plane to minimize ground bounce during simultaneous switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit buffers | Enables selective activation of two separate 4-bit data paths using distinct OE controls-ideal for multiplexed address/data buses. |
| TTL-compatible inputs | Accepts 0.8V/2.0V logic thresholds at 5V VCC, ensuring interoperability with legacy 74LS and 74F families without external translators. |
| Low propagation delay variation | tPLH/tPHL matching ≤1ns across channels reduces skew in parallel bus timing budgets. |
| High noise immunity | Input hysteresis and 8ns/V minimum input transition rate tolerance suppress false triggering from slow-rising signals or EMI. |
| Robust ESD protection | Withstands ±2kV HBM per JESD22-A114, reducing field failure risk in handling and board-level integration. |
Applications
| Memory Address Buffering | System Clock Distribution |
|---|---|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or flash devices on a shared bus. IC Role / Device Role / Timing Role: SN74ACT241DWR acts as a fanout buffer, isolating MCU pins from capacitive loading and enabling concurrent access to multiple memory chips. Use Value: Prevents address skew and timing violations by delivering matched 8.5ns delays across all 8 outputs, maintaining setup/hold margins at 20MHz bus speeds. |
Use Scenario: Distributing a single system clock to multiple peripherals (ADC, DAC, UART) requiring synchronized sampling. IC Role / Device Role / Timing Role: SN74ACT241DWR serves as a low-skew clock driver with 3-state capability for dynamic clock gating. Use Value: Delivers sub-1ns channel-to-channel skew and ±24mA drive to meet 50pF load requirements per clock receiver, eliminating need for discrete transistor buffers. |
| Industrial Bus Transceiver Interface | Legacy System Signal Conditioning |
Use Scenario: Interfacing a modern 5V FPGA I/O bank to a legacy RS-485 transceiver with asymmetric voltage thresholds. IC Role / Device Role / Timing Role: SN74ACT241DWR provides level-adapted, 3-state-controlled signal translation between FPGA and transceiver enable lines. Use Value: TTL-compatible inputs accept FPGA's 3.3V LVTTL outputs directly; 5V CMOS outputs reliably assert RS-485 DE/RE pins without external pull-ups or voltage dividers. |
Use Scenario: Upgrading aging industrial PLC backplane logic from 74LS241 to reduce power and improve noise margin. IC Role / Device Role / Timing Role: SN74ACT241DWR replaces obsolete LS-series buffers while retaining identical pinout and function. Use Value: Cuts quiescent current from ~30mA to <80µA and improves noise immunity (VIH = 2.0V vs LS's 2.0V, but with higher hysteresis), extending mean time between failures in electrically noisy factory floors. |
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 |
|---|---|---|---|
| SN74HCT241N | CMOS input thresholds (VIH = 2.0V min, VIL = 0.8V max); lower ICC (4µA typ) but slower tpd (17ns max). | Better suited for 3.3V/5V mixed-signal systems where input voltage tolerance is less critical than ultra-low static power. | Select SN74HCT241N only if system timing budget allows >17ns delay and input sources are strictly 5V CMOS. |
| 74ACT244SCX | Identical ACT logic family, same 8.5ns tpd, but features non-inverting outputs only (no complementary OE) and different pin mapping (20-pin SOIC, but OE on Pin 1/19). | Applicable where unidirectional buffering suffices and PCB layout permits pinout adaptation. | Choose 74ACT244SCX only if dual OE control is unnecessary and board redesign accommodates relocated enable pins. |
Compared with SN74HCT241N and 74ACT244SCX, SN74ACT241DWR uniquely combines TTL-compatible inputs, dual complementary OE control, and 8.5ns speed-making it the only option for legacy bus arbitration requiring simultaneous 3-state control of two independent 4-bit groups without layout changes.
Availability
SN74ACT241DWR is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded control systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for SN74ACT241DWR 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.
The SN74ACT241DWR belongs to TI's advanced CMOS (ACT) logic portfolio, engineered for high-speed, low-noise bus interfacing in industrial, automotive, and communications infrastructure applications where reliability and timing precision are critical.
FAQ
What is the maximum operating temperature range for SN74ACT241DWR?
The SN74ACT241DWR is rated for operation from –40°C to +85°C ambient temperature, meeting industrial-grade environmental requirements. This range is validated per TI's recommended operating conditions and supported by thermal metrics including RθJA = 58°C/W for the SOIC-20 (DW) package. Operation outside this range may compromise timing accuracy or reliability.
Does SN74ACT241DWR support 3.3V input logic levels?
Yes, SN74ACT241DWR accepts 3.3V logic inputs reliably: its TTL-compatible input thresholds (VIL ≤ 0.8V, VIH ≥ 2.0V) are fully satisfied by 3.3V CMOS outputs. However, the device must be powered from 4.5V–5.5V VCC; it does not operate from 3.3V supply. Inputs exceeding VCC are tolerated up to VCC+0.5V.
How should unused inputs be handled on SN74ACT241DWR?
All unused inputs on SN74ACT241DWR must be tied to either VCC or GND to prevent floating states that cause excessive ICC, oscillation, or ESD susceptibility. For example, tie unused 1A/2A inputs to GND to force corresponding Y outputs low when enabled, or to VCC to force high. Never leave inputs unconnected.
What is the recommended bypass capacitor for SN74ACT241DWR?
Texas Instruments recommends a 0.1µF ceramic capacitor placed as close as possible to the VCC (Pin 20) and GND (Pin 10) pins of SN74ACT241DWR. This minimizes high-frequency supply noise and prevents ground bounce during simultaneous output switching. For boards with multiple VCC pins, use one 0.1µF cap per pin.
Is SN74ACT241DWR pin-compatible with SN74LS241?
No, SN74ACT241DWR is not pin-compatible with SN74LS241. While both are octal 3-state buffers, SN74LS241 uses a different pinout (e.g., OE on Pin 1 and 19, outputs on Pins 2–5/15–18), whereas SN74ACT241DWR places 1OE on Pin 1, 2OE on Pin 19, and interleaves inputs/outputs. Direct replacement requires PCB redesign.
SN74ACT241DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 20-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:
- 20-SOIC
SN74ACT241DWR FAQ
1.How can I place an order for SN74ACT241DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ACT241DWR 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 SN74ACT241DWR reliable?
The price and inventory of SN74ACT241DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT241DWR is usually 5 days.
3.What payment methods are accepted for SN74ACT241DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ACT241DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ACT241DWR?
SN74ACT241DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ACT241DWR 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 SN74ACT241DWR?
For technical support, including SN74ACT241DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT241DWR requirements.
6.How does Aetrix verify that SN74ACT241DWR is sourced from the original manufacturer or authorized distributors?
All SN74ACT241DWR 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 SN74ACT241DWR meets industry standards.
7.What is the process for return or replacement of SN74ACT241DWR?
All SN74ACT241DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT241DWR, 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 SN74ACT241DWR part is unused and in its original packaging.
Return procedure for SN74ACT241DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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