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Texas Instruments SN74ABT541BDW
- Part No.:
- SN74ABT541BDW
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT541BDW.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,848
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Product details
Overview
SN74ABT541BDW from Texas Instruments is an octal buffer/driver with 3-state outputs in a 20-pin SOIC (DW) package, operating from 4.5 V to 5.5 V, delivering ±32 mA high-drive capability and featuring dual active-low output-enable inputs (OE1/OE2). It is designed for bus line driving and memory address register buffering in industrial control and data acquisition systems.
For engineers reviewing the SN74ABT541BDW datasheet, SN74ABT541BDW pinout, SN74ABT541BDW application, or SN74ABT541BDW equivalent, key selection criteria include its 3-state control logic, high-current drive strength, power-up high-impedance behavior, and SOIC-DW thermal performance (θJA = 97 °C/W).
Technical Context
The SN74ABT541BDW implements an EPIC-IIB™ BiCMOS architecture that reduces power dissipation while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VVIH = 2.0 V) and fast switching (tPLH/tPHL ≤ 3.9 ns at VCC = 5 V, CL = 50 pF). Its dual OE inputs form a two-input AND gate with active-low logic: either OE1 or OE2 high forces all eight Y outputs into high-impedance state.
During power-up/down, the device enters high-impedance when VCC is between 0 and 2.1 V. For guaranteed high-Z above 2.1 V, OE pins must be pulled up to VCC via external resistors-minimum value determined by driver sink capability. Latch-up immunity exceeds 500 mA per JEDEC JESD-17.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL/CMOS systems and stable operation across supply variation. |
| IOH/IOL | –32 mA / 64 mA - Enables direct driving of heavy capacitive loads or multiple TTL inputs without external buffers. |
| tPLH/tPHL | ≤ 3.9 ns - Supports high-speed data transfer on address/data buses up to ~250 MHz toggle rate. |
| θJA | 97 °C/W - Defines thermal limit for SOIC-DW package; requires ≤ 150 mW power dissipation for <15 °C rise above ambient. |
| Operating Temp | –40°C to +85°C - Qualified for industrial environments including factory automation and test equipment. |
| Input Clamp Current | –18 mA - Protects against negative transients down to –0.5 V, supporting robust I/O handling in noisy systems. |
| VOZ Leakage | ±50 µA (power-up/down) - Minimizes unintended current flow during sequencing, critical for hot-swap or partial-power designs. |
Pinout & Package
SN74ABT541BDW uses a 20-pin SOIC (DW) package with 7.5 mm × 12.8 mm body, 1.27 mm lead pitch, and 2.65 mm max height. Pin 1 index area located at top-left corner with beveled edge marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE1 | Active-low output enable 1 - Combined with OE2 in AND logic; high disables all Y outputs. |
| 2 | OE2 | Active-low output enable 2 - Dual-control redundancy improves system-level fault tolerance. |
| 3–10 | Y1–Y8 | 3-state buffered outputs - Drive bidirectional bus lines; high-Z state prevents contention during arbitration. |
| 11–18 | A1–A8 | Noninverting inputs - Accept TTL/CMOS logic levels; placed opposite Y pins to simplify PCB routing. |
| 19 | VCC | Positive supply - Must be decoupled locally; supports simultaneous switching of all 8 outputs. |
| 12 | GND | Ground reference - Shared return path; layout must minimize inductance to reduce ground bounce (VOLP < 1 V). |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB™ BiCMOS process | Reduces static power vs. pure bipolar while retaining high drive and speed - enables lower thermal load in dense layouts. |
| High-impedance on power-up/down | Automatic Z-state activation below 2.1 V VCC - eliminates bus contention during cold start or brownout recovery. |
| Output ground bounce (VOLP) | < 1 V at VCC = 5 V - ensures signal integrity during simultaneous switching of multiple outputs. |
| Latch-up immunity | > 500 mA per JEDEC JESD-17 - guarantees robustness against ESD-induced latch-up in industrial settings. |
| Input/output voltage tolerance | –0.5 V to 7 V - allows safe interfacing with mixed-voltage subsystems and transient overvoltage resilience. |
Applications
| Industrial PLC Backplane Interface | Memory Address Buffering |
|---|---|
|
Use Scenario: Isolating CPU address bus from modular I/O expansion slots in programmable logic controllers. IC Role / Device Role / Timing Role: Noninverting octal buffer with 3-state control synchronizing slot access under FPGA/CPU arbitration. Use Value: Prevents bus contention during hot-swap insertion; ±64 mA drive sustains signal integrity across 15 cm backplane traces. |
Use Scenario: Driving 8-bit address lines from microcontroller to parallel EEPROM or SRAM in embedded instrumentation. IC Role / Device Role / Timing Role: Low-propagation-delay buffer (tPHL ≤ 3.9 ns) ensuring setup/hold timing margins at 20 MHz clock rates. Use Value: Eliminates need for discrete pull-ups; high drive strength maintains VIH/VIL thresholds despite trace capacitance. |
| Test Equipment Signal Routing | Digital I/O Expansion Module |
|
Use Scenario: Multiplexing digital stimulus signals between DUT interface and pattern generator in ATE systems. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling shared resource access via OE-controlled 3-state isolation. Use Value: Dual OE inputs allow independent channel gating; low ground bounce preserves measurement accuracy during switching. |
Use Scenario: Expanding GPIO count on ARM-based controller boards using parallel I/O expansion over ribbon cable. IC Role / Device Role / Timing Role: Level-shifting buffer translating 3.3 V MCU outputs to 5 V peripheral logic while providing drive margin. Use Value: Input clamp current rating (–18 mA) protects against cable-induced transients; SOIC-DW footprint fits compact carrier boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT244N | Octal buffer with separate A/B-side enables (no dual-OE AND logic); identical SOIC-N package but larger footprint (6.35 mm width vs. DW's 3.9 mm). | Preferred where independent control of input and output groups is required, e.g., bidirectional data transfer with direction latching. | Select SN74ABT244N only if dual independent enables are needed; SN74ABT541BDW offers tighter layout and unified disable logic. |
| SN74LVC244APWR | 3.3 V-only operation (1.65–3.6 V), lower drive (±24 mA), smaller TSSOP-20 package (4.4 mm width), and higher speed (tPD ≤ 3.5 ns). | Suitable for modern low-voltage systems; not interoperable with 5 V buses without level translation. | Choose SN74LVC244APWR for 3.3 V domains requiring space savings; SN74ABT541BDW remains optimal for legacy 5 V industrial interfaces. |
Compared with SN74ABT244N and SN74LVC244APWR, SN74ABT541BDW uniquely combines 5 V bus compatibility, dual-OE safety logic, and SOIC-DW thermal efficiency-making it the preferred choice for retrofitting or upgrading existing 5 V industrial backplanes.
Availability
SN74ABT541BDW is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, memory address buffering, test equipment signal routing, and digital I/O expansion modules requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT541BDW 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 50 years of innovation in industrial-grade interface ICs.
The SN74ABT541BDW belongs to TI's ABT logic family, engineered for high-noise-immunity 5 V bus interfacing in harsh industrial environments where reliability, drive strength, and power sequencing behavior are critical.
FAQ
What is the recommended pull-up resistor value for OE pins on SN74ABT541BDW?
The minimum pull-up resistor value for OE pins on SN74ABT541BDW depends on the current-sinking capability of the driving source. TI specifies that OE must be tied to VCC through a pullup resistor to guarantee high-impedance state above 2.1 V. For typical 5 V systems with standard logic drivers, a 10 kΩ resistor is commonly used and verified in application notes. Always verify with actual driver sink current specs in your design.
Does SN74ABT541BDW support hot-swap operation?
Yes, SN74ABT541BDW supports hot-swap operation due to its inherent power-up/power-down high-impedance behavior below 2.1 V VCC. This prevents bus contention during insertion. However, full hot-swap robustness also requires external circuitry (e.g., current-limiting FETs, slew-rate controlled supplies) - SN74ABT541BDW alone meets the electrical precondition but not full system-level hot-swap certification.
Can SN74ABT541BDW drive a 50-pF load at 20 MHz?
Yes, SN74ABT541BDW is characterized for CL = 50 pF and delivers tPLH/tPHL ≤ 3.9 ns at 5 V, supporting reliable operation up to ~250 MHz toggle frequency. At 20 MHz, propagation delay margin is ample, and its ±64 mA IOL ensures fast edge rates even with trace and load capacitance - confirmed in TI's switching characteristics tables.
Is SN74ABT541BDW pin-compatible with SN74ABT541BN?
No, SN74ABT541BDW is not pin-compatible with SN74ABT541BN. Both are 20-pin devices but use different packages: SN74ABT541BDW is in SOIC-DW (7.5 mm × 12.8 mm, 1.27 mm pitch), while SN74ABT541BN uses PDIP-N (6.35 mm × 24.13 mm, 2.54 mm pitch). Footprint, thermal profile, and mounting method differ significantly - PCB redesign is required for substitution.
What is the maximum allowable output short-circuit duration for SN74ABT541BDW?
TI does not specify a maximum safe short-circuit duration for SN74ABT541BDW. Absolute maximum ratings list IO = 128 mA for SN74ABT541B outputs, but continuous short-circuit operation risks thermal runaway. The device lacks internal current limiting - external protection (e.g., polyfuse, series resistor) is mandatory for sustained fault conditions. Refer to TI's SCBS093L datasheet Section 6.1 for derating guidance.
SN74ABT541BDW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74ABT541BDW FAQ
1.How can I place an order for SN74ABT541BDW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT541BDW 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 SN74ABT541BDW reliable?
The price and inventory of SN74ABT541BDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT541BDW is usually 5 days.
3.What payment methods are accepted for SN74ABT541BDW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT541BDW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT541BDW?
SN74ABT541BDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT541BDW 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 SN74ABT541BDW?
For technical support, including SN74ABT541BDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT541BDW requirements.
6.How does Aetrix verify that SN74ABT541BDW is sourced from the original manufacturer or authorized distributors?
All SN74ABT541BDW 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 SN74ABT541BDW meets industry standards.
7.What is the process for return or replacement of SN74ABT541BDW?
All SN74ABT541BDW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT541BDW, 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 SN74ABT541BDW part is unused and in its original packaging.
Return procedure for SN74ABT541BDW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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