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Texas Instruments SN74ABT541N
- Part No.:
- SN74ABT541N
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74ABT541N.pdf
- Description:
- BUS DRIVER, ABT SERIES, 8-BIT
- Quantity:
- Payment:
- Shipping:
Inventory:630
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Product details
Overview
SN74ABT541N from Texas Instruments is an octal noninverting buffer/driver with 3-state outputs, designed for bus line driving and memory address register buffering in 5-V TTL-compatible systems. It features dual active-low output-enable inputs (OE1\, OE2\), high-drive capability (–32 mA IOH, 64 mA IOL), EPIC-II™B BiCMOS architecture, and guaranteed high-impedance state during power-up/down (VCC = 0–2.1 V).
For engineers reviewing the SN74ABT541N datasheet, SN74ABT541N pinout, SN74ABT541N application, or SN74ABT541N equivalent, key selection considerations include its 20-pin PDIP (N) package, –40°C to 85°C industrial temperature range, 3.2 ns typical propagation delay (tPHL/tPLH), latch-up immunity >500 mA per JESD-17, and compatibility with legacy TTL bus architectures requiring robust drive strength and controlled output enable sequencing.
Technical Context
The SN74ABT541N implements a dual-input AND gate logic for 3-state control, where either OE1\ or OE2\ asserted high forces all eight Y outputs into high-impedance. Its BiCMOS design combines bipolar input stages for TTL-level compatibility and CMOS output stages for low static current and high sink/source drive.
Propagation delays are tightly specified (tPLH/tPHL ≤ 3.9 ns at VCC = 5 V, CL = 50 pF), and output ground bounce (VOLP) remains <1 V at TA = 25°C. The device enters high-Z automatically below 2.1 V VCC, but above that threshold requires OE\ pulled to VCC via external resistor to guarantee disable behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across standard 5-V rail tolerances. |
| Output Drive | –32 mA IOH / 64 mA IOL - Supports heavy capacitive bus loading and fast edge rates without external buffers. |
| Propagation Delay | ≤3.9 ns (max) - Enables reliable timing in high-speed address/data buses up to ~250 MHz effective toggle rate. |
| Input Compatibility | TTL-level - Directly interfaces with legacy 74LS/74F logic without level-shifting. |
| Power-Up Behavior | High-Z below 2.1 V VCC - Prevents bus contention during supply ramp-up or brownout conditions. |
| Latch-Up Immunity | >500 mA per JESD-17 - Meets stringent reliability requirements for industrial and telecom backplanes. |
| Operating Temperature | –40°C to +85°C - Qualified for extended industrial environments without derating. |
Pinout & Package
SN74ABT541N uses a 20-pin plastic dual in-line package (PDIP-N), with inputs (A1–A8) on one side and outputs (Y1–Y8) on the opposite side to simplify PCB routing and reduce crosstalk. Power (VCC) and ground (GND) are positioned diagonally for optimal decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1\, OE2\ | Active-low 3-state enable inputs - AND logic: either high disables all outputs. |
| 2–9 | A1–A8 | Noninverting data inputs - Accept TTL-level signals; internally buffered for noise immunity. |
| 11–18 | Y1–Y8 | 3-state noninverting outputs - High-drive, bus-capable, with controlled VOLP and fast transition times. |
| 10 | GND | Ground reference - Dedicated pin for low-inductance return path to minimize switching noise. |
| 20 | VCC | Positive supply - Must be decoupled locally; powers both input and output stages. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-II™B BiCMOS process | Reduces static current vs. pure bipolar while retaining TTL input thresholds and high drive strength. |
| Power-up/power-down high-Z | Eliminates bus conflicts during system reset or hot-swap events without external circuitry. |
| High-output drive (–32/64 mA) | Drives 50-pF loads with <4 ns transitions, supporting longer traces or multiple loads per line. |
| Low output ground bounce (<1 V) | Minimizes simultaneous switching noise (SSN), critical for mixed-signal board integrity. |
| JEDEC JESD-17 latch-up immunity | Withstands >500 mA transient faults - suitable for ruggedized industrial backplane applications. |
Applications
| Memory Address Buffering | Parallel Bus Driver |
|---|---|
Use Scenario: Isolating and strengthening CPU address lines before connecting to multiple SRAM or ROM chips on a shared memory bus. IC Role / Device Role / Timing Role: Noninverting octal buffer providing fan-out gain and drive strength while maintaining signal integrity and timing alignment across all 8 bits. Use Value: Eliminates address skew and ensures setup/hold margins are met even with 10+ cm trace lengths and 3–5 downstream devices per line. |
Use Scenario: Driving bidirectional data/control lines between microcontroller peripherals and FPGA-based I/O expanders in industrial PLC modules. IC Role / Device Role / Timing Role: 3-state bus transceiver enabling controlled directionality and contention-free arbitration on shared parallel interfaces. Use Value: Dual OE\ inputs allow independent enable control for read/write phases, reducing external logic and simplifying state-machine sequencing. |
| Legacy System Interface | Backplane Signal Conditioning |
Use Scenario: Interfacing modern MCU GPIOs to legacy ISA or VMEbus peripherals requiring TTL-compatible voltage levels and higher current sourcing. IC Role / Device Role / Timing Role: Level-translation and drive-boosting buffer ensuring full TTL VOH/VOL compliance under load. Use Value: Maintains signal fidelity across noisy backplane environments where 74LS drivers would fail to meet VIH/VIL margins. |
Use Scenario: Strengthening clock or strobe signals distributed across multi-slot backplanes in test equipment or modular instrumentation racks. IC Role / Device Role / Timing Role: Low-skew (tsk(o) ≤ 0.5 ns), high-drive repeater minimizing jitter accumulation and edge degradation over long traces. Use Value: Preserves timing margins for synchronous handshaking protocols by limiting propagation delay variation across all 8 channels. |
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 |
|---|---|---|---|
| SN74ABT244N | Two 4-bit sections instead of single 8-bit section; identical drive, timing, and voltage specs. | Offers independent enable control per 4-bit group - better suited for split-bus or partial-width enable schemes. | Select when separate control of upper/lower nibbles is required; pinout differs - PCB redesign needed. |
| SN74LVC244APW | 3.3-V only (1.65–3.6 V), lower drive (–24/24 mA), CMOS input thresholds. | Not TTL-compatible; requires level-shifting for 5-V systems; optimized for low-voltage portable designs. | Choose only for new 3.3-V designs; not a drop-in replacement for SN74ABT541N in 5-V environments. |
Compared with SN74ABT244N and SN74LVC244APW, the SN74ABT541N provides unified 8-bit control and native 5-V TTL interoperability - making it the preferred choice for retrofitting or maintaining legacy industrial controllers where bus timing, drive strength, and voltage compatibility are non-negotiable.
Availability
SN74ABT541N is available at Aetrix Electronics and suitable for industrial control systems, legacy test equipment upgrades, and embedded memory subsystems requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT541N 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 standard logic innovation.
The SN74ABT541N belongs to TI's ABT advanced BiCMOS logic family, engineered specifically for high-speed, high-drive 5-V bus interface applications demanding low power, robust latch-up immunity, and seamless TTL compatibility.
FAQ
What is the operating temperature range for the SN74ABT541N?
The SN74ABT541N is characterized for industrial operation from –40°C to +85°C. This range is validated per manufacturer specifications and supports deployment in factory automation, motor drives, and outdoor-rated instrumentation without thermal derating.
Does the SN74ABT541N require external pull-up resistors on OE\ pins?
Yes - to ensure reliable high-impedance state when VCC exceeds 2.1 V, OE1\ and OE2\ must be tied to VCC through external pull-up resistors. The minimum resistance value depends on the driver's current-sinking capability, as specified in the SN74ABT541N datasheet.
Can the SN74ABT541N be used in place of older 74LS244 devices?
Yes - the SN74ABT541N is pin-compatible with the 74LS244 in the 20-pin PDIP (N) package and offers superior performance: higher drive (–32/64 mA vs. –15/24 mA), faster propagation (<3.9 ns vs. ~20 ns), and built-in power-up high-Z behavior not present in LS logic.
What is the maximum capacitive load the SN74ABT541N can drive reliably?
The SN74ABT541N is tested and specified for CL = 50 pF, with guaranteed tPLH/tPHL ≤ 3.9 ns. While it can drive heavier loads, timing margins degrade linearly beyond this; for >50 pF, layout optimization and/or series termination is recommended to maintain signal integrity.
Is the SN74ABT541N RoHS compliant?
Yes - the SN74ABT541N is manufactured in RoHS-compliant facilities and meets lead-free soldering requirements. Its PDIP-N package uses matte tin lead finish, fully compliant with EU Directive 2011/65/EU and JEDEC J-STD-020.
SN74ABT541N 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:
- -
SN74ABT541N FAQ
1.How can I place an order for SN74ABT541N through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT541N 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 SN74ABT541N reliable?
The price and inventory of SN74ABT541N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT541N is usually 5 days.
3.What payment methods are accepted for SN74ABT541N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT541N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT541N?
SN74ABT541N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT541N 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 SN74ABT541N?
For technical support, including SN74ABT541N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT541N requirements.
6.How does Aetrix verify that SN74ABT541N is sourced from the original manufacturer or authorized distributors?
All SN74ABT541N 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 SN74ABT541N meets industry standards.
7.What is the process for return or replacement of SN74ABT541N?
All SN74ABT541N units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT541N, 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 SN74ABT541N part is unused and in its original packaging.
Return procedure for SN74ABT541N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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