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Texas Instruments SN74ABT541BNS
- Part No.:
- SN74ABT541BNS
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74ABT541BNS.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,513
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Product details
Overview
SN74ABT541BNS from Texas Instruments is an octal 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), and operates across –40°C to 85°C. Its NS package (20-pin SOP) supports compact PCB layout with inputs and outputs on opposite sides.
For engineers reviewing the SN74ABT541BNS datasheet, SN74ABT541BNS pinout, SN74ABT541BNS application, or SN74ABT541BNS equivalent, key selection criteria include 3-state control logic, output drive strength, propagation delay (tPLH/tPHL ≤ 3.9 ns at VCC = 5 V), power-up high-impedance behavior, and compatibility with legacy TTL bus architectures.
Technical Context
The SN74ABT541BNS implements a dual-gated 3-state control architecture: both OE1 and OE2 must be low for outputs to follow inputs; either OE high forces all eight Y outputs into high-impedance. Its EPIC-IIB™ BiCMOS process enables low power dissipation while maintaining TTL-level input thresholds (VIH = 2 V, VIL = 0.8 V) and robust latch-up immunity (>500 mA per JESD-17).
During power-up/down, the device enters high-impedance state when VCC is between 0 and 2.1 V. For reliable disable above 2.1 V, OE pins require pullup resistors-minimum value determined by driver sink capability. Input and output capacitances are specified at Ci = 3 pF and Co = 6 pF, supporting stable operation with 50-pF load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and CMOS logic rails without level-shifting. |
| IOH / IOL | –32 mA / 64 mA - Delivers sufficient current to drive multiple TTL loads or terminate stubs on parallel buses. |
| tPLH / tPHL | ≤ 3.9 ns (max) - Enables reliable operation in high-speed address/data bus applications up to ~200 MHz toggle rate. |
| VIH / VIL | 2.0 V / 0.8 V - Matches standard TTL input thresholds, allowing direct interfacing with legacy 74LS/74F families. |
| IOZPU / IOZPD | ±50 µA - Confirms high-impedance state stability during power sequencing, preventing bus contention at startup/shutdown. |
| Operating Temp | –40°C to +85°C - Qualified for industrial-grade embedded systems including automation controllers and instrumentation. |
Pinout & Package
SN74ABT541BNS is housed in a 20-pin SOP (Small Outline Package) with 0.65 mm lead pitch and 7.5 mm × 12.8 mm body dimensions (JEDEC MO-150 compliant). The package features gull-wing leads, RoHS-compliant NiPdAu plating, and MSL Level-1 rating (unlimited floor life at <30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OE1, OE2 | Active-low 3-state enable inputs; AND logic requires both low for output enable - prevents accidental bus activation. |
| 3–10 | Y1–Y8 | Noninverting buffered outputs; each drives one bus line with ±32/64 mA capability and controlled edge rates. |
| 11, 12 | GND, VCC | Power supply terminals; separate GND/VCC pins reduce ground bounce (VOLP < 1 V) in high-speed switching. |
| 13–20 | A1–A8 | Input buffers for address/data lines; placed opposite outputs to simplify layer routing and minimize crosstalk. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB™ BiCMOS Process | Reduces dynamic power vs. bipolar-only designs while retaining TTL-compatible drive strength and noise margins. |
| Dual 3-State Enable Logic | Prevents partial enable states - eliminates risk of bus contention when only one OE is asserted incorrectly. |
| Power-Up/Down High-Z | Guarantees bus isolation during power ramping (0–2.1 V), eliminating need for external reset sequencing. |
| High-Drive Outputs | Supports fan-out of ≥10 standard TTL loads per output, enabling direct connection to unbuffered backplanes. |
| Input/Output Separation | Opposite-side pin arrangement simplifies PCB trace routing for bidirectional bus topologies and reduces layer count. |
Applications
| Memory Address Buffering | Parallel Bus Driver |
|---|---|
Use Scenario: Driving 8-bit or 16-bit address lines from microcontroller or FPGA to SRAM/ROM chips. IC Role / Device Role / Timing Role: Noninverting buffer isolating address generator from capacitive bus load; ensures setup/hold timing integrity. Use Value: Propagation delay ≤3.9 ns and 64-mA sink capability maintain timing margins across 10-cm traces loaded with 50 pF. |
Use Scenario: Interfacing a microprocessor data bus to peripheral ICs (e.g., ADCs, DACs, UARTs) sharing a common bus. IC Role / Device Role / Timing Role: Bidirectional bus driver with 3-state control enabling multi-master arbitration and hot-swap capability. Use Value: Dual OE inputs allow independent control of two 4-bit segments, supporting interleaved read/write cycles without bus lock. |
| Industrial Control Backplane | TTL-Level Signal Translation |
Use Scenario: Distributing control signals (e.g., chip select, write enable) across modular PLC I/O racks via ribbon cable. IC Role / Device Role / Timing Role: Robust buffer compensating for signal degradation over 30-cm unterminated cables at 10 MHz. Use Value: Latch-up immunity >500 mA and ±100 µA off-state leakage ensure reliability in electrically noisy factory environments. |
Use Scenario: Converting 3.3-V FPGA I/O to 5-V TTL levels for legacy test equipment interfaces. IC Role / Device Role / Timing Role: Level-shifting buffer leveraging TTL-compatible input thresholds (VIL = 0.8 V) and 5-V rail-sourced outputs. Use Value: No external biasing required - direct connection to 3.3-V logic outputs meets VIH minimum with margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT244N | Two 4-bit sections with independent OE controls; identical drive strength and timing but different pinout. | Better suited for split-bus architectures requiring independent enable of high/low nibbles. | Select when needing granular 4-bit control instead of unified 8-bit enable; verify PCB layout compatibility. |
| 74ACT541PC | CMOS-based; lower ICC (250 µA vs. 30 mA), higher VOH (4.4 V), but reduced IOL (24 mA) and no power-up Z-state guarantee. | Preferred in low-power systems where bus loading is light and strict power sequencing is managed externally. | Choose for energy-constrained designs; avoid if bus contention during power transition is unacceptable. |
Compared with SN74ABT541BNS, SN74ABT244N offers finer enable granularity at the cost of non-drop-in replacement, while 74ACT541PC trades drive strength and intrinsic power-up safety for static power reduction - critical for battery-operated or thermally constrained deployments.
Availability
SN74ABT541BNS is available at Aetrix Electronics and suitable for industrial control backplanes, memory subsystems, and parallel interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ABT541BNS 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 and automotive electronics.
The SN74ABT541BNS belongs to TI's ABT logic family, engineered for high-speed, high-drive 5-V TTL-compatible bus interfacing in mission-critical industrial and communications infrastructure.
FAQ
What is the function of OE1 and OE2 on the SN74ABT541BNS?
The SN74ABT541BNS uses dual active-low output-enable inputs OE1 and OE2 connected via internal AND logic. Both must be low for Y1–Y8 to follow A1–A8; if either is high, all outputs enter high-impedance. This design prevents partial enable states and enhances system-level fault tolerance in shared-bus environments.
Does the SN74ABT541BNS support hot insertion or live bus swapping?
Yes - the SN74ABT541BNS guarantees high-impedance outputs during power-up and power-down (VCC = 0–2.1 V), and its ±50 µA IOZPU/IOZPD leakage ensures minimal bus disturbance. However, full hot-swap compliance requires external circuitry (e.g., series resistors, TVS diodes) per system-level requirements.
Can the SN74ABT541BNS drive a 50-pF load at 20-MHz toggle rate?
Yes - with tPLH/tPHL ≤ 3.9 ns (max) and 64-mA IOL, the SN74ABT541BNS meets timing and drive requirements for 50-pF loads at 20 MHz. Measured skew tsk(o) ≤ 0.5 ns further ensures simultaneous switching integrity across all eight outputs.
Is the SN74ABT541BNS pin-compatible with older 74LS541 devices?
No - while functionally equivalent as octal 3-state buffers, the SN74ABT541BNS uses a 20-pin SOP (NS) package with different pin assignments than the 20-pin PDIP (N) 74LS541. Direct replacement requires PCB redesign; consult TI's ABT541B vs LS541 migration guide for layout guidance.
What is the maximum junction temperature for continuous operation of the SN74ABT541BNS?
The SN74ABT541BNS has a maximum junction temperature of 150°C, derived from its absolute maximum rating (Tstg = –65°C to +150°C) and thermal impedance θJA = 128°C/W for the NS package. At 64-mA IOL and 5-V VCC, typical power dissipation remains below 300 mW, keeping TJ well within limits under standard airflow conditions.
SN74ABT541BNS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.209", 5.30mm 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-SO
SN74ABT541BNS FAQ
1.How can I place an order for SN74ABT541BNS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT541BNS 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 SN74ABT541BNS reliable?
The price and inventory of SN74ABT541BNS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT541BNS is usually 5 days.
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SN74ABT541BNS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT541BNS 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 SN74ABT541BNS?
For technical support, including SN74ABT541BNS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT541BNS requirements.
6.How does Aetrix verify that SN74ABT541BNS is sourced from the original manufacturer or authorized distributors?
All SN74ABT541BNS 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 SN74ABT541BNS meets industry standards.
7.What is the process for return or replacement of SN74ABT541BNS?
All SN74ABT541BNS units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT541BNS, 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 SN74ABT541BNS part is unused and in its original packaging.
Return procedure for SN74ABT541BNS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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