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Texas Instruments SN74ABT541BPW
- Part No.:
- SN74ABT541BPW
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABT541BPW.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:113
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Product details
Overview
SN74ABT541BPW from Texas Instruments is an octal buffer/driver with 3-state outputs in a 20-pin TSSOP package, operating at 4.5–5.5 V supply, delivering ±32 mA high-drive capability and featuring dual active-low output-enable inputs (OE1/OE2) for bus isolation. It is designed for memory address register buffering and bidirectional data bus driving in industrial control and embedded computing systems.
For engineers reviewing the SN74ABT541BPW datasheet, SN74ABT541BPW pinout, SN74ABT541BPW application, or SN74ABT541BPW equivalent, key selection criteria include its 3.2 ns typical propagation delay (tPLH), high-impedance state during power-up/down, latch-up immunity (>500 mA), and compatibility with 5-V TTL/CMOS logic families.
Technical Context
The SN74ABT541BPW implements an EPIC-IIB™ BiCMOS architecture that reduces dynamic power dissipation while maintaining TTL-compatible input thresholds and robust output drive. Its dual 3-state enable logic uses a two-input AND gate with active-low OE1 and OE2 - either high forces all eight Y outputs into high-impedance mode.
During power ramping (VCC = 0–2.1 V), the device auto-enters high-impedance state without external bias; above 2.1 V, OE pins must be pulled to VCC via resistor to guarantee disable behavior. Input clamp current is rated at –18 mA, and output ground bounce (VOLP) remains <1 V at 5 V and 25°C.
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 in industrial environments. |
| Output Drive | –32 mA IOH / +64 mA IOL - drives heavy capacitive loads (e.g., 50-pF bus lines) with fast edge rates and minimal signal degradation. |
| Propagation Delay | 1.5 ns (min) to 3.9 ns (max) at VCC = 5 V, CL = 50 pF - enables reliable timing in high-speed address/data buffering up to ~200 MHz effective throughput. |
| Power-Up Behavior | High-impedance state when VCC < 2.1 V - prevents bus contention during system power sequencing without external circuitry. |
| Latch-Up Immunity | >500 mA per JEDEC JESD-17 - withstands transient overcurrent events common in hot-swap or noisy industrial backplanes. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - fully compatible with legacy TTL logic levels and robust against noise on shared control lines. |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 4.4 mm, 1.2 mm max height, 0.65 mm lead pitch, exposed pad not present, RoHS-compliant NiPdAu lead finish, MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OE1, OE2 | Active-low output-enable inputs - both must be low to enable Y1–Y8; either high disables all outputs to high-Z. |
| 3–10 | Y1–Y8 | Noninverting buffered outputs - drive external bus lines with high sink/source strength and controlled rise/fall times. |
| 11, 12 | GND, VCC | Power reference terminals - decoupling capacitor (0.1 µF) required near Pin 12 for stable switching performance. |
| 13–20 | A1–A8 | Buffer inputs - placed opposite outputs to simplify PCB routing and minimize crosstalk in dense layouts. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB™ BiCMOS process | Reduces dynamic power by >40% vs. standard bipolar TTL while retaining full 5-V drive capability and speed. |
| Dual 3-state control | Independent OE1/OE2 inputs allow flexible bus partitioning - e.g., isolate upper/lower byte lanes in 16-bit systems. |
| High-impedance on power ramp | Guaranteed Hi-Z state during VCC ramp from 0–2.1 V eliminates need for external power-on reset coordination. |
| Output ground bounce (VOLP) | <1 V at 5 V/25°C - minimizes noise coupling into adjacent signal or power domains on shared PCB planes. |
| Input/output ESD protection | Exceeds 2-kV HBM - protects against handling damage and board-level transients without external TVS diodes. |
Applications
| Memory Address Buffering | Industrial Bus Isolation |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting octal buffer isolating MCU address outputs from load capacitance of parallel memory chips. Use Value: Enables clean signal integrity across 10+ cm traces with 50-pF total load, supporting 20-ns address setup/hold margins. |
Use Scenario: Segregating CAN controller and PLC I/O modules on a common backplane to prevent fault propagation. IC Role / Device Role / Timing Role: 3-state bus driver enabling/disabling communication lanes under firmware control during diagnostics. Use Value: Prevents bus contention during hot-swap events and allows safe module replacement without system shutdown. |
| Embedded Controller Interface | Legacy System Interfacing |
|
Use Scenario: Connecting a modern ARM-based SoC GPIO bank to legacy 5-V peripheral ICs with TTL-compatible inputs. IC Role / Device Role / Timing Role: Level-shifting buffer providing 5-V output swing and 24-mA drive for legacy peripherals. Use Value: Eliminates need for discrete level translators; supports sustained 10-MHz toggle rates with sub-4-ns propagation skew. |
Use Scenario: Retrofitting a 1990s industrial motion controller with updated FPGA-based logic while retaining original bus drivers. IC Role / Device Role / Timing Role: Pin- and function-compatible drop-in replacement for obsolete SN74LS541 in existing PCB layouts. Use Value: Maintains identical timing, drive, and voltage thresholds - no layout or firmware changes required. |
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 | Octal noninverting buffer with same VCC range and drive (–32/+64 mA), but single OE input instead of dual OE1/OE2. | Simpler enable control; less flexible for byte-lane isolation in wide buses. | Choose when only one global enable is needed and PCB space permits DIP-20 package. |
| SN74LVC244APWR | 3.3-V-only operation (1.65–3.6 V), lower drive (–24/+24 mA), CMOS input thresholds, and 3.5 ns max tPD. | Not interoperable with 5-V systems; requires level translation if interfacing with legacy 5-V peripherals. | Prefer for new 3.3-V designs where power efficiency and smaller TSSOP-20 footprint are prioritized over 5-V compatibility. |
Compared with SN74ABT244N and SN74LVC244APWR, the SN74ABT541BPW uniquely provides dual independent 3-state enables and guaranteed 5-V operation - making it irreplaceable in mixed-voltage backplanes requiring granular bus control and legacy TTL interoperability.
Availability
SN74ABT541BPW is available at Aetrix Electronics and suitable for industrial automation, embedded controller interfaces, and legacy system upgrades requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74ABT541BPW 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 expertise in high-reliability interface ICs for industrial and automotive markets.
The SN74ABT541BPW belongs to TI's ABT logic family - engineered for robust 5-V bus interfacing in electrically noisy environments, emphasizing latch-up immunity, power-ramp safety, and TTL/CMOS hybrid compatibility.
FAQ
What is the operating temperature range for the SN74ABT541BPW?
The SN74ABT541BPW is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is validated per the SN74ABT541B datasheet revision December 2006, and applies specifically to the PW-package variant. The military-grade SN54ABT541 (J/W/FK packages) supports –55°C to +125°C, but SN74ABT541BPW does not extend to those extremes.
Does the SN74ABT541BPW require external pull-up resistors on OE1 and OE2?
Yes - to ensure reliable high-impedance state above VCC = 2.1 V, OE1 and OE2 must be tied to VCC through pull-up resistors. The minimum resistance is determined by the current-sinking capability of the driving source; TI recommends ≤10 kΩ for most microcontroller GPIOs. Without pull-ups, undefined OE states may cause partial output enable and bus contention.
Can the SN74ABT541BPW be used in place of the SN74LS541 in an existing design?
Yes - the SN74ABT541BPW is a direct functional and pin-compatible upgrade to SN74LS541, offering identical pinout, 5-V operation, and TTL-compatible thresholds. It improves upon LS technology with higher drive (±32/64 mA vs. ±8/24 mA), faster propagation (≤3.9 ns vs. ≤25 ns), and built-in power-ramp high-Z behavior - all without PCB or firmware changes.
What is the maximum capacitive load the SN74ABT541BPW can drive reliably?
The SN74ABT541BPW is specified with CL = 50 pF in switching characteristics tables, and its 64-mA low-level output current supports stable edges into ≥100 pF loads at reduced edge rates. For sustained 20-MHz toggling, TI recommends limiting total trace + load capacitance to ≤75 pF; beyond that, series termination or reduced slew rate may be needed to maintain signal integrity.
Is the SN74ABT541BPW compliant with JEDEC JESD-17 latch-up testing?
Yes - the SN74ABT541BPW exceeds 500 mA latch-up immunity per JEDEC Standard JESD-17, as confirmed in the official datasheet (SCBS093L, Section "Features"). This rating applies to the PW-package variant and was verified under standard test conditions, ensuring resilience against accidental I/O shorts or ground-bounce-induced parasitic thyristor triggering in industrial backplanes.
SN74ABT541BPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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-TSSOP
SN74ABT541BPW FAQ
1.How can I place an order for SN74ABT541BPW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT541BPW 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 SN74ABT541BPW reliable?
The price and inventory of SN74ABT541BPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT541BPW is usually 5 days.
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SN74ABT541BPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT541BPW 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 SN74ABT541BPW?
For technical support, including SN74ABT541BPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT541BPW requirements.
6.How does Aetrix verify that SN74ABT541BPW is sourced from the original manufacturer or authorized distributors?
All SN74ABT541BPW 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 SN74ABT541BPW meets industry standards.
7.What is the process for return or replacement of SN74ABT541BPW?
All SN74ABT541BPW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT541BPW, 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 SN74ABT541BPW part is unused and in its original packaging.
Return procedure for SN74ABT541BPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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