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Texas Instruments SN74ABT541BDBRG4
- Part No.:
- SN74ABT541BDBRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74ABT541BDBRG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,671
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Product details
Overview
SN74ABT541BDBRG4 from Texas Instruments is an octal buffer/driver with 3-state outputs in a 20-pin SSOP (DB) package, operating from 4.5 V to 5.5 V supply, delivering ±32 mA high-drive capability and sub-4 ns propagation delay at 5 V. It is designed for bus line driving and memory address register buffering in industrial control and data acquisition systems.
For engineers reviewing the SN74ABT541BDBRG4 datasheet, SN74ABT541BDBRG4 pinout, SN74ABT541BDBRG4 application, or SN74ABT541BDBRG4 equivalent, key selection criteria include 3-state enable logic (dual active-low OE), high-impedance behavior during power-up/down, output ground bounce <1 V, latch-up immunity >500 mA, and compatibility with 5-V TTL/CMOS logic families.
Technical Context
The SN74ABT541BDBRG4 implements an EPIC-IIB™ BiCMOS architecture that reduces dynamic power dissipation while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V) and rail-to-rail output swing. Its dual active-low output-enable inputs (OE1, OE2) form a two-input AND gate: either high forces all eight Y outputs into high-impedance state.
During power transitions (VCC between 0–2.1 V), the device auto-enters high-impedance mode without external control; above 2.1 V, OE must be pulled high via external resistor to guarantee disable. Input and output capacitances are specified at 3 pF and 6 pF respectively, supporting clean signal integrity on dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V logic rails and tolerance to supply ripple. |
| Output Drive | –32 mA IOH / +64 mA IOL - enables direct interfacing with heavy capacitive loads or multiple TTL inputs without external buffers. |
| Propagation Delay | 1.5–3.9 ns (tPLH/tPHL at VCC = 5 V, CL = 50 pF) - supports high-speed bus timing in microcontroller peripheral interfaces. |
| Power-Up Behavior | High-impedance state when VCC < 2.1 V - prevents bus contention during system power sequencing. |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V - guarantees robust noise margin and interoperability with legacy 5-V TTL and CMOS devices. |
| Output Ground Bounce | VOLP < 1 V at VCC = 5 V, TA = 25°C - minimizes switching noise coupling into shared ground planes. |
| Latch-Up Immunity | >500 mA per JEDEC JESD-17 - provides reliability in electrically noisy industrial environments. |
Pinout & Package
SN74ABT541BDBRG4 uses a 20-pin Shrink Small-Outline Package (SSOP-DB) with 0.65 mm lead pitch, 7.5 mm × 5.6 mm body size, and 2.0 mm max height. Pin 1 is located at the top-left corner with index area marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OE1, OE2 | Active-low output-enable inputs; both must be low for Y1–Y8 to follow A1–A8; either high disables all outputs. |
| 3–10 | Y1–Y8 | 3-state buffered outputs; driven low/high when enabled, high-Z when disabled - isolates bus segments. |
| 11, 12 | GND, VCC | Ground and 5-V supply pins placed diagonally opposite to minimize supply loop inductance. |
| 13–20 | A1–A8 | Noninverting data inputs; placed on opposite side of package from outputs to simplify PCB trace routing across bus lines. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB™ BiCMOS process | Reduces dynamic power vs. pure bipolar while retaining TTL drive strength and speed. |
| Dual independent OE control | Enables flexible bus partitioning - e.g., OE1 controls first four channels, OE2 controls last four. |
| High-impedance during power transitions | Eliminates need for external power-on reset circuitry to manage bus contention. |
| High-drive outputs | –32 mA source / +64 mA sink supports fan-out to ≥10 standard TTL loads or long PCB traces. |
| Low output ground bounce | <1 V VOLP ensures stable reference for adjacent sensitive analog or clock circuits sharing same ground plane. |
Applications
| Industrial PLC Backplane Interface | Microcontroller Address Bus Buffer |
|---|---|
Use Scenario: Isolating CPU address lines from noisy I/O modules in programmable logic controllers using shared backplane wiring. IC Role / Device Role / Timing Role: Noninverting octal buffer with 3-state outputs enabling time-multiplexed access to multiple memory-mapped peripherals. Use Value: Prevents address bus contention during module hot-swap and ensures clean edge transitions despite 50-pF backplane capacitance. | Use Scenario: Driving 16-bit address lines from an MCU to external SRAM or flash memory in embedded instrumentation. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer between MCU GPIO and memory address inputs requiring 64-mA sink capability. Use Value: Meets tPLH/tPHL ≤ 3.9 ns requirement for 25-MHz memory access cycles while maintaining signal integrity. |
| Test Equipment Digital Pattern Generator | Legacy System Bus Extender |
Use Scenario: Generating synchronized digital stimulus waveforms across eight parallel channels in automated test equipment. IC Role / Device Role / Timing Role: Precision-timed buffer with matched propagation delays (tsk(o) ≤ 0.5 ns) ensuring skew-controlled parallel output edges. Use Value: Enables deterministic timing alignment across all eight outputs for accurate bit-level pattern generation. | Use Scenario: Extending ISA or similar 8-bit data/address buses between legacy motherboard and add-in expansion cards. IC Role / Device Role / Timing Role: Bidirectional bus driver with 3-state control allowing shared bus arbitration between master and slave devices. Use Value: Provides TTL-compatible voltage levels and drive strength required by vintage peripheral ICs while preventing bus lockup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT244DBR | Octal buffer with separate A→Y and Y→A direction control; no dual OE; higher ICC (250 µA vs. 1 µA in disabled state). | Suitable for bidirectional bus transceivers; less optimal for unidirectional address latching where dual OE simplifies control logic. | Choose SN74ABT541BDBRG4 when independent channel-group enable is needed; choose SN74ABT244DBR for true bidirectional data flow. |
| SN74LVC8T245PW | 3.3-V only operation; dual-supply I/O; lower drive (±24 mA); different pinout (24-pin TSSOP); level-shifting capability. | Designed for mixed-voltage systems (e.g., 3.3-V MCU to 5-V peripherals); not drop-in compatible due to voltage and pin count mismatch. | Select SN74ABT541BDBRG4 for native 5-V systems requiring high drive and proven industrial temperature range (–40°C to 85°C). |
Compared with SN74ABT244DBR and SN74LVC8T245PW, the SN74ABT541BDBRG4 offers superior 5-V drive strength, dual OE flexibility for segmented bus control, and guaranteed high-Z behavior during power ramp-making it optimal for industrial backplane and memory interface applications where voltage compatibility and sequencing safety are critical.
Availability
SN74ABT541BDBRG4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, microcontroller address bus extensions, automated test equipment pattern generation, and legacy system bus expansion requiring stable component supply and long-term lifecycle support.
Supply support for SN74ABT541BDBRG4 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 high-reliability interface ICs.
The SN74ABT541BDBRG4 belongs to TI's ABT logic family, engineered for high-speed, low-noise 5-V bus interfacing in industrial automation, test equipment, and computing infrastructure where robustness and timing precision are essential.
FAQ
What is the operating temperature range for SN74ABT541BDBRG4?
The SN74ABT541BDBRG4 is characterized for operation from –40°C to +85°C ambient temperature, meeting industrial-grade requirements. This range is validated per the manufacturer's recommended operating conditions and applies specifically to the DB-package variant; military-grade variants (e.g., SNJ54ABT541J) extend to –55°C to +125°C but use different packages and markings.
Does SN74ABT541BDBRG4 support hot-swap or live-insertion on a powered bus?
Yes, the SN74ABT541BDBRG4 enters high-impedance state automatically when VCC drops below 2.1 V, and its Ioff specification (±100 µA at VCC = 0 V) limits leakage current during partial power-down. However, full hot-swap compliance requires external current-limiting and sequencing circuitry - the device itself provides foundational isolation but does not include integrated hot-swap controllers.
How does the dual OE structure (OE1 and OE2) function in SN74ABT541BDBRG4?
In SN74ABT541BDBRG4, OE1 and OE2 feed a two-input AND gate with active-low logic: only when both are low do outputs Y1–Y8 follow inputs A1–A8. If either OE1 or OE2 is high, all eight outputs go high-impedance. This allows grouped enable control - for example, OE1 can manage Y1–Y4 while OE2 manages Y5–Y8 - without requiring additional logic gates.
Can SN74ABT541BDBRG4 be used with 3.3-V microcontrollers?
No - SN74ABT541BDBRG4 is a 5-V-only device with VIH = 2.0 V minimum and VIL = 0.8 V maximum, making it incompatible with 3.3-V logic levels unless interfaced via level translators. Its input thresholds are optimized for TTL/5-V CMOS, and operation below 4.5 V violates recommended conditions. For 3.3-V systems, consider SN74LVC8T245 or similar LVC-family devices.
What is the maximum capacitive load SN74ABT541BDBRG4 can drive while maintaining specified timing?
The SN74ABT541BDBRG4 switching characteristics (e.g., tPLH ≤ 3.9 ns) are specified at CL = 50 pF. While it can drive heavier loads (e.g., 100 pF), propagation delay increases nonlinearly and ground bounce worsens. For reliable operation beyond 50 pF, derate timing margins and verify with board-level simulation or measurement - the device's 64-mA IOL supports moderate trace capacitance but not unterminated transmission lines.
SN74ABT541BDBRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-SSOP
SN74ABT541BDBRG4 FAQ
1.How can I place an order for SN74ABT541BDBRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT541BDBRG4 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 SN74ABT541BDBRG4 reliable?
The price and inventory of SN74ABT541BDBRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT541BDBRG4 is usually 5 days.
3.What payment methods are accepted for SN74ABT541BDBRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT541BDBRG4 transactions.
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4.How is shipping managed for SN74ABT541BDBRG4?
SN74ABT541BDBRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT541BDBRG4 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 SN74ABT541BDBRG4?
For technical support, including SN74ABT541BDBRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT541BDBRG4 requirements.
6.How does Aetrix verify that SN74ABT541BDBRG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT541BDBRG4 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 SN74ABT541BDBRG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT541BDBRG4?
All SN74ABT541BDBRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT541BDBRG4, 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 SN74ABT541BDBRG4 part is unused and in its original packaging.
Return procedure for SN74ABT541BDBRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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