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Texas Instruments SN74ABT541BDB
- Part No.:
- SN74ABT541BDB
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74ABT541BDB.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74ABT541BDB 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 delivers high-drive capability (–32 mA IOH, 64 mA IOL), supports –40°C to 85°C operation, and features dual active-low output-enable inputs (OE1\, OE2\) controlling all eight outputs simultaneously.
For engineers reviewing the SN74ABT541BDB datasheet, SN74ABT541BDB pinout, SN74ABT541BDB application, or SN74ABT541BDB equivalent, key selection considerations include its BiCMOS EPIC-II™ architecture for low power dissipation, power-up/power-down high-impedance safety, ground bounce <1 V at 5 V/25°C, and compatibility with standard 20-pin SSOP layout constraints.
Technical Context
The SN74ABT541BDB implements a dual-input AND gate logic for 3-state control, where either OE1\ or OE2\ asserted high forces all outputs into high-impedance-enabling flexible bus arbitration. Its BiCMOS EPIC-II™ process enables TTL-level input thresholds (VIL = 0.8 V, VIH = 2 V) while delivering CMOS-like low static current (≤250 µA disabled) and fast propagation (tPLH/tPHL ≤ 3.6 ns typical at 5 V).
It guarantees latch-up immunity >500 mA per JESD-17, operates safely across 4.5–5.5 V supply, and maintains high-impedance during VCC ramp (0–2.1 V); above 2.1 V, external pullup on OE\ ensures robust 3-state hold. Input/output capacitance is tightly specified (Ci = 3 pF, Co = 6 pF), supporting clean signal integrity in 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 TTL and mixed-voltage system rails. |
| Output Drive | –32 mA IOH / 64 mA IOL - Sinks/sourcing sufficient current to drive multiple TTL loads or stub-loaded buses without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 3.6 ns (typ) - Enables reliable operation in high-speed data paths up to ~250 MHz clock-equivalent timing. |
| 3-State Enable Time | tPZL ≤ 5.9 ns (max) - Supports rapid bus turnaround in time-critical multiplexed architectures. |
| Input Thresholds | VIH = 2 V, VIL = 0.8 V - Matches legacy TTL logic families for seamless interface without level-shifting. |
| Power-Up Safety | High-Z state guaranteed for VCC = 0–2.1 V - Prevents bus contention during power sequencing in multi-rail systems. |
| Thermal Resistance | θJA = 115°C/W (DB package) - Defines maximum power dissipation limit (~350 mW at 70°C ambient) for thermal design margining. |
Pinout & Package
SN74ABT541BDB uses a 20-pin Shrink Small-Outline Package (SSOP, DB), with inputs (A1–A8) on one side and outputs (Y1–Y8) on the opposite side to simplify PCB trace routing and minimize crosstalk. Dual output-enable pins (OE1\, OE2\) and dedicated VCC/GND pins support robust power integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1\, OE2\ | Active-low 3-state enable inputs - Either high forces all Y outputs into high-impedance; AND logic allows redundant control or OR-style disable via external inversion. |
| 2–9 | A1–A8 | Noninverting data inputs - Directly drive corresponding Y outputs when enabled; TTL-compatible thresholds ensure noise margin with legacy drivers. |
| 11–18 | Y1–Y8 | Buffered noninverting outputs - High-drive capability supports fanout to ≥10 standard TTL loads; low ground bounce (<1 V) preserves signal integrity. |
| 10 | GND | Ground reference - Dedicated pin minimizes ground loop impedance; must be connected to low-impedance system ground plane. |
| 20 | VCC | Positive supply - Requires local 0.1-µF ceramic decoupling adjacent to pin to suppress switching noise and maintain stable 5-V rail. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-II™ BiCMOS Process | Reduces static power vs. bipolar-only designs while retaining TTL speed and drive - critical for thermally constrained industrial controllers. |
| Power-Up/Down High-Z | Automatic 3-state entry below 2.1 V VCC eliminates need for external reset sequencing logic in hot-swap or brownout scenarios. |
| Latch-Up Immunity | Exceeds 500 mA per JESD-17 - Ensures robustness against transient overcurrent events in noisy industrial environments. |
| Low Output Ground Bounce | VOLP < 1 V at 5 V/25°C - Minimizes simultaneous switching noise that could corrupt adjacent data or clock lines on shared PCB layers. |
| Input/Output Separation | Opposite-side pin arrangement (A on left, Y on right) enables straight-through PCB routing - reduces layer count and vias in space-constrained designs. |
Applications
| Memory Address Buffering | Parallel Bus Driver |
|---|---|
|
Use Scenario: Buffering 8-bit address lines between microcontroller and SRAM/ROM in embedded instrumentation. IC Role / Device Role / Timing Role: Noninverting octal buffer isolating MCU address outputs from capacitive bus load, ensuring setup/hold timing margins under full fanout. Use Value: Eliminates timing violations caused by trace capacitance; high drive (64 mA IOL) maintains VOL ≤ 0.55 V even with 100-pF total load. |
Use Scenario: Driving shared 8-bit data bus among multiple peripherals (ADC, DAC, FPGA) in test equipment. IC Role / Device Role / Timing Role: 3-state bus transceiver enabling bidirectional data flow control via OE1\ and OE2\ signals synchronized to system clock domain. Use Value: Fast disable time (tPZL ≤ 5.9 ns) allows sub-10-ns bus turnaround, supporting >100-MHz burst transfer rates without contention. |
| Industrial Control Backplane | TTL-Level Signal Conditioning |
|
Use Scenario: Interfacing PLC I/O modules to centralized controller via 20-cm ribbon cable backplane. IC Role / Device Role / Timing Role: Line driver boosting signal edge rate and noise immunity across unterminated cables using high-current outputs. Use Value: Low ground bounce (<1 V) prevents false triggering of downstream comparators; latch-up immunity (>500 mA) withstands ESD-induced transients. |
Use Scenario: Converting 3.3-V FPGA I/O to 5-V TTL levels for legacy sensor interface in factory automation. IC Role / Device Role / Timing Role: Level-shifting buffer leveraging TTL input thresholds (VIH = 2 V) to accept 3.3-V logic highs without external biasing. Use Value: Eliminates need for discrete resistor networks or dedicated level shifters - reduces BOM cost and board area in retrofit designs. |
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 buffer with separate A/B-side enables (no dual-OE AND logic); identical drive (–32/64 mA) and timing (tPLH ≤ 3.6 ns). | Requires two independent enable signals instead of single dual-input control; better suited for asymmetric bus partitioning. | Choose SN74ABT244N when discrete control of two 4-bit groups is needed; SN74ABT541BDB preferred for unified 8-bit enable. |
| 74ACT541SCX | CMOS version with lower ICC (≤10 µA) but reduced drive (–24/24 mA); compatible 20-pin SOIC (SO-20) but not SSOP. | Lower power but insufficient for driving >5 TTL loads; unsuitable for high-noise industrial settings due to weaker latch-up rating (200 mA). | Select 74ACT541SCX only for low-power, low-fanout consumer applications; SN74ABT541BDB remains optimal for industrial bus driving. |
Compared with SN74ABT244N and 74ACT541SCX, SN74ABT541BDB uniquely combines dual active-low OE logic, military-grade latch-up immunity, and SSOP packaging-making it the most robust choice for industrial bus isolation where timing predictability and fault tolerance are critical.
Availability
SN74ABT541BDB is available at Aetrix Electronics and suitable for industrial control backplanes, memory subsystems, and parallel data interfaces requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT541BDB 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 high-reliability industrial and automotive ICs.
The SN74ABT541BDB belongs to TI's ABT advanced BiCMOS logic family, engineered specifically for high-speed, high-drive bus interfacing in noise-prone industrial and instrumentation systems.
FAQ
What is the operating temperature range for SN74ABT541BDB?
The SN74ABT541BDB is characterized for operation from –40°C to +85°C, making it suitable for industrial environments including factory automation, motor drives, and outdoor control cabinets where ambient temperatures exceed commercial-grade limits. This range is validated per JEDEC JESD78 reliability testing protocols and confirmed in the official SCBS093K datasheet revision.
Does SN74ABT541BDB require external pull-up resistors on OE\ pins?
Yes - to guarantee 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 driver's current-sinking capability; TI recommends ≤10 kΩ for robust noise immunity while maintaining fast disable timing. This requirement is explicitly stated in the functional description section of the SN74ABT541B datasheet.
What package type does SN74ABT541BDB use, and what are its dimensions?
SN74ABT541BDB uses a 20-pin Shrink Small-Outline Package (SSOP, DB) measuring 7.2 mm × 5.3 mm with 0.65-mm lead pitch. This compact surface-mount footprint supports high-density PCB layouts while maintaining mechanical robustness and thermal performance (θJA = 115°C/W). Package dimensions and land pattern details are fully specified in TI's DB package drawing SLMS005.
Can SN74ABT541BDB drive standard TTL loads directly?
Yes - SN74ABT541BDB is rated for –32 mA high-level and 64 mA low-level output current, exceeding the –0.4 mA/1.6 mA requirements of standard TTL. It can reliably drive up to 10 standard TTL inputs (fanout of 10) while maintaining VOL ≤ 0.55 V and VOH ≥ 2.0 V across the full operating range, as verified in the electrical characteristics table of SCBS093K.
Is SN74ABT541BDB pin-compatible with older 74LS541 devices?
No - although functionally similar as octal 3-state buffers, SN74ABT541BDB uses a 20-pin SSOP (DB) package while 74LS541 typically uses 20-pin PDIP (N) or SOIC (DW). Pin assignments differ: SN74ABT541BDB places A1–A8 on pins 2–9 and Y1–Y8 on pins 11–18, whereas 74LS541 maps inputs/outputs differently. Direct replacement requires PCB redesign.
SN74ABT541BDB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- 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-SSOP
SN74ABT541BDB FAQ
1.How can I place an order for SN74ABT541BDB through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT541BDB 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 SN74ABT541BDB reliable?
The price and inventory of SN74ABT541BDB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT541BDB is usually 5 days.
3.What payment methods are accepted for SN74ABT541BDB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT541BDB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT541BDB?
SN74ABT541BDB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT541BDB 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 SN74ABT541BDB?
For technical support, including SN74ABT541BDB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT541BDB requirements.
6.How does Aetrix verify that SN74ABT541BDB is sourced from the original manufacturer or authorized distributors?
All SN74ABT541BDB 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 SN74ABT541BDB meets industry standards.
7.What is the process for return or replacement of SN74ABT541BDB?
All SN74ABT541BDB units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT541BDB, 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 SN74ABT541BDB part is unused and in its original packaging.
Return procedure for SN74ABT541BDB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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