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Texas Instruments SN74ABT541BN
- Part No.:
- SN74ABT541BN
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ABT541BN.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:386
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Product details
Overview
SN74ABT541BN from Texas Instruments is an octal buffer/driver with 3-state outputs in a 20-pin plastic DIP (PDIP-N) package, operating at 4.5–5.5 V, delivering ±32 mA high-drive capability and sub-5 ns propagation delay. It serves as a bus interface or memory address register buffer in industrial control backplanes and legacy data acquisition systems.
For engineers reviewing the SN74ABT541BN datasheet, SN74ABT541BN pinout, SN74ABT541BN application, or SN74ABT541BN equivalent, key selection criteria include dual active-low output-enable control, high-impedance state during power-up/down, latch-up immunity >500 mA, and compatibility with TTL/CMOS logic families in mixed-voltage board designs.
Technical Context
The SN74ABT541BN implements an EPIC-IIB™ BiCMOS architecture that reduces dynamic power dissipation while maintaining TTL-compatible input thresholds and CMOS-level output drive. Its dual OE inputs feed a two-input AND gate with active-low logic, ensuring all eight outputs enter high-impedance state if either OE1 or OE2 is asserted high.
During power transitions (VCC between 0–2.1 V), the device guarantees high-impedance outputs without external biasing; above 2.1 V, a pullup resistor on OE pins ensures robust disable behavior. Input clamping and output current limits comply with JEDEC JESD-17 for latch-up immunity.
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 buses) without signal degradation. |
| Propagation delay | 1.5–3.9 ns (tPLH/tPHL @ VCC=5 V, CL=50 pF) - Supports high-speed address/data buffering up to ~250 MHz toggle rate. |
| 3-state enable time | tPZH = 2.0–4.5 ns, tPLZ = 1.5–4.4 ns - Enables fast bus arbitration and multiplexed resource sharing. |
| Input threshold | VIL = 0.8 V, VIH = 2.0 V - Fully compatible with standard TTL logic levels for seamless integration. |
| Power-off isolation | Ioff ≤ ±100 µA @ VCC = 0 V - Prevents back-driving or leakage when upstream power is removed. |
| Thermal resistance | θJA = 67 °C/W (PDIP-N) - Allows operation at full drive strength up to 85°C ambient without forced cooling. |
Pinout & Package
SN74ABT541BN uses a 20-pin plastic dual in-line package (PDIP-N) with 0.3-inch body width and 0.1-inch lead pitch. The package features through-hole mounting, industry-standard footprint, and RoHS-compliant NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OE1, OE2 | Active-low output-enable inputs - Dual control allows independent or combined gating of all 8 outputs. |
| 3–10 | Y1–Y8 | Noninverting buffered outputs - High-drive 3-state outputs for bus driving or load isolation. |
| 11, 12 | GND, VCC | Power supply terminals - Decoupling capacitor placement near Pin 11 (GND) and Pin 20 (VCC) minimizes ground bounce. |
| 13–20 | A1–A8 | Buffer inputs - Inputs placed opposite outputs to simplify PCB routing and reduce crosstalk in dense layouts. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB™ BiCMOS process | Reduces dynamic power vs. pure bipolar while retaining TTL speed and drive - critical for thermally constrained legacy systems. |
| High-impedance on power ramp | Guaranteed Z-state when VCC ∈ [0, 2.1] V - eliminates bus contention during cold-start or brownout conditions. |
| Output ground bounce (VOLP) | <1 V @ VCC = 5 V, TA = 25°C - maintains signal integrity on shared ground planes with multiple drivers. |
| Latch-up immunity | >500 mA per JEDEC JESD-17 - withstands transient overcurrent events in noisy industrial environments. |
| Input clamp current | –18 mA (VI < 0) - protects against negative transients without external diodes in ruggedized I/O designs. |
Applications
| Industrial Backplane Interface | Legacy Memory Address Buffer |
|---|---|
Use Scenario: Isolating microcontroller address lines from extended ISA-style backplane with long trace lengths and multiple slot loads. IC Role / Device Role / Timing Role: Noninverting octal buffer providing level-shifting and fanout expansion between CPU and peripheral slots. Use Value: 64 mA sink capability drives 50 pF per line across 12-inch traces; sub-4 ns delay preserves setup/hold timing margins. |
Use Scenario: Driving 16-bit address bus of EPROM-based embedded controller with 8-bit data path and wait-state logic. IC Role / Device Role / Timing Role: Address register buffer enabling simultaneous access to multiple memory banks via OE-controlled bank selection. Use Value: Dual OE inputs allow hardware-selectable memory windows; high-Z state prevents bus contention during reset. |
| Test Equipment Signal Routing | Programmable Logic I/O Expansion |
Use Scenario: Multiplexing digital stimulus signals from FPGA-based pattern generator to DUT pins under software control. IC Role / Device Role / Timing Role: 3-state bus switch enabling dynamic reconfiguration of test vectors without physical rewiring. Use Value: 0.55 V VOL at 64 mA ensures clean logic low under full load; fast enable/disable supports real-time channel switching. |
Use Scenario: Expanding CPLD I/O count to drive discrete LEDs, relays, and opto-isolators in factory automation PLC modules. IC Role / Device Role / Timing Role: Output driver stage translating low-current CPLD outputs to industrial-level loads. Use Value: Latch-up immunity >500 mA protects against relay coil flyback; Ioff ≤ ±100 µA enables hot-swap safe I/O partitioning. |
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 buffers with separate OE controls per group; identical drive strength and timing. | Better suited for split-bus architectures requiring independent enable of high/low nibbles. | Select when granular control over subsets of outputs is required instead of unified 8-bit gating. |
| SN74LS244N | Lower drive (–15 mA / +20 mA), higher propagation delay (15–25 ns), TTL-only input compatibility. | Compatible only with legacy 5 V TTL systems; not suitable for mixed-voltage or high-speed designs. | Choose only for direct drop-in replacement in obsolete LS-based boards where speed and drive are non-critical. |
Compared with SN74ABT244N and SN74LS244N, the SN74ABT541BN provides unified 8-bit control and superior speed/drive for modernized industrial backplanes, while SN74ABT244N offers flexibility for segmented buses and SN74LS244N serves strictly legacy TTL compatibility.
Availability
SN74ABT541BN is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy memory address buffering, test equipment signal routing, programmable logic I/O expansion, and factory automation control systems requiring stable component supply across extended product lifecycles.
Supply support for SN74ABT541BN 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 90 years of innovation in industrial, automotive, and communications markets.
The SN74ABT541BN belongs to TI's ABT logic family - designed specifically for high-speed, high-drive 5 V bus interfacing in industrial and instrumentation applications where reliability and noise immunity are critical.
FAQ
What is the operating temperature range for the SN74ABT541BN?
The SN74ABT541BN is characterized for operation from –40°C to +85°C, making it suitable for industrial environments including factory floors, outdoor control cabinets, and unconditioned test equipment enclosures. This range is confirmed in the official TI datasheet SCBS093L and applies specifically to the PDIP-N package variant.
Does the SN74ABT541BN require external pull-up resistors on its OE pins?
The SN74ABT541BN guarantees high-impedance outputs during power-up/down (VCC < 2.1 V) without external components. However, above 2.1 V, TI recommends tying OE1 and OE2 to VCC via a pullup resistor - minimum value determined by the driver's current-sinking capability - to ensure deterministic disable behavior under all operating conditions.
Can the SN74ABT541BN be used with 3.3 V logic inputs?
No - the SN74ABT541BN has TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and is specified only for 4.5–5.5 V supply operation. Direct connection to 3.3 V logic may result in marginal or non-functional high-level recognition; level-shifting circuitry is required for interoperability with 3.3 V systems.
What is the maximum capacitive load the SN74ABT541BN can drive reliably?
The SN74ABT541BN's switching characteristics (tPLH, tPHL, tPZH, etc.) are specified with CL = 50 pF, and its ±64 mA output drive supports heavier loads in practice. For reliable signal integrity, TI recommends limiting total trace + stub + receiver capacitance to ≤75 pF per output when operating at maximum speed.
Is the SN74ABT541BN pin-compatible with other packages in the same family?
Yes - the SN74ABT541BN (PDIP-N) shares identical pinout and function with SN74ABT541BDW (SOIC-DW), SN74ABT541BDBR (SSOP-DB), and SN74ABT541BPWR (TSSOP-PW). All variants use the same 20-pin top-view layout with OE1/A1/Y1 on Pin 1–3 and GND/VCC on Pins 11–12, enabling direct PCB footprint substitution.
SN74ABT541BN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 20-PDIP
SN74ABT541BN FAQ
1.How can I place an order for SN74ABT541BN through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT541BN 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 SN74ABT541BN reliable?
The price and inventory of SN74ABT541BN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT541BN is usually 5 days.
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SN74ABT541BN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT541BN 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 SN74ABT541BN?
For technical support, including SN74ABT541BN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT541BN requirements.
6.How does Aetrix verify that SN74ABT541BN is sourced from the original manufacturer or authorized distributors?
All SN74ABT541BN 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 SN74ABT541BN meets industry standards.
7.What is the process for return or replacement of SN74ABT541BN?
All SN74ABT541BN units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT541BN, 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 SN74ABT541BN part is unused and in its original packaging.
Return procedure for SN74ABT541BN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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