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Texas Instruments SN74ABT541BDBR
- Part No.:
- SN74ABT541BDBR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74ABT541BDBR.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,118
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Product details
Overview
SN74ABT541BDBR 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 SN74ABT541BDBR datasheet, SN74ABT541BDBR pinout, SN74ABT541BDBR application, or SN74ABT541BDBR 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 5-V TTL/CMOS logic families.
Technical Context
The SN74ABT541BDBR implements an EPIC-IIB™ BiCMOS architecture that reduces dynamic power dissipation while maintaining TTL-compatible input thresholds and high-current drive strength. Its dual 3-state enable inputs (OE1, OE2) form a two-input AND gate with active-low logic: either high disables all eight outputs into high-impedance mode.
During power transitions (VCC between 0–2.1 V), the device automatically enters high-impedance state without external biasing. For reliable disable above 2.1 V, OE pins require pull-up to VCC - minimum resistor value determined by driver sink capability per TI SCBA004 guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures robust operation across standard 5-V rail tolerances and noise margins. |
| Output Drive | –32 mA IOH / +64 mA IOL - supports heavy capacitive loads and fan-out to multiple TTL inputs without signal degradation. |
| Propagation Delay | 1.5–3.9 ns (tPLH/tPHL @ VCC = 5 V, CL = 50 pF) - enables high-speed bus timing in 20–30 MHz system clock domains. |
| Power-Up Safety | High-Z state guaranteed at VCC < 2.1 V - prevents bus contention during cold-start or brownout conditions. |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V - fully compatible with standard TTL logic levels and mixed-voltage interface designs. |
| Latch-Up Immunity | >500 mA per JESD-17 - meets military-grade robustness requirements for industrial and harsh-environment applications. |
Pinout & Package
SN74ABT541BDBR uses a 20-pin Shrink Small-Outline Package (SSOP-DB), 7.4 mm × 5.3 mm body, 0.65 mm lead pitch, 2.0 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OE1, OE2 | Active-low 3-state enable inputs - both must be low for output buffer activation; OR logic behavior simplifies control wiring. |
| 3–10 | Y1–Y8 | Noninverting buffered outputs - drive bidirectional buses or address lines with high current and low ground bounce (<1 V). |
| 11, 12 | GND, VCC | Power terminals - dedicated pins minimize supply noise coupling; decoupling capacitor placement critical near Pin 12. |
| 13–20 | A1–A8 | Buffer 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 by >40% vs. legacy bipolar buffers while retaining TTL drive strength and speed. |
| Dual independent OE control | Enables flexible partitioning of 8-channel output bank - e.g., split memory/data bus segments with separate gating. |
| High-impedance on power ramp | Eliminates need for external power-on reset sequencing - safe insertion into live backplanes or hot-swap modules. |
| Output ground bounce <1 V | Ensures signal integrity under fast switching into 50-pF loads - critical for noise-sensitive analog/mixed-signal subsystems. |
| Input clamp current rating | –18 mA IIK - protects against ESD transients and overvoltage faults without external diodes in most board-level designs. |
Applications
| Industrial PLC Backplane Interface | Memory Address Buffering |
|---|---|
Use Scenario: Driving parallel I/O expansion slots in programmable logic controllers where multiple modules share a common data/address bus. IC Role / Device Role / Timing Role: Bidirectional bus buffer isolating CPU address lines from peripheral module loading and noise. Use Value: Prevents timing skew and signal integrity loss across 20+ cm backplane traces using 64-mA drive strength and sub-4 ns delay. |
Use Scenario: Isolating microcontroller address bus from SRAM/Flash memory chips in embedded instrumentation systems. IC Role / Device Role / Timing Role: Noninverting address line repeater ensuring setup/hold margin compliance at 25 MHz access rates. Use Value: Maintains deterministic propagation delay across all 8 bits (skew <0.5 ns), eliminating address decode glitches. |
| Test Equipment Signal Conditioning | Legacy System Bus Extender |
Use Scenario: Level-shifting and fan-out amplification for digital pattern generators interfacing with DUTs requiring TTL-compatible inputs. IC Role / Device Role / Timing Role: Output driver stage converting FPGA I/O to robust 5-V signaling with controlled edge rates. Use Value: Delivers clean 32-mA high-side and 64-mA low-side drive into 50-Ω terminated lines, minimizing reflections. |
Use Scenario: Adding additional ISA or VMEbus slots to aging industrial computers without modifying motherboard layout. IC Role / Device Role / Timing Role: Bus isolation buffer preventing loading-induced timing violations when expanding peripheral count. Use Value: High-Z disable state eliminates contention during slot enumeration; latch-up immunity ensures field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT244DBR | Two 4-bit buffers with independent OE per group; same DB package, identical voltage/current specs. | Better suited for asymmetric bus partitioning (e.g., separate data/control lanes) rather than full 8-bit unidirectional buffering. | Select when system requires granular enable control over subsets of signals instead of monolithic 8-bit gating. |
| SN74LVC8T245PW | 8-bit dual-supply transceiver (1.65–5.5 V), 32-mA drive, but only 24-mA IOL; TSSOP-24 package, different pinout. | Supports level translation between 3.3-V MCU and 5-V peripherals; lacks latch-up immunity >500 mA. | Choose only if voltage translation is required; not drop-in due to pin count, pinout, and robustness differences. |
Compared with SN74ABT541BDBR, SN74ABT244DBR offers finer enable granularity at no cost to performance or footprint, while SN74LVC8T245PW trades industrial robustness for voltage flexibility - making the original optimal for fixed 5-V, high-reliability bus isolation.
Availability
SN74ABT541BDBR is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, memory address buffering, test equipment signal conditioning, and legacy system bus extension requiring stable component supply and long-term lifecycle support.
Supply support for SN74ABT541BDBR 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 industrial-grade product development.
The SN74ABT541B series belongs to TI's ABT logic family, engineered for high-speed, high-drive 5-V bus interfacing in mission-critical industrial and instrumentation applications.
FAQ
What is the recommended pull-up resistor value for OE pins on SN74ABT541BDBR?
The minimum pull-up resistor value for OE1/OE2 on SN74ABT541BDBR is determined by the current-sinking capability of the driving source. TI recommends referencing application report SCBA004 for calculation methodology. For typical 5-V CMOS drivers, 10 kΩ provides sufficient margin while limiting quiescent current to <0.5 mA. The SN74ABT541BDBR itself draws negligible current into OE pins in the high state.
Does SN74ABT541BDBR support hot-swap operation?
Yes, SN74ABT541BDBR supports hot-swap operation due to its guaranteed high-impedance state when VCC is below 2.1 V. This prevents bus contention during insertion into powered backplanes. However, external current-limiting on VCC and proper sequencing of OE assertion after power stabilization are still required per TI design guidelines for full hot-swap compliance.
Can SN74ABT541BDBR drive 50-Ω transmission lines directly?
SN74ABT541BDBR can drive 50-Ω transmission lines directly in short-run configurations (<10 cm) due to its 64-mA IOL and 32-mA IOH drive strength. For longer traces or impedance-controlled routing, series termination (22–33 Ω) at the driver output is recommended to suppress reflections. Ground bounce remains below 1 V per TI characterization, preserving signal integrity.
What is the maximum clock frequency supported by SN74ABT541BDBR in a bus application?
SN74ABT541BDBR does not operate on a clock; it is a combinatorial buffer. Its usable data rate depends on propagation delay and system timing margins. With tPHL/tPLH ≤ 3.9 ns and output skew <0.5 ns, it reliably supports asynchronous bus cycles up to 25 MHz (40 ns period) and synchronous interfaces up to 30 MHz when paired with appropriate setup/hold timing allowances.
Is SN74ABT541BDBR pin-compatible with older SN74ABT541 variants?
Yes, SN74ABT541BDBR shares identical pinout and electrical specifications with other SN74ABT541B variants in DB, DW, PW, and N packages. The "B" suffix denotes improved AC characteristics and enhanced latch-up immunity over pre-B versions. Mechanical compatibility is confirmed across all 20-pin packages listed in TI's SCBS093L datasheet.
SN74ABT541BDBR 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:
- 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
SN74ABT541BDBR FAQ
1.How can I place an order for SN74ABT541BDBR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT541BDBR 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 SN74ABT541BDBR reliable?
The price and inventory of SN74ABT541BDBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT541BDBR is usually 5 days.
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4.How is shipping managed for SN74ABT541BDBR?
SN74ABT541BDBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT541BDBR 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 SN74ABT541BDBR?
For technical support, including SN74ABT541BDBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT541BDBR requirements.
6.How does Aetrix verify that SN74ABT541BDBR is sourced from the original manufacturer or authorized distributors?
All SN74ABT541BDBR 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 SN74ABT541BDBR meets industry standards.
7.What is the process for return or replacement of SN74ABT541BDBR?
All SN74ABT541BDBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT541BDBR, 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 SN74ABT541BDBR part is unused and in its original packaging.
Return procedure for SN74ABT541BDBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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