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Texas Instruments SN74ABT16541ADL
- Part No.:
- SN74ABT16541ADL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16541ADL.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:142
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Product details
Overview
SN74ABT16541ADL from Texas Instruments is a noninverting 16-bit buffer/driver with 3-state outputs, composed of two independent 8-bit sections each with dual output-enable inputs (OE1/OE2), rated for –40°C to 85°C operation, featuring high-drive capability (–32 mA IOH / 64 mA IOL), and housed in a 48-pin SSOP (DL) package. It serves as a bus interface and level-shifting driver in high-speed digital backplanes and memory subsystems.
For engineers reviewing the SN74ABT16541ADL datasheet, SN74ABT16541ADL pinout, SN74ABT16541ADL application, or SN74ABT16541ADL equivalent, key selection considerations include its dual-section 3-state control logic, ±100 µA off-state leakage, 1–3.4 ns propagation delay at 5 V, and compatibility with 5-V TTL/CMOS systems requiring robust noise immunity and board-level signal integrity.
Technical Context
This device implements a flow-through architecture with distributed VCC/GND pins to minimize switching noise, and uses EPIC-IIB BiCMOS process technology to achieve low power dissipation while maintaining high-speed performance. Each 8-bit section requires both OE1 and OE2 asserted low to enable outputs; either high disables that section into high-impedance state.
It supports hot-insertion safe operation via pullup-biased OE inputs, exhibits latch-up immunity exceeding 500 mA per JESD-17, and delivers <0.8 V typical output ground bounce (VOLP) at VCC = 5 V and TA = 25°C - critical for stable multi-load bus driving.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL logic rails and margin against supply droop. |
| Output Drive | –32 mA IOH / 64 mA IOL - enables direct drive of multiple TTL loads or transmission-line termination without external buffers. |
| Propagation Delay | 1 ns (min) to 3.4 ns (max) at CL = 50 pF - supports >100 MHz bus clocking in synchronous data paths. |
| Off-State Leakage | ±100 µA Ioff - guarantees minimal current draw and signal contamination when outputs are disabled. |
| Input Hysteresis | 100 mV - improves noise margin on slow-rising or noisy control lines like OE. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems and communications equipment. |
| Package Thermal Impedance | 94°C/W θJA (DL package) - defines maximum power dissipation limit under natural convection cooling. |
Pinout & Package
The SN74ABT16541ADL is packaged in a 48-pin Shrink Small-Outline Package (SSOP, DL), 300-mil body width, 0.5-mm lead pitch, with gull-wing leads and exposed thermal pad not present. Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE1, 1OE2, 2OE1, 2OE2 | Section Output Enable Inputs | Active-low dual controls per 8-bit section - both must be low to enable Y outputs; prevents partial enable glitches. |
| 1A1–1A8, 2A1–2A8 | Data Inputs | Noninverting inputs for respective 8-bit sections - directly connected to upstream data sources or address latches. |
| 1Y1–1Y8, 2Y1–2Y8 | 3-State Outputs | High-drive buffered outputs - enter high-Z when any OE is high, enabling shared bus arbitration. |
| VCC (Pins 7, 18, 29, 40) | Power Supply | Distributed VCC pins reduce simultaneous switching noise and improve PDN impedance across the die. |
| GND (Pins 4, 10, 15, 22, 27, 34, 43, 46) | Ground Reference | Eight GND pins provide low-inductance return paths and support clean signal integrity for all 16 channels. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Input-to-output signal path runs left-to-right across package - simplifies PCB routing and minimizes trace crossovers. |
| EPIC-IIB BiCMOS process | Combines bipolar speed with CMOS low static power - achieves 32 mA drive without excessive ICC quiescent current. |
| Dual OE per section | Enables hierarchical bus control - e.g., one OE for global enable, second for local subsection gating. |
| Output ground bounce < 0.8 V | Ensures stable logic thresholds during heavy capacitive switching - critical for reliable multi-drop bus operation. |
| Latch-up immunity > 500 mA | Meets JEDEC JESD-17 - allows safe use in mixed-signal environments with transient coupling risks. |
Applications
| Memory Interface Buffering | Backplane Data Bus Driver |
|---|---|
Use Scenario: Driving parallel address/data buses between microprocessor and SRAM/Flash arrays in industrial controllers. IC Role / Device Role / Timing Role: Noninverting 16-bit buffer with independent 3-state control per byte lane - isolates CPU from memory load capacitance and enables multi-master arbitration. Use Value: 64 mA IOL drives 10+ TTL loads per output, while 1–3.4 ns tPLH/tPHL maintains setup/hold timing margins at 25 MHz bus rates. | Use Scenario: Interfacing FPGA I/O banks to legacy 5-V parallel backplanes in test equipment or telecom line cards. IC Role / Device Role / Timing Role: Level-translating bus driver with hot-swap compatible OE biasing - provides voltage-domain bridging and fault-isolated bus segments. Use Value: Dual OE per section allows dynamic reconfiguration of bus segments without full system reset; ±100 µA Ioff prevents leakage-induced false reads. |
| Industrial PLC I/O Expansion | Legacy ISA Bus Repeater |
Use Scenario: Extending parallel I/O capacity in programmable logic controllers using modular carrier boards. IC Role / Device Role / Timing Role: High-noise-immunity buffer with 100 mV input hysteresis - conditions slow or noisy control signals from relay drivers or optocouplers. Use Value: Distributed VCC/GND pins suppress ground bounce in electrically noisy factory environments; –40°C to +85°C rating ensures field reliability. | Use Scenario: Repeating 16-bit ISA bus signals between motherboard and expansion mezzanine in retro-computing or embedded diagnostics hardware. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional repeater - used in conjunction with direction-control logic to isolate bus segments and restore signal integrity. Use Value: 32 mA IOH sustains valid VOH over long traces; flow-through layout matches ISA slot pin mapping for minimal layer count on 2-layer carrier PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT162244ADLR | Inverting output polarity; identical pinout, drive strength, and timing specs. | Requires logic inversion in upstream/downstream logic; unsuitable where signal polarity must be preserved. | Select only if system-level inversion is acceptable or compensated elsewhere in the data path. |
| SN74LVC16244ADGGR | 3.3-V only operation (1.65–3.6 V); lower drive (–24 mA / 24 mA); smaller TSSOP-48 package. | Not interoperable with 5-V buses; requires level-shifting for mixed-voltage systems. | Choose for new 3.3-V designs prioritizing lower power and footprint; avoid for 5-V legacy bus interfaces. |
Compared with SN74ABT162244ADLR and SN74LVC16244ADGGR, the SN74ABT16541ADL uniquely supports 5-V operation with noninverting logic and highest drive strength, making it the only option for noise-critical, high-fanout 5-V bus buffering without polarity change or voltage translation.
Availability
SN74ABT16541ADL is available at Aetrix Electronics and suitable for industrial PLCs, memory subsystems, backplane interconnects, and legacy bus repeaters requiring stable component supply across extended product lifecycles.
Supply support for SN74ABT16541ADL 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 U.S.-based semiconductor company specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74ABT16541ADL belongs to TI's Widebus™ family of high-speed bus-interface logic, designed specifically for robust, low-noise data transfer in 5-V digital systems with demanding fanout and timing requirements.
FAQ
What is the recommended power-up sequence for SN74ABT16541ADL to ensure outputs remain in high-impedance state?
TI recommends tying all OE inputs (1OE1, 1OE2, 2OE1, 2OE2) to VCC through a pullup resistor during power-up and power-down. The minimum resistor value depends on the driver's current-sinking capability; a 10-kΩ resistor is commonly used. This ensures outputs stay in high-impedance until firmware asserts valid OE logic, preventing bus contention. The SN74ABT16541ADL does not include internal power-on reset circuitry, so external biasing is mandatory for safe initialization.
Can SN74ABT16541ADL drive a 50-pF load at 50 MHz without signal degradation?
Yes - the SN74ABT16541ADL is characterized with CL = 50 pF and delivers tPLH/tPHL ≤ 3.4 ns at VCC = 5 V and TA = 25°C, supporting clean edges up to ~100 MHz fundamental frequency. Its –32 mA/64 mA drive strength ensures fast edge rates and low overshoot, and distributed VCC/GND pins minimize simultaneous switching noise. For sustained 50 MHz operation, maintain controlled-impedance routing and proper decoupling near each VCC pin as specified in the SN74ABT16541ADL layout guidelines.
Does SN74ABT16541ADL support hot-swap insertion into a live 5-V bus?
The SN74ABT16541ADL supports hot-swap operation when OE inputs are properly biased to VCC via pullup resistors before VCC ramp-up, and when bus signals are slew-rate limited. Its ±100 µA off-state leakage (Ioff) and latch-up immunity >500 mA per JESD-17 reduce risk of damage or corruption during insertion. However, TI does not guarantee hot-swap compliance without external current-limiting or sequencing circuitry - the SN74ABT16541ADL itself is not hot-swap certified but is widely deployed in such applications with appropriate system-level protection.
What is the maximum continuous output current per pin for SN74ABT16541ADL under worst-case thermal conditions?
The absolute maximum continuous output current per pin for SN74ABT16541ADL is 64 mA (IOL) and –32 mA (IOH), as specified in recommended operating conditions. However, sustained operation at these levels in the DL package (θJA = 94°C/W) requires careful thermal design: at TA = 85°C and VCC = 5.5 V, total ICC can reach 34 mA, and power dissipation must remain below ~350 mW to avoid junction temperature exceeding 125°C. Derating is required above 70°C ambient; consult the SN74ABT16541ADL thermal curves for precise limits.
How does the dual-OE architecture of SN74ABT16541ADL improve bus arbitration compared to single-OE 16-bit buffers?
The dual-OE architecture (1OE1/1OE2 per 8-bit section) enables granular control - for example, one OE can serve as global enable while the other acts as local channel gate, allowing partial bus activation without disturbing adjacent lanes. This reduces switching noise, avoids unnecessary power spikes, and supports time-multiplexed access schemes. In contrast, single-OE buffers force all 16 bits to switch simultaneously, increasing ground bounce and EMI. The SN74ABT16541ADL's architecture is explicitly optimized for this behavior, as confirmed by its function table and flow-through layout.
SN74ABT16541ADL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- 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:
- 48-SSOP
SN74ABT16541ADL FAQ
1.How can I place an order for SN74ABT16541ADL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16541ADL 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 SN74ABT16541ADL reliable?
The price and inventory of SN74ABT16541ADL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16541ADL is usually 5 days.
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SN74ABT16541ADL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT16541ADL 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 SN74ABT16541ADL?
For technical support, including SN74ABT16541ADL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16541ADL requirements.
6.How does Aetrix verify that SN74ABT16541ADL is sourced from the original manufacturer or authorized distributors?
All SN74ABT16541ADL 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 SN74ABT16541ADL meets industry standards.
7.What is the process for return or replacement of SN74ABT16541ADL?
All SN74ABT16541ADL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16541ADL, 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 SN74ABT16541ADL part is unused and in its original packaging.
Return procedure for SN74ABT16541ADL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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