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Texas Instruments SN74ABT16863DLR
- Part No.:
- SN74ABT16863DLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16863DLR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,579
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Product details
Overview
SN74ABT16863DLR from Texas Instruments is an 18-bit noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between A and B buses in industrial and embedded systems. It supports dual 9-bit or single 18-bit operation, delivers ±32-mA high-drive outputs (IOH/IOL), operates from 4.5 V to 5.5 V, and is rated for –40°C to 85°C.
For engineers reviewing the SN74ABT16863DLR datasheet, SN74ABT16863DLR pinout, SN74ABT16863DLR application, or SN74ABT16863DLR equivalent, this device is selected for high-speed TTL-compatible bus isolation, power-up/down high-impedance safety, and flow-through PCB layout optimization in backplane and motherboard designs.
Technical Context
The SN74ABT16863DLR implements two independent 9-bit transceiver sections, each controlled by dedicated OEAB/OEBA inputs enabling direction-selectable data flow (A↔B) without external timing logic. Its EPIC-IIB BiCMOS process ensures low ground bounce (VOLP < 1 V) and latch-up immunity (>500 mA per JESD-17).
Distributed VCC/GND pins minimize switching noise; the flow-through pinout reduces trace crossovers. Power sequencing is robust: high-impedance state is guaranteed at VCC ≤ 2.1 V, and pullup resistors on OE pins ensure safe disable above that threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 4.5 V to 5.5 V - compatible with standard 5-V TTL systems and tolerant of rail variation. |
| Output Drive (IOH/IOL) | –32 mA / 64 mA - drives heavy capacitive loads and multiple TTL inputs without buffering. |
| Propagation Delay (tPLH/tPHL) | 1 ns (min) to 3.5 ns (max) at 5 V - enables >200-MHz bus operation with tight timing margins. |
| Input Thresholds (VIH/VIL) | 2.0 V / 0.8 V - fully TTL-compatible input logic levels for seamless integration. |
| Power-Up/Down State | High-impedance below 2.1 V - prevents bus contention during supply ramping or brownout. |
| Thermal Resistance (θJA) | 74 °C/W (DL package) - supports sustained operation at full drive in compact industrial enclosures. |
| Operating Temperature | –40°C to +85°C - qualified for extended-temperature industrial control and telecom equipment. |
Pinout & Package
SN74ABT16863DLR is housed in a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, with 0.65-mm lead pitch and Q1 pin-1 quadrant orientation in tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | Output Enable Controls | Active-low enables for each 9-bit section; OEAB enables B→A, OEBA enables A→B. |
| 1A1–1A9, 2A1–2A9 | Port A Data Inputs/Outputs | First and second 9-bit A-side bidirectional I/O channels; internally noninverting. |
| 1B1–1B9, 2B1–2B9 | Port B Data Inputs/Outputs | First and second 9-bit B-side bidirectional I/O channels; internally noninverting. |
| VCC (Pins 7, 22, 35, 46) | Power Supply | Distributed VCC pins reduce simultaneous switching noise and improve PDN stability. |
| GND (Pins 4, 11, 14, 15, 25, 32, 39, 42, 43, 50) | Ground Return | 10 dedicated GND pins provide low-inductance return paths for all 18 drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins aligned on opposite sides (e.g., A1→B1 on same vertical axis) to eliminate layer jumps and reduce signal skew. |
| High-impedance during power transition | Guaranteed Hi-Z when VCC < 2.1 V eliminates bus conflicts at power-on/off without external reset sequencing. |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS density to achieve 3.5-ns max propagation delay with 2-mA ICC quiescent current. |
| Low ground bounce (VOLP) | Typical <1 V at VCC = 5 V - maintains signal integrity under heavy switching across all 18 outputs. |
| Latch-up immunity | Exceeds 500 mA per JEDEC JESD-17 - ensures robustness in noisy industrial environments with ESD or surge events. |
Applications
| Industrial Backplane Interface | Embedded Controller Expansion Bus |
|---|---|
Use Scenario: Isolating CPU local bus from peripheral expansion slots in programmable logic controllers (PLCs) with hot-swap capability. IC Role / Device Role / Timing Role: Bidirectional 18-bit transceiver managing address/data multiplexing between ARM Cortex-M7 and FPGA-based I/O modules. Use Value: Flow-through pinout enables direct layer routing; high-drive outputs drive 15-cm FR4 traces with 100-pF load while maintaining <3.5-ns skew. |
Use Scenario: Extending memory-mapped I/O between microcontroller and multi-function sensor hub in factory automation gateways. IC Role / Device Role / Timing Role: Dual 9-bit transceiver sectioning allows independent enable control for analog front-end and digital actuator buses. Use Value: Independent OEAB/OEBA pins eliminate need for external logic gates; power-up Hi-Z prevents spurious writes during boot. |
| Telecom Line Card Interconnect | Test Equipment Data Path Switching |
Use Scenario: Buffering parallel control signals between DSP and ASIC on high-density line cards in access multiplexers. IC Role / Device Role / Timing Role: 18-bit unidirectional repeater (A→B only) with OEBA held low and OEAB controlled by FPGA status register. Use Value: 64-mA IOL drives terminated 50-Ω stubs; distributed VCC/GND suppresses crosstalk across 12+ adjacent channels. |
Use Scenario: Reconfigurable signal routing in automated test equipment (ATE) mainframes handling mixed-voltage DUT interfaces. IC Role / Device Role / Timing Role: Bus isolator enabling safe insertion/removal of daughterboards while main controller remains active. Use Value: Guaranteed Hi-Z below 2.1 V prevents back-driving during hot-plug; 74 °C/W θJA supports continuous 100% duty-cycle operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT162245DLR | 16-bit (not 18-bit); identical DL package, 3.6-ns max tPHL, same 5-V supply and drive strength. | Lacks two data bits; requires redesign if full 18-bit width is mandatory. | Select when system uses 16-bit data paths and board space is constrained-same footprint but lower pin count. |
| SN74LVTH16835DLR | Lower voltage (3.3-V only); 24-mA IOL; LVTH family, not ABT; 5.5-ns max tPHL. | Not 5-V tolerant; incompatible with legacy TTL buses unless level-shifted. | Choose only for new 3.3-V-only designs where power reduction outweighs speed and compatibility trade-offs. |
Compared with SN74ABT162245DLR, the SN74ABT16863DLR provides two additional data lines and tighter timing (3.5 ns vs. 3.6 ns), making it preferable for full-width 18-bit legacy bus extensions. Against SN74LVTH16835DLR, SN74ABT16863DLR offers 5-V compatibility, higher drive, and faster propagation-critical for mixed-voltage industrial backplanes.
Availability
SN74ABT16863DLR is available at Aetrix Electronics and suitable for industrial backplane interfaces, embedded controller expansion buses, and telecom line card interconnects requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74ABT16863DLR 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 interface ICs for industrial and automotive markets.
The SN74ABT16863DLR belongs to TI's Widebus™ family of high-speed bus transceivers, engineered specifically for noise-immune, high-drive, and power-sequencing-safe communication in mission-critical industrial control and communications infrastructure.
FAQ
What is the maximum operating frequency supported by the SN74ABT16863DLR?
The SN74ABT16863DLR does not specify a maximum clock frequency directly, but its propagation delay (tPLH/tPHL) is 1–3.5 ns at 5 V, supporting reliable operation up to approximately 200 MHz in well-terminated, low-skew bus configurations. System-level timing must account for board trace delays and loading, but the SN74ABT16863DLR itself meets requirements for high-speed parallel bus applications such as VME64x and custom industrial backplanes.
Does the SN74ABT16863DLR support hot-swap or live-insertion?
Yes-the SN74ABT16863DLR enters a guaranteed high-impedance state when VCC drops below 2.1 V, preventing bus contention during power-up or power-down. When used with proper OE pin biasing (e.g., pullup resistors), the SN74ABT16863DLR safely isolates A and B buses during hot-plug events in modular systems like PLC I/O carriers and telecom line cards.
Can the SN74ABT16863DLR be used as two independent 9-bit transceivers?
Yes-the SN74ABT16863DLR contains two functionally identical 9-bit sections (1A/1B and 2A/2B), each with dedicated OEAB and OEBA controls. This allows independent direction control: one section can route A→B while the other routes B→A, or both can operate bidirectionally under separate enable logic-enabling flexible partitioning in multi-bus architectures.
What is the meaning of "flow-through architecture" for the SN74ABT16863DLR?
Flow-through architecture means input and corresponding output pins (e.g., 1A1 and 1B1) are placed on opposite edges of the SSOP-DL package in aligned positions. This allows straight PCB trace routing without vias or layer changes, minimizing signal path length, skew, and crosstalk-critical for maintaining timing integrity across all 18 bits in high-speed parallel buses.
Is the SN74ABT16863DLR pin-compatible with other Widebus™ transceivers like the SN74ABT162245?
No-the SN74ABT16863DLR is not pin-compatible with the SN74ABT162245DLR. While both use the DL package, the SN74ABT16863DLR has 56 pins and dual 9-bit sections with four OE inputs, whereas the SN74ABT162245DLR is a 48-pin 16-bit device with two OE inputs. Direct replacement would require PCB layout revision due to differing pin count, signal mapping, and power/ground pin distribution.
SN74ABT16863DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 9
- 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:
- 56-SSOP
SN74ABT16863DLR FAQ
1.How can I place an order for SN74ABT16863DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16863DLR 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 SN74ABT16863DLR reliable?
The price and inventory of SN74ABT16863DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16863DLR is usually 5 days.
3.What payment methods are accepted for SN74ABT16863DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT16863DLR transactions.
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4.How is shipping managed for SN74ABT16863DLR?
SN74ABT16863DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT16863DLR 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 SN74ABT16863DLR?
For technical support, including SN74ABT16863DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16863DLR requirements.
6.How does Aetrix verify that SN74ABT16863DLR is sourced from the original manufacturer or authorized distributors?
All SN74ABT16863DLR 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 SN74ABT16863DLR meets industry standards.
7.What is the process for return or replacement of SN74ABT16863DLR?
All SN74ABT16863DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16863DLR, 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 SN74ABT16863DLR part is unused and in its original packaging.
Return procedure for SN74ABT16863DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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