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Texas Instruments SN74LVC863ADBR
- Part No.:
- SN74LVC863ADBR
- Manufacturer:
- Texas Instruments
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVC863ADBR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,655
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Product details
Overview
SN74LVC863ADBR from Texas Instruments is a 9-bit bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between A and B buses in mixed-voltage systems. It operates from 1.65 V to 3.6 V, accepts 5.5-V inputs, delivers 6.1-ns max propagation delay at 3.3 V, and supports partial-power-down via Ioff. It enables voltage translation in 3.3-V/5-V interfacing applications such as industrial backplane communication.
For engineers reviewing the SN74LVC863ADBR datasheet, SN74LVC863ADBR pinout, SN74LVC863ADBR application, or SN74LVC863ADBR equivalent, key selection criteria include bidirectional 3-state control logic (OEAB/OEBA), mixed-mode input tolerance, Ioff-enabled power-down isolation, and TSSOP-24 package compatibility with high-density PCB layouts.
Technical Context
This device implements dual independent 3-state enable control per direction: OEAB1/OEAB2 govern A→B transmission, while OEBA1/OEBA2 govern B→A transmission. Each pair allows fine-grained channel gating, supporting latch, isolate, or directional pass-through modes per function table.
Its Ioff circuitry actively disables outputs during power-down, blocking reverse current flow even when VCC = 0 V and I/O pins are driven externally. Input structures tolerate up to 5.5 V regardless of VCC level, enabling safe interfacing between 3.3-V logic and legacy 5-V peripherals without external level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across low-voltage logic families including 1.8-V and 3.3-V systems. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct connection to 5-V drivers without clamping diodes or external protection. |
| Max Propagation Delay | 6.1 ns at VCC = 3.3 V - Supports >100-MHz bus timing in high-speed digital interfaces. |
| Ioff Current | ±10 µA at VI/VO = 5.5 V - Ensures robust isolation during partial power-down, preventing backfeed damage. |
| Output Drive Strength | ±24 mA at VCC = 3 V - Drives standard CMOS loads and short traces without buffering. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - Meets industrial-grade reliability requirements per JESD22. |
| Operating Temperature | –40°C to +85°C - Qualified for extended industrial ambient conditions. |
Pinout & Package
TSSOP-24 package (PW suffix), 0.65-mm pitch, 4.4-mm width, 1.2-mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OEBA1 | Active-low enable for B→A direction on first group of channels. |
| 2 | A1 | Data input/output terminal for A-bus bit 1. |
| 3 | A2 | Data input/output terminal for A-bus bit 2. |
| 4 | A3 | Data input/output terminal for A-bus bit 3. |
| 5 | A4 | Data input/output terminal for A-bus bit 4. |
| 6 | A5 | Data input/output terminal for A-bus bit 5. |
| 7 | A6 | Data input/output terminal for A-bus bit 6. |
| 8 | A7 | Data input/output terminal for A-bus bit 7. |
| 9 | A8 | Data input/output terminal for A-bus bit 8. |
| 10 | A9 | Data input/output terminal for A-bus bit 9. |
| 11 | OEBA2 | Active-low enable for B→A direction on second group (shared with OEAB2). |
| 12 | GND | Ground reference for all internal circuitry and I/O structures. |
| 13 | VCC | Primary supply rail for logic core and output drivers (1.65–3.6 V). |
| 14 | B1 | Data input/output terminal for B-bus bit 1. |
| 15 | B2 | Data input/output terminal for B-bus bit 2. |
| 16 | B3 | Data input/output terminal for B-bus bit 3. |
| 17 | B4 | Data input/output terminal for B-bus bit 4. |
| 18 | B5 | Data input/output terminal for B-bus bit 5. |
| 19 | B6 | Data input/output terminal for B-bus bit 6. |
| 20 | B7 | Data input/output terminal for B-bus bit 7. |
| 21 | B8 | Data input/output terminal for B-bus bit 8. |
| 22 | B9 | Data input/output terminal for B-bus bit 9. |
| 23 | OEAB2 | Active-low enable for A→B direction on second group (shared with OEBA2). |
| 24 | OEAB1 | Active-low enable for A→B direction on first group of channels. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | Accepts 5-V inputs while powered from 1.65–3.6 V - eliminates external level translators in 3.3/5-V mixed systems. |
| Dual independent direction controls | Separate OEABx and OEBAx pairs allow concurrent A→B and B→A data flow control - improves bus arbitration flexibility. |
| Ioff partial-power-down support | Outputs disable automatically when VCC = 0 V - prevents current backflow and protects powered-down subsystems. |
| Low ground bounce (VOLP) | Typical <0.8 V at VCC = 3.3 V - reduces noise coupling into shared ground planes during switching. |
| High noise immunity | VIH/VIL thresholds scale with VCC (e.g., VIH = 0.65×VCC min) - maintains reliable logic detection across supply range. |
Applications
| Industrial Backplane Interface | Legacy Peripheral Bridging |
|---|---|
Use Scenario: Connecting a 3.3-V FPGA-based controller to a 5-V industrial I/O module over a shared parallel bus. IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver managing data flow direction and isolation during reset sequences. Use Value: Eliminates discrete level-shifter components while maintaining timing integrity (<6.1 ns tpd) and ensuring safe 5-V-to-3.3-V interface compliance. |
Use Scenario: Interfacing a modern microcontroller unit (MCU) with 3.3-V GPIO to legacy 5-V RS-232 or parallel printer controllers. IC Role / Device Role / Timing Role: Asynchronous bus translator providing direction-controlled data path and high-impedance isolation during MCU sleep states. Use Value: Leverages Ioff to prevent backfeed into unpowered MCU ports and withstands 5.5-V input transients without damage. |
| Modular PLC Communication | Test Equipment Signal Routing |
Use Scenario: Enabling hot-swappable I/O modules in programmable logic controllers where modules may be inserted/removed under partial power. IC Role / Device Role / Timing Role: Isolation gate for data bus segments, activated only when both module and backplane are fully powered. Use Value: Ioff ensures no current flows through SN74LVC863ADBR when either side loses VCC, satisfying IEC 61000-4-5 surge safety requirements. |
Use Scenario: Configurable signal routing matrix in automated test equipment (ATE) that routes DUT signals between multiple instrument channels. IC Role / Device Role / Timing Role: Reconfigurable 9-bit bidirectional switch controlled by FPGA logic to establish dynamic signal paths. Use Value: Dual OE control allows independent gating of transmit/receive lanes, reducing FPGA pin count and simplifying routing firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 9-bit bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC863APWR | Same silicon die, identical electrical specs, TSSOP-24 package with 16.4-mm width vs. 4.4-mm width of SN74LVC863ADBR. | Requires larger PCB footprint and different land pattern; not interchangeable without layout revision. | Select SN74LVC863APWR only if existing design uses wider TSSOP variant or requires alternate reel packaging (2000 pcs/reel). |
| SN74LVC863ADGVR | Same functionality and specs, but in TVSOP-24 (DGV) package: 3.6-mm width, 0.5-mm pitch, thinner profile (1.0 mm max height). | Offers higher density placement and improved thermal performance (θJA = 86°C/W vs. 88°C/W), suitable for space-constrained designs. | Choose SN74LVC863ADGVR for ultra-compact layouts or when lower profile is required; verify stencil design for 0.5-mm pitch. |
Compared with SN74LVC863ADBR, SN74LVC863APWR demands more board area and SN74LVC863ADGVR requires finer-pitch assembly - both retain identical logic behavior and voltage translation capability, making them functional alternatives only when package constraints align.
Availability
SN74LVC863ADBR is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy peripheral bridging, modular PLC communication, and test equipment signal routing requiring stable component supply and long-term manufacturability.
Supply support for SN74LVC863ADBR 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 experience in industrial-grade interface ICs.
The SN74LVC863A family was developed to address voltage-level interoperability challenges in mixed-supply systems, targeting high-reliability industrial, automation, and instrumentation applications.
FAQ
What is the maximum operating frequency supported by SN74LVC863ADBR?
The SN74LVC863ADBR does not specify a maximum clock frequency, as it is an asynchronous transceiver. Its 6.1-ns max propagation delay at 3.3 V supports data rates exceeding 100 MHz in properly terminated, low-skew bus implementations. System-level timing depends on board layout, load capacitance, and driver strength - always validate with actual trace lengths and termination schemes.
Can SN74LVC863ADBR be used for unidirectional data transfer?
Yes, SN74LVC863ADBR supports unidirectional operation: tie OEAB1/OEAB2 low and OEBA1/OEBA2 high to enable A→B only, or vice versa. All nine channels operate simultaneously in the selected direction, with outputs entering high-impedance state when their respective OE pair is deasserted.
Does SN74LVC863ADBR require external pull-up resistors on OE pins?
Yes - to ensure defined high-impedance state during power-up/power-down, TI recommends tying OEAB1, OEAB2, OEBA1, and OEBA2 to VCC via pull-up resistors. Minimum resistance is determined by the driving source's current-sinking capability; typical values range from 4.7 kΩ to 10 kΩ for standard logic drivers.
Is SN74LVC863ADBR compatible with 1.8-V-only systems?
Yes, SN74LVC863ADBR is fully specified down to 1.65 V VCC and functions reliably at 1.8 V. Input thresholds scale with VCC (VIH ≥ 0.65×VCC), ensuring noise margins remain adequate. Output drive strength decreases at lower VCC, but ±8 mA at 1.8 V suffices for most 1.8-V CMOS loads.
How does the Ioff feature protect circuits during partial power-down?
The Ioff feature in SN74LVC863ADBR disables all outputs when VCC = 0 V, limiting leakage current to ±10 µA even if external signals are applied to A/B pins. This prevents damaging reverse current flow into a powered-down section of the system - critical for hot-plug and modular power architectures.
SN74LVC863ADBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 9
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
SN74LVC863ADBR FAQ
1.How can I place an order for SN74LVC863ADBR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC863ADBR 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 SN74LVC863ADBR reliable?
The price and inventory of SN74LVC863ADBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC863ADBR is usually 5 days.
3.What payment methods are accepted for SN74LVC863ADBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC863ADBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC863ADBR?
SN74LVC863ADBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC863ADBR 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 SN74LVC863ADBR?
For technical support, including SN74LVC863ADBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC863ADBR requirements.
6.How does Aetrix verify that SN74LVC863ADBR is sourced from the original manufacturer or authorized distributors?
All SN74LVC863ADBR 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 SN74LVC863ADBR meets industry standards.
7.What is the process for return or replacement of SN74LVC863ADBR?
All SN74LVC863ADBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC863ADBR, 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 SN74LVC863ADBR part is unused and in its original packaging.
Return procedure for SN74LVC863ADBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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