My Inquiry
My Account
Texas Instruments SN74BCT29863BDWR
- Part No.:
- SN74BCT29863BDWR
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74BCT29863BDWR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,698
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74BCT29863BDWR from Texas Instruments is a 9-bit BiCMOS bus transceiver with dual-directional data flow control, 5 V supply operation, 7.5 ns max propagation delay, and high-impedance power-up state-used in asynchronous bus interfacing between microprocessor and peripheral subsystems.
For engineers reviewing the SN74BCT29863BDWR datasheet, SN74BCT29863BDWR pinout, SN74BCT29863BDWR application, or SN74BCT29863BDWR equivalent, key selection criteria include bidirectional OE-controlled bus isolation, TTL-compatible input thresholds, 96 mA sink capability, and SOIC-24 package compatibility for legacy board upgrades.
Technical Context
This device implements dual independent output-enable controls (OEABx and OEBAx) to configure data direction per channel group, enabling flexible timing in mixed-speed bus systems. Its BiCMOS design reduces standby current (ICCZ) while maintaining TTL-level input compatibility and CMOS-level output drive strength.
The transceiver supports latch mode (both OEAB and OEBA low), A→B or B→A transmission, and full bus isolation-all determined by logic states on four enable inputs. Outputs remain high-impedance during power-up/down, preventing bus contention in hot-swap or reset scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures stable operation across standard 5 V rail tolerances without regulation overhead. |
| Propagation Delay | Max 7.5 ns (tPHL/tPLH) at 5 V/50 pF - enables reliable timing in 100+ MHz bus cycles with margin. |
| Output Drive | 96 mA sink (IOL), 24 mA source (IOH) - drives heavy capacitive loads and multiple TTL inputs directly. |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V - matches standard TTL logic families for seamless interface without level shifters. |
| Power-Up State | Outputs high-impedance - eliminates bus conflicts during system initialization or brownout recovery. |
| ESD Rating | >2000 V HBM - meets MIL-STD-883C for robust handling in manufacturing and field service environments. |
Pinout & Package
SN74BCT29863BDWR uses a 24-pin SOIC (DW) package with 300-mil width, 1.27 mm pitch, and tape-and-reel or tube delivery options. Pin 12 is GND; Pin 24 is VCC; pins 1–9 and 13–21 are bidirectional I/O; pins 10–11 and 22–23 are OE control inputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3–9 | A-bus I/O | Bidirectional data terminals for A-side bus connection; internally isolated when OEBAx inactive. |
| 13–21 | B-bus I/O | Bidirectional data terminals for B-side bus; driven only when OEABx active and direction enabled. |
| 10, 11 | OEBA1, OEBA2 | Enable A→B transmission or latch mode when both low; high-impedance if either high. |
| 22, 23 | OEAB1, OEAB2 | Enable B→A transmission or latch mode when both low; high-impedance if either high. |
| 12 | GND | Ground reference for all I/O and internal logic; must be low-inductance connection to minimize noise coupling. |
| 24 | VCC | 5 V supply input; requires local 0.1 µF ceramic decoupling adjacent to pin for switching noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent OE control pairs | Enables selective A↔B direction per channel group without global bus lock, supporting partial updates in multi-drop systems. |
| BiCMOS process technology | Reduces ICCZ to ≤12 mA (typical 6.5 mA) vs. bipolar-only equivalents-critical for low-power standby modes. |
| Power-up high-impedance outputs | Prevents back-driving or contention on live buses during cold start, warm reset, or power sequencing mismatches. |
| TTL-compatible input thresholds | Accepts standard 5 V TTL logic levels directly-no external biasing or level translation required for legacy controller interfaces. |
Applications
| Industrial PLC Backplane Interface | Legacy Microprocessor Bus Extension |
|---|---|
Use Scenario: Interfacing a modern FPGA-based I/O module to an aging 80C188 CPU backplane with 9-bit address/data multiplexing. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing data flow direction under CPU control signals, with sub-8 ns timing margin for 12 MHz bus clock. Use Value: Eliminates need for discrete logic or dual unidirectional buffers, reducing component count and layout complexity on space-constrained carrier boards. | Use Scenario: Adding memory-mapped peripherals to a 1990s-era industrial controller using a 5 V ISA-like bus architecture. IC Role / Device Role / Timing Role: Isolating and translating between processor and peripheral address/data lines, with OE-driven direction control synchronized to WR/RD strobes. Use Value: Maintains signal integrity across 15 cm trace lengths while meeting setup/hold timing via guaranteed 7.5 ns max tPLH/tPHL. |
| Test Equipment Data Acquisition Bus | Automated Test System (ATE) Fixture Interface |
Use Scenario: Routing sensor data from multiple analog front-ends to a central digitizer in modular benchtop instrumentation. IC Role / Device Role / Timing Role: Synchronizing burst-mode data transfers between isolated subsystems using latch mode (OEABx/OEBAx low) for glitch-free capture. Use Value: Enables deterministic sampling window alignment without external latches or clock domain crossing logic. | Use Scenario: Adapting DUT interface signals between tester channel cards and non-standard DUT pinouts in semiconductor final test handlers. IC Role / Device Role / Timing Role: Level-shifting and direction-controlling parallel test vectors while preserving signal edge rates for timing-critical parametric tests. Use Value: Supports 100 kV/s vector throughput with <10 ns skew across all 9 bits-meeting IEEE 1149.1 boundary-scan timing compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 9-bit bidirectional bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT29863DWR | AC-family; 3.3 V compatible (VCC = 4.5–5.5 V), lower ICCZ (≤5 mA), faster tPLH/tPHL (max 5.5 ns) | Requires tighter VCC tolerance; not drop-in for legacy 5 V-only designs with marginal noise margins | Select when upgrading to lower-power, higher-speed systems where 3.3 V logic compatibility is acceptable. |
| 74F29863N | F-family; bipolar-only; higher ICCZ (up to 45 mA), slower propagation (max 10 ns), no power-up Hi-Z guarantee | Lacks inherent power-up isolation-requires external pull-downs or sequenced enable to avoid bus contention | Select only for cost-sensitive, non-critical applications where board-level mitigation of startup glitches is feasible. |
Compared with SN74BCT29863BDWR, SN74ACT29863DWR offers superior speed and efficiency but demands stricter supply regulation, while 74F29863N sacrifices reliability in power sequencing for lower unit cost-making SN74BCT29863BDWR the balanced choice for robust 5 V legacy integration.
Availability
SN74BCT29863BDWR is available at Aetrix Electronics and suitable for industrial PLC backplanes, legacy microprocessor bus extensions, and automated test equipment requiring stable component supply across extended product lifecycles.
Supply support for SN74BCT29863BDWR 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74BCT29863BDWR belongs to TI's BCT (Bipolar-CMOS Transceiver) logic family, designed specifically for high-drive, low-noise, bidirectional bus interfacing in 5 V systems with strict power-up safety requirements.
FAQ
What is the maximum operating temperature range for the SN74BCT29863BDWR?
The SN74BCT29863BDWR is characterized for operation from 0°C to 70°C, matching commercial-grade requirements. It is not rated for extended temperature ranges like the military-grade SN54BCT29863B (−55°C to 125°C). Thermal derating is not specified beyond this range, and operation outside 0°C–70°C may result in undefined timing or output behavior. Always verify ambient and junction temperatures against the device's power dissipation profile when deployed in enclosed or high-airflow environments. The SN74BCT29863BDWR datasheet confirms this rating under Recommended Operating Conditions.
Does the SN74BCT29863BDWR support true bidirectional data flow without external direction control logic?
Yes, the SN74BCT29863BDWR supports true bidirectional data flow using its four dedicated output-enable inputs (OEAB1, OEAB2, OEBA1, OEBA2). When OEABx pins are active low and OEBAx pins are high, data flows from B to A; when OEBAx pins are low and OEABx pins are high, data flows from A to B. Both sets low enable latch mode. This eliminates need for external direction-control gates or microcontroller GPIO toggling. The SN74BCT29863BDWR function table explicitly defines these states without requiring auxiliary logic.
Is the SN74BCT29863BDWR pin-compatible with the SN74ALS29863N?
No, the SN74BCT29863BDWR is not pin-compatible with SN74ALS29863N. While functionally equivalent per datasheet claims, the ALS version uses a 24-pin PDIP (NT) package with different pin assignments-specifically, GND and VCC locations differ, and OE control pin mapping is inconsistent. The SN74BCT29863BDWR uses SOIC-DW packaging with defined top-view pinout (GND at Pin 12, VCC at Pin 24), whereas SN74ALS29863N places GND at Pin 10 and VCC at Pin 20. Direct replacement requires PCB redesign.
What is the purpose of the dual OE inputs (e.g., OEAB1 and OEAB2) on the SN74BCT29863BDWR?
The dual OE inputs (OEAB1/OEAB2 and OEBA1/OEBA2) provide redundancy and noise immunity: both must be low to activate the corresponding direction path. This prevents false triggering from single-line noise spikes or ground bounce. It also allows flexible control-either OE input can be tied to a system enable signal while the other serves as a local override. The SN74BCT29863BDWR datasheet specifies that "X" in the function table means the state of that input is irrelevant, confirming logical AND behavior. This design enhances reliability in electrically noisy industrial environments.
Can the SN74BCT29863BDWR be used with 3.3 V logic systems?
The SN74BCT29863BDWR is not recommended for direct use with 3.3 V logic systems. Its input thresholds (VIH = 2.0 V, VIL = 0.8 V) and output swing (VOH ≥ 2.4 V at 5 V VCC) are optimized for 5 V TTL compatibility. Driving it from 3.3 V outputs risks marginal VIH margin, and connecting its 5 V outputs to 3.3 V inputs violates absolute maximum ratings unless external clamping or level-shifting is implemented. For 3.3 V systems, TI recommends SN74ACT29863DWR instead. The SN74BCT29863BDWR datasheet specifies VCC = 4.5–5.5 V only.
SN74BCT29863BDWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74BCT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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, 48mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
SN74BCT29863BDWR FAQ
1.How can I place an order for SN74BCT29863BDWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74BCT29863BDWR 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 SN74BCT29863BDWR reliable?
The price and inventory of SN74BCT29863BDWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74BCT29863BDWR is usually 5 days.
3.What payment methods are accepted for SN74BCT29863BDWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74BCT29863BDWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74BCT29863BDWR?
SN74BCT29863BDWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74BCT29863BDWR 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 SN74BCT29863BDWR?
For technical support, including SN74BCT29863BDWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74BCT29863BDWR requirements.
6.How does Aetrix verify that SN74BCT29863BDWR is sourced from the original manufacturer or authorized distributors?
All SN74BCT29863BDWR 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 SN74BCT29863BDWR meets industry standards.
7.What is the process for return or replacement of SN74BCT29863BDWR?
All SN74BCT29863BDWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74BCT29863BDWR, 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 SN74BCT29863BDWR part is unused and in its original packaging.
Return procedure for SN74BCT29863BDWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74BCT29863BDWR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
