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Texas Instruments SN74BCT29863BNT
- Part No.:
- SN74BCT29863BNT
- Manufacturer:
- Texas Instruments
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74BCT29863BNT.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,415
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Product details
Overview
SN74BCT29863BNT from Texas Instruments is a 9-bit BiCMOS transceiver for asynchronous bidirectional data bus communication, featuring dual output-enable controls (OEAB1/OEAB2 and OEBA1/OEBA2), 5-V supply operation, 0°C to 70°C temperature range, and high-impedance power-up state-used in industrial backplane and legacy system bus interface applications.
For engineers reviewing the SN74BCT29863BNT datasheet, SN74BCT29863BNT pinout, SN74BCT29863BNT application, or SN74BCT29863BNT equivalent, key selection criteria include bidirectional bus isolation timing (tPZL ≤ 12.6 ns), output drive strength (IOL = 96 mA), BiCMOS ICCZ reduction, and SOIC-24 package compatibility with legacy TTL/LS systems.
Technical Context
This device implements dual independent enable logic for A↔B data flow control, supporting latch, transmit, and isolation modes per its function table. Its BiCMOS architecture enables TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) while delivering CMOS-level output drive and reduced standby current.
Timing behavior is defined by four distinct propagation paths: data path (tPLH/tPHL), and three enable-controlled transitions (tPZH/tPZL/tPHZ/tPLZ). All switching characteristics are specified under 50-pF capacitive load and 500-Ω source impedance conditions per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL/CMOS logic rails and noise margin stability |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade industrial control and embedded computing environments |
| Output Drive (Low) | 96 mA - supports heavy bus loading and fan-out to multiple TTL inputs without external buffers |
| Propagation Delay | 1 ns to 7.5 ns - enables sub-100-MHz bus handshaking in synchronous and asynchronous protocols |
| Input Clamp Current | −18 mA - protects against transient overvoltage events on I/O lines per MIL-STD-883C |
| Power-Up State | High-impedance outputs - prevents bus contention during system reset or hot-insertion sequences |
Pinout & Package
SN74BCT29863BNT is supplied in a 24-pin plastic small-outline integrated circuit (SOIC) package (DW suffix), with 300-mil body width, gull-wing leads, and RoHS-compliant NiPdAu finish. MSL Level-1 rating allows unlimited floor life and reflow at 260°C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9 | A-bus data inputs/outputs | Bidirectional I/O pins for A-side bus connection; internally buffered with BiCMOS drivers |
| 11, 13, 14, 15, 16, 17, 18, 19, 20 | B-bus data inputs/outputs | Bidirectional I/O pins for B-side bus connection; electrically isolated from A side when disabled |
| 10, 12 | GND and VCC | Ground reference and 5-V supply rail; decoupling required within 1 cm of pins for stable switching |
| 21, 22, 23, 24 | OEAB1, OEAB2, OEBA1, OEBA2 | Independent output-enable controls; active-low logic determines direction (A→B or B→A) or isolation mode |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process technology | Reduces ICCZ standby current to 6.5–12 mA versus bipolar-only equivalents, lowering system power in idle states |
| Dual independent OE control | Enables asymmetric bus arbitration-e.g., A→B enabled while B→A held in high-Z for read-modify-write cycles |
| Power-up high-impedance state | Eliminates bus contention during cold start or brownout recovery without external reset sequencing |
| ESD protection | Exceeds 2000 V HBM per MIL-STD-883C Method 3015-supports handling in non-ESD-controlled assembly environments |
Applications
| Industrial Backplane Interface | Legacy System Bus Extension |
|---|---|
Use Scenario: Interfacing a microcontroller-based master card to multiple peripheral cards across a 20-inch PCB backplane with 50-pF trace capacitance. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing data flow between CPU and I/O modules using discrete OE signals for direction control. Use Value: 7.5-ns max tPHL ensures reliable 10-MHz burst transfers; 96-mA drive sustains signal integrity across long traces. | Use Scenario: Extending an aging 8086-based S-100 bus to add new memory-mapped peripherals without modifying existing controller firmware. IC Role / Device Role / Timing Role: Protocol-transparent level translator and bus driver enabling drop-in replacement of obsolete 74ALS29863 devices. Use Value: Functionally identical timing and pinout to ′ALS29863 allows direct PCB reuse; BiCMOS reduces heat in dense chassis layouts. |
| Test Equipment Data Acquisition | Programmable Logic Controller I/O Hub |
Use Scenario: Isolating DUT digital signals from measurement instrumentation in automated test fixtures with mixed-voltage subsystems. IC Role / Device Role / Timing Role: Controlled-direction buffer providing galvanic separation between stimulus and capture channels via OEAB/OEBA gating. Use Value: Sub-10-ns enable-to-output delay (tPZL) enables precise timestamping of signal edges during high-speed sampling. | Use Scenario: Aggregating sensor inputs and actuator outputs across multiple I/O racks connected to a central PLC CPU via parallel bus cabling. IC Role / Device Role / Timing Role: High-current bus repeater driving 12+ TTL loads per channel while maintaining noise immunity in electrically noisy factory floors. Use Value: −0.2 mA IIL and 20 µA IIH ensure stable logic levels despite EMI-induced leakage on long cable runs. |
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 |
|---|---|---|---|
| SN74BCT29863BDW | Same die, identical electrical specs, SOIC-24 package with tube packaging (25 pcs); no part marking variation | No functional difference; used interchangeably where tape-and-reel not required | Select SN74BCT29863BDW for manual prototyping or low-volume board assembly requiring tube delivery |
| SN74AS29863N | Bipolar-only design; higher ICCZ (30–45 mA), faster tPLH (0.8 ns typ), but lower noise immunity and no power-up high-Z | Suitable only in speed-critical, low-noise lab environments-not for hot-swap or uncontrolled power sequencing | Choose SN74AS29863N only if sub-nanosecond propagation is mandatory and thermal/power constraints permit |
Compared with SN74BCT29863BDW, the SN74BCT29863BNT offers identical performance and footprint but differs in packaging format (tube vs. tape-and-reel) and part marking; versus SN74AS29863N, it trades raw speed for robustness, lower power, and safe power-up behavior essential in field-deployed equipment.
Availability
SN74BCT29863BNT is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system bus extensions, and programmable logic controller I/O hubs requiring stable component supply across extended product lifecycles.
Supply support for SN74BCT29863BNT 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 SN74BCT29863BNT belongs to TI's BCT (Bipolar-CMOS Transceiver) logic family, designed specifically to replace high-power TTL bus interfaces with lower-power, higher-drive alternatives while maintaining full pin and functional compatibility.
FAQ
What is the operating voltage range for the SN74BCT29863BNT?
The SN74BCT29863BNT operates over a supply voltage range of 4.5 V to 5.5 V. This 5-V nominal specification ensures compatibility with legacy TTL and LVTTL systems while maintaining sufficient noise margin. Operation outside this range may cause undefined behavior or permanent damage, as absolute maximum ratings limit VCC to −0.5 V to 7 V.
Does the SN74BCT29863BNT support hot-plug or live insertion?
Yes, the SN74BCT29863BNT supports safe hot-plug operation due to its power-up high-impedance state and robust input clamp current (−18 mA). During power ramp-up or brownout, all outputs remain in high-Z, preventing bus contention. The device also features ESD protection exceeding 2000 V per MIL-STD-883C, enhancing resilience during field maintenance.
How many output-enable inputs does the SN74BCT29863BNT have, and what do they control?
The SN74BCT29863BNT has four output-enable inputs: OEAB1, OEAB2, OEBA1, and OEBA2. These control bidirectional data flow-OEABx enables transmission from A to B, OEBAx enables transmission from B to A, and specific combinations (e.g., both OEAB low, both OEBA high) place the device in isolation mode. Their active-low logic allows direct interfacing with standard microcontroller GPIOs.
Is the SN74BCT29863BNT pin-compatible with older 74ALS29863 devices?
Yes, the SN74BCT29863BNT is functionally and pin-compatible with the 74ALS29863 and AMD Am29863A, as confirmed in the datasheet. It uses the same 24-pin SOIC (DW) or DIP (NT) footprint, identical pin assignments, and matching logic thresholds-enabling drop-in replacement in legacy designs without PCB modification.
What is the maximum output sink current for the SN74BCT29863BNT at 5 V supply?
The maximum guaranteed low-level output current (IOL) for the SN74BCT29863BNT is 96 mA per pin at VCC = 4.5 V to 5.5 V and TA = 0°C to 70°C. This high drive capability allows direct interfacing with up to 20 standard TTL loads or termination of unterminated 50-Ω transmission lines without external buffers.
SN74BCT29863BNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74BCT
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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, 48mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-PDIP
SN74BCT29863BNT FAQ
1.How can I place an order for SN74BCT29863BNT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74BCT29863BNT 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 SN74BCT29863BNT reliable?
The price and inventory of SN74BCT29863BNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74BCT29863BNT is usually 5 days.
3.What payment methods are accepted for SN74BCT29863BNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74BCT29863BNT transactions.
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4.How is shipping managed for SN74BCT29863BNT?
SN74BCT29863BNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74BCT29863BNT 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 SN74BCT29863BNT?
For technical support, including SN74BCT29863BNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74BCT29863BNT requirements.
6.How does Aetrix verify that SN74BCT29863BNT is sourced from the original manufacturer or authorized distributors?
All SN74BCT29863BNT 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 SN74BCT29863BNT meets industry standards.
7.What is the process for return or replacement of SN74BCT29863BNT?
All SN74BCT29863BNT units undergo pre-shipment inspection (PSI). If there is an issue with SN74BCT29863BNT, 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 SN74BCT29863BNT part is unused and in its original packaging.
Return procedure for SN74BCT29863BNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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