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Texas Instruments SN64BCT25245DWRG4
- Part No.:
- SN64BCT25245DWRG4
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN64BCT25245DWRG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,571
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Product details
Overview
SN64BCT25245DWRG4 from Texas Instruments is a 25-Ω octal bus transceiver with BiCMOS design, supporting bidirectional asynchronous data flow between A and B buses via DIR control, sinking up to 188 mA on A port for incident-wave switching on 25-Ω lines, and operating across −40°C to 85°C in SOIC-24 package.
For engineers reviewing the SN64BCT25245DWRG4 datasheet, SN64BCT25245DWRG4 pinout, SN64BCT25245DWRG4 application, or SN64BCT25245DWRG4 equivalent, key selection factors include 25-Ω line driving capability, high-impedance state during power sequencing, distributed VCC/GND noise suppression, and dual-voltage logic compatibility (VIL = 0.8 V, VIH = 2 V).
Technical Context
This transceiver implements true 3-state bidirectional bus interface logic with separate direction (DIR) and output-enable (OE) controls, enabling A→B or B→A data flow under active-low OE. Its BiCMOS architecture delivers low ICCZ (12–16 mA) while sustaining high current drive for transmission-line termination.
Designed specifically for incident-wave switching on ≥25-Ω lines, it features distributed power/ground pins to minimize simultaneous-switching noise and ensures high-impedance outputs during power-up/down when VCC < ~3 V - critical for hot-swap and system-level bus isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - supports standard 5-V TTL/CMOS systems with ±10% supply tolerance. |
| IOL (A port) | 188 mA - enables direct incident-wave switching on 25-Ω transmission lines without external termination. |
| tPLH / tPHL | 1.2–6.7 ns - sub-7-ns propagation delay ensures timing compliance in high-speed bus arbitration and memory interfacing. |
| IOZ (Power-up/down) | <70 µA - guarantees high-impedance state during voltage ramp, preventing bus contention during sequencing. |
| ESD Protection | >2000 V per MIL-STD-883C Method 3015 - provides robust handling in manufacturing and board-level integration. |
| Operating Temp | −40°C to 85°C - qualified for industrial-grade embedded and communications equipment environments. |
Pinout & Package
SN64BCT25245DWRG4 is housed in a 24-pin SOIC (DW) package with gull-wing leads, 300-mil body width, and RoHS-compliant NiPdAu finish (Level-1 MSL). Pin layout follows data-flow-through topology: all A-side inputs on left, B-side outputs on right, with distributed VCC (pins 11, 20) and GND (pins 2, 5, 7, 10, 13) for noise reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | A-side data inputs/outputs | 8-bit parallel bus port; bidirectional when enabled, high-Z when OE high. |
| B1–B8 | B-side data inputs/outputs | 8-bit parallel bus port; direction determined by DIR; high-Z when OE high. |
| DIR | Direction control input | Low = B→A transfer; High = A→B transfer; referenced to VCC/GND, TTL-compatible thresholds. |
| OE | Output enable input | Active-low; forces both A and B ports into high-impedance state when high. |
| VCC (pins 11, 20) | Supply voltage | Dual VCC pins reduce IR drop and switching noise across wide bus operation. |
| GND (pins 2, 5, 7, 10, 13) | Ground reference | Five distributed GND pins minimize ground bounce during simultaneous 8-bit switching. |
Key Features
| Feature | Design Value |
|---|---|
| 25-Ω line driving | 188-mA A-port sink current enables clean incident-wave switching on controlled-impedance PCB traces without added resistors. |
| Data-flow-through pinout | A and B ports placed on opposite sides of package simplifies PCB routing and reduces crosstalk in dense bus layouts. |
| Power-up/power-down high-Z | Outputs remain high-impedance until VCC exceeds ~3 V - eliminates bus conflicts during power sequencing or hot-plug events. |
| Distributed VCC/GND | Five GND and two VCC pins suppress simultaneous-switching noise, improving signal integrity in multi-bit parallel interfaces. |
| BiCMOS process | Combines bipolar speed and CMOS low ICCZ (12–16 mA), reducing quiescent power vs. pure bipolar transceivers. |
Applications
| Memory Address Buffering | Backplane Bus Interface |
|---|---|
|
Use Scenario: Driving address lines from microcontroller to multiple SRAM or EPROM devices on shared bus. IC Role / Device Role / Timing Role: Bidirectional 3-state address driver with direction control synchronized to memory access cycles. Use Value: 188-mA sink capability ensures fast edge rates on 25-Ω routed address traces, reducing setup/hold timing margin loss. |
Use Scenario: Interfacing CPU local bus to modular backplane with hot-swappable I/O cards. IC Role / Device Role / Timing Role: Isolation transceiver managing data flow between master and slave slots under DIR/OE control. Use Value: Power-up high-Z prevents bus contention during card insertion; distributed GND/VCC maintains signal integrity across 8-bit parallel lanes. |
| Industrial PLC I/O Expansion | Legacy ISA Bus Bridge |
|
Use Scenario: Extending digital I/O capacity between PLC CPU and remote terminal units over long PCB traces. IC Role / Device Role / Timing Role: Level-shifting and bus-isolating transceiver supporting 25-Ω trace impedance matching. Use Value: Incident-wave switching minimizes reflections on extended bus runs, preserving logic margins in noisy factory environments. |
Use Scenario: Adapting modern peripheral controllers to legacy ISA bus timing and loading requirements. IC Role / Device Role / Timing Role: Bidirectional data path translator with OE-controlled isolation between ISA data bus and controller core. Use Value: Sub-7-ns propagation delay meets ISA's 8-MHz timing budget; high-impedance state supports bus arbitration protocols. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74BCT244N | Octal buffer (unidirectional), no DIR pin; 64-mA IOL; DIP-20 package only. | Lacks bidirectional capability and 25-Ω line drive; suited for fixed-direction address/data latching. | Select when direction is static and lower drive current suffices; not suitable for dynamic bus sharing. |
| SN74ACT245DW | Octal transceiver with 24-mA IOL (B port), CMOS process, 4.5–5.5 V, SOIC-20. | Lower drive strength, no incident-wave optimization; higher noise immunity but insufficient for 25-Ω line switching. | Choose for lower-power, noise-sensitive applications where 25-Ω line termination is handled externally. |
Compared with SN64BCT25245DWRG4, SN74BCT244N lacks bidirectionality and line-driving capability, while SN74ACT245DW trades drive strength for CMOS efficiency - making SN64BCT25245DWRG4 uniquely suited for high-fidelity 25-Ω bus interconnects requiring incident-wave control.
Availability
SN64BCT25245DWRG4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, memory subsystem buffering, and legacy bus bridging requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for SN64BCT25245DWRG4 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
SN64BCT25245DWRG4 belongs to TI's BCT logic family, engineered for high-speed, low-noise bus interfacing in industrial control and computing infrastructure where signal integrity and power sequencing reliability are critical.
FAQ
What is the primary function of the SN64BCT25245DWRG4 in a system?
The SN64BCT25245DWRG4 serves as an octal bidirectional bus transceiver that enables asynchronous data transfer between two 8-bit buses (A and B) under DIR control, with OE enabling high-impedance isolation. Its 188-mA A-port sink current is specifically designed to drive 25-Ω transmission lines using incident-wave switching - a key requirement in high-speed memory and backplane interfaces where signal integrity depends on controlled impedance matching.
Does the SN64BCT25245DWRG4 support hot-swap or power sequencing scenarios?
Yes, the SN64BCT25245DWRG4 enters a guaranteed high-impedance state when VCC is below approximately 3 V, ensuring both A and B ports remain isolated during power-up and power-down transitions. This behavior prevents bus contention in hot-plug systems and supports safe power sequencing in multi-rail industrial designs - verified by measured IOZ < 70 µA during VCC ramp.
How does the SN64BCT25245DWRG4 differ from standard 74-series transceivers like the 74LS245?
Unlike 74LS245, the SN64BCT25245DWRG4 uses BiCMOS technology to achieve significantly higher sink current (188 mA vs. ~24 mA), enabling direct 25-Ω line driving without external termination. It also features distributed VCC/GND pins and data-flow-through pinout for reduced noise and simplified layout - advantages confirmed in TI's SCBS060A datasheet for industrial bus reliability.
What package and environmental compliance does the SN64BCT25245DWRG4 have?
SN64BCT25245DWRG4 is supplied in a 24-pin SOIC (DW) package with NiPdAu lead finish, RoHS-compliant and halogen-free (Green), rated MSL Level-1 (unlimited floor life), and qualified for −40°C to 85°C operation. The "G4" suffix denotes TI's green packaging standard per JS709B, with device marking "6BCT25245" laser-etched on the top surface.
Can the SN64BCT25245DWRG4 be used with 3.3-V logic systems?
No - the SN64BCT25245DWRG4 is specified only for 4.5 V to 5.5 V VCC operation and TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V). It is not 3.3-V tolerant: applying 3.3-V signals to inputs or outputs risks violating absolute maximum ratings (e.g., VI > 5.5 V on I/O ports), and its 188-mA drive is optimized for 5-V 25-Ω line matching, not 3.3-V systems.
SN64BCT25245DWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 64BCT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 80mA, 188mA; 3mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
SN64BCT25245DWRG4 FAQ
1.How can I place an order for SN64BCT25245DWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN64BCT25245DWRG4 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 SN64BCT25245DWRG4 reliable?
The price and inventory of SN64BCT25245DWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN64BCT25245DWRG4 is usually 5 days.
3.What payment methods are accepted for SN64BCT25245DWRG4?
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4.How is shipping managed for SN64BCT25245DWRG4?
SN64BCT25245DWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN64BCT25245DWRG4 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 SN64BCT25245DWRG4?
For technical support, including SN64BCT25245DWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN64BCT25245DWRG4 requirements.
6.How does Aetrix verify that SN64BCT25245DWRG4 is sourced from the original manufacturer or authorized distributors?
All SN64BCT25245DWRG4 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 SN64BCT25245DWRG4 meets industry standards.
7.What is the process for return or replacement of SN64BCT25245DWRG4?
All SN64BCT25245DWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN64BCT25245DWRG4, 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 SN64BCT25245DWRG4 part is unused and in its original packaging.
Return procedure for SN64BCT25245DWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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