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Texas Instruments SN64BCT25245DWRE4
- Part No.:
- SN64BCT25245DWRE4
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN64BCT25245DWRE4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,434
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Product details
Overview
SN64BCT25245DWRE4 from Texas Instruments is a 25-Ω octal bus transceiver with BiCMOS design, 188-mA A-port sink current, −40°C to 85°C operation, and data flow-through pinout. It enables asynchronous bidirectional communication between address/data buses in memory and clock driver applications.
For engineers reviewing the SN64BCT25245DWRE4 datasheet, SN64BCT25245DWRE4 pinout, SN64BCT25245DWRE4 application, or SN64BCT25245DWRE4 equivalent, key selection criteria include incident-wave switching capability on 25-Ω lines, high-impedance state during power sequencing, distributed VCC/GND for noise reduction, and dual-bus isolation via DIR/OE control.
Technical Context
This transceiver implements true 3-state bidirectional bus interface logic with separate direction (DIR) and output-enable (OE) controls, supporting A→B and B→A data flow per function table. Its BiCMOS architecture delivers low ICCZ (12–16 mA) while sustaining high drive strength on both ports.
Designed specifically for incident-wave switching on ≥25-Ω transmission lines, it uses distributed VCC and GND pins across the SOIC-24 package to suppress simultaneous switching noise. Outputs enter high-impedance state when VCC < ~3 V, ensuring safe power-up/power-down behavior without bus contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL/CMOS systems and stable operation under supply variation. |
| IOL (A port) | 188 mA - enables direct incident-wave switching of 25-Ω transmission lines without external termination or amplification. |
| tPLH / tPHL | 1.2–6.7 ns - supports high-speed bus transfer up to ~150 MHz with controlled edge rates and minimal propagation skew. |
| IOZ (Power-up/down) | <70 µA - guarantees high-impedance state during voltage ramping, preventing false logic states or bus conflicts. |
| ESD Protection | >2000 V per MIL-STD-883C Method 3015 - provides robust handling during board assembly and system integration. |
| Operating Temp | −40°C to 85°C - qualified for industrial-grade embedded systems requiring extended thermal reliability. |
Pinout & Package
SN64BCT25245DWRE4 is housed in a 24-pin SOIC (DW) package with gull-wing leads, RoHS-compliant NIPDAU finish, and JEDEC Level-1 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | A-side data inputs/outputs | Connect to source bus; driven high/low or tri-stated based on DIR/OE; 188-mA sink capability on A port. |
| B1–B8 | B-side data inputs/outputs | Connect to destination bus; 24-mA sink capability; supports lower-current loads and stubbed interconnects. |
| DIR | Direction control input | Low = B→A data flow; High = A→B data flow; determines active bus path without affecting OE state. |
| OE | Output enable input | Low = transceiver active; High = both A and B ports in high-impedance isolation; overrides DIR. |
| VCC (Pins 13, 20, 22) | Power supply | Distributed across package to minimize simultaneous switching noise and improve power integrity. |
| GND (Pins 2, 5, 7, 10, 12) | Ground reference | Multiple GND pins interleaved with I/O to reduce ground bounce and enhance signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| State-of-the-art BiCMOS design | Reduces ICCZ to 12–16 mA, cutting quiescent power by >50% vs. legacy bipolar bus transceivers. |
| Data flow-through pinout | Inputs (A1–A8, DIR, OE) on left side; outputs (B1–B8) on right side - simplifies PCB routing and minimizes crosstalk. |
| Distributed VCC/GND pins | Five VCC/GND pairs placed strategically across SOIC-24 footprint - lowers simultaneous switching noise by >30% in dense layouts. |
| High-impedance during power sequencing | Outputs remain Hi-Z when VCC < ~3 V - eliminates bus contention during cold start, hot-swap, or brownout conditions. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
|
Use Scenario: Driving multiple SRAM or EPROM address lines from a microcontroller bus with impedance-matched traces. IC Role / Device Role / Timing Role: Bidirectional address bus transceiver enabling shared address space between CPU and memory banks. Use Value: 188-mA A-port sink current directly drives 25-Ω lines, eliminating need for external series termination resistors. |
Use Scenario: Distributing a single clock signal to multiple synchronous peripherals with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew, isolated clock buffer with directional control to prevent feedback coupling. Use Value: Sub-7 ns propagation delay and distributed power pins maintain <100 ps skew across all eight outputs. |
| Backplane Data Interface | Industrial Control Bus Isolation |
|
Use Scenario: Interfacing local processor bus to a 25-Ω parallel backplane carrying status/control data over 10+ cm traces. IC Role / Device Role / Timing Role: Incident-wave switching transceiver ensuring clean signal launch without reflections. Use Value: Designed explicitly for ≥25-Ω line impedance - avoids overshoot/ringing seen with standard 50-Ω drivers. |
Use Scenario: Isolating PLC I/O modules from main controller bus during firmware updates or fault recovery. IC Role / Device Role / Timing Role: Dual-bus isolator activated/deactivated via OE to break galvanic paths during maintenance. Use Value: Guaranteed Hi-Z state at VCC < 3 V prevents spurious writes or reads during power ramping or brownout events. |
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 | Non-inverting octal buffer (unidirectional), 24-mA sink per output, no DIR pin, DIP-20 package. | Lacks bidirectional capability and incident-wave optimization; suited only for fixed-direction buffering. | Select when direction is static and SOIC packaging is not required; verify 24-mA drive meets line impedance needs. |
| SN74ACT245DW | Octal transceiver with 24-mA sink (A/B ports), CMOS process, 4.5–5.5 V, but no 25-Ω line optimization or BiCMOS low ICCZ. | Higher ICCZ (~50 mA), no incident-wave switching spec; better for general-purpose 3-state bus isolation. | Choose for lower-cost, non-critical timing applications where 188-mA drive and sub-5 ns skew are unnecessary. |
Compared with SN74BCT244N and SN74ACT245DW, SN64BCT25245DWRE4 uniquely combines 188-mA A-port drive, BiCMOS efficiency, and explicit 25-Ω line support-making it irreplaceable for high-fidelity incident-wave bus interfaces demanding minimal reflection and tight skew control.
Availability
SN64BCT25245DWRE4 is available at Aetrix Electronics and suitable for memory address buffering, clock distribution networks, and industrial control bus isolation requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for SN64BCT25245DWRE4 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, delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
SN64BCT25245DWRE4 belongs to TI's BCT logic family-designed specifically for high-drive, low-noise, bidirectional bus interfacing in mission-critical industrial and telecom infrastructure equipment.
FAQ
What is the primary function of the SN64BCT25245DWRE4?
The SN64BCT25245DWRE4 is an octal bidirectional bus transceiver that routes data between two 8-bit buses (A and B) under control of DIR and OE inputs. It provides 188-mA sink current on the A port to drive 25-Ω transmission lines using incident-wave switching, and features high-impedance isolation during power transitions. Its BiCMOS design reduces ICCZ while maintaining TTL-compatible logic levels.
Does the SN64BCT25245DWRE4 support hot-swap or live-insertion?
Yes, the SN64BCT25245DWRE4 supports safe hot-swap operation due to its guaranteed high-impedance state when VCC falls below ~3 V. During insertion or removal, outputs remain Hi-Z until VCC stabilizes within specification, preventing bus contention or latch-up. This behavior is verified across −40°C to 85°C and is inherent to its internal power-on reset circuitry-not dependent on external components.
What is the significance of "25-Ω" in the SN64BCT25245DWRE4 description?
The "25-Ω" designation indicates the SN64BCT25245DWRE4 is optimized for incident-wave switching on transmission lines with characteristic impedance of 25 Ω or greater. Its A-port output stage delivers 188-mA sink current to match this impedance, enabling clean signal launch without reflections-critical for high-speed parallel buses in backplanes and memory subsystems where 50-Ω drivers cause overshoot.
How does the SN64BCT25245DWRE4 differ from standard 74-series transceivers like the 74LS245?
Unlike the 74LS245, the SN64BCT25245DWRE4 uses BiCMOS technology to achieve 188-mA A-port drive (vs. ~24 mA), sub-7 ns propagation delay, distributed VCC/GND pins for noise reduction, and explicit 25-Ω line optimization. It also guarantees Hi-Z during power sequencing and exceeds 2000-V ESD protection-features absent in legacy bipolar LS devices.
Is the SN64BCT25245DWRE4 pin-compatible with other DW-packaged transceivers?
No, the SN64BCT25245DWRE4 has a unique 24-pin SOIC (DW) pinout optimized for data flow-through and noise reduction-including five VCC/GND pairs and interleaved I/O. It is not pin-compatible with standard 24-pin transceivers like SN74BCT244 or SN74ACT245, which use different pin assignments for power, ground, and control signals.
SN64BCT25245DWRE4 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
SN64BCT25245DWRE4 FAQ
1.How can I place an order for SN64BCT25245DWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN64BCT25245DWRE4 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 SN64BCT25245DWRE4 reliable?
The price and inventory of SN64BCT25245DWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN64BCT25245DWRE4 is usually 5 days.
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Once your SN64BCT25245DWRE4 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 SN64BCT25245DWRE4?
For technical support, including SN64BCT25245DWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN64BCT25245DWRE4 requirements.
6.How does Aetrix verify that SN64BCT25245DWRE4 is sourced from the original manufacturer or authorized distributors?
All SN64BCT25245DWRE4 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 SN64BCT25245DWRE4 meets industry standards.
7.What is the process for return or replacement of SN64BCT25245DWRE4?
All SN64BCT25245DWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN64BCT25245DWRE4, 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 SN64BCT25245DWRE4 part is unused and in its original packaging.
Return procedure for SN64BCT25245DWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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