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Texas Instruments SN64BCT25245DW

Name: SN64BCT25245DW
Brand: Texas Instruments
SKU: SN64BCT25245DW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN64BCT25245DW

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 24-SOIC (0.295", 7.50mm Width)

Datasheet:: SN64BCT25245DW.pdf

Description:: IC TXRX NON-INVERT 5.5V 24SOIC

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Product details

Overview

SN64BCT25245DW from Texas Instruments is an octal 25-Ω bus transceiver with BiCMOS design, supporting bidirectional asynchronous data flow between A and B buses via DIR control and 3-state isolation via OE. It delivers 188-mA low-level output current on the A port, operates from −40°C to 85°C, and uses a 24-pin SOIC (DW) package for high-density bus interfacing in memory and clock driver applications.

For engineers reviewing the SN64BCT25245DW datasheet, SN64BCT25245DW pinout, SN64BCT25245DW application, or SN64BCT25245DW equivalent, key selection criteria include incident-wave switching capability on 25-Ω lines, simultaneous-output noise suppression via distributed V_CC/GND pins, high-impedance state during power sequencing, and BiCMOS-enabled low ICCZ quiescent current.

Technical Context

The SN64BCT25245DW implements dual-directional 8-bit bus transceivers with independent direction (DIR) and output-enable (OE) controls, enabling A→B or B→A data flow under active-low OE. Its BiCMOS architecture combines bipolar drive strength with CMOS input logic, achieving 188-mA I_OL on A-port outputs while maintaining TTL-compatible input thresholds (V_IL = 0.8 V, V_VIH = 2.0 V).

Distributed V_CC and GND pins across the 24-pin SOIC package reduce simultaneous switching noise; outputs enter high-impedance state when V_CC < ~3 V, ensuring safe power-up/down behavior. The device supports incident-wave switching on transmission lines ≥25 Ω without termination resistors.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL/CMOS systems and stable operation under supply variation.
I_OL (A port)	188 mA - Enables direct driving of 25-Ω transmission lines at incident wave, eliminating need for external line drivers.
t_PLH/t_PHL	1.2–7.3 ns - Supports high-speed bus communication up to ~100 MHz with minimal propagation delay skew.
ICCZ Quiescent Current	12–16 mA - State-of-the-art BiCMOS design reduces standby power vs. legacy bipolar transceivers.
Operating Temperature	−40°C to 85°C - Qualified for industrial-grade embedded systems requiring extended thermal reliability.
ESD Protection	>2000 V per MIL-STD-883C Method 3015 - Provides robust handling margin during board assembly and field operation.

Pinout & Package

SN64BCT25245DW uses a 24-pin SOIC (DW) package with 300-mil body width, gull-wing leads, and RoHS-compliant NiPdAu finish. Pin spacing is 0.050 inch (1.27 mm), and package outline conforms to JEDEC MS-013AC.

Pin/Terminal	Circuit Role	Design Meaning
A1–A8	Input/Output (A-side bus)	Bi-directional data terminals for A bus; driven high-impedance when OE = H or V_CC < 3 V.
B1–B8	Input/Output (B-side bus)	Bi-directional data terminals for B bus; sink up to 24 mA low-level current (I_OL) on B port.
DIR	Direction control input	Active-HIGH selects A→B data flow; LOW selects B→A - enables full-duplex bus arbitration logic.
OE	Output enable input	Active-LOW enables transceiver; HIGH forces all A/B pins into high-impedance state for bus isolation.
V_CC	Power supply	Dual V_CC pins (pins 13 & 20) reduce IR drop and switching noise during parallel output transitions.
GND	Ground	Four GND pins (pins 2, 5, 7, 10) provide low-inductance return paths and minimize ground bounce.

Key Features

Feature	Design Value
Data Flow-Through Pinout	Inputs (A1–A8, DIR, OE) on left side; outputs (B1–B8) on right side - simplifies PCB routing and minimizes trace crosstalk.
Incident-Wave Switching Support	Optimized 25-Ω output impedance enables clean edge launch onto matched transmission lines without external termination.
Power Sequencing Safety	High-impedance state asserted automatically when V_CC < ~3 V - prevents bus contention during power ramp-up/down.
Noise-Resilient Power Distribution	Distributed V_CC and GND pins suppress simultaneous switching noise (SSN) by >6 dB vs. single-supply-pin layouts.

Applications

Memory Address Buffering	Clock Distribution Network
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or EPROM devices sharing a common bus. IC Role / Device Role / Timing Role: Bidirectional address transceiver isolating master and slave address domains while maintaining signal integrity over 25-Ω traces. Use Value: Eliminates need for discrete series resistors or buffer ICs; 188-mA drive ensures fast edge rates on long memory address traces.	Use Scenario: Distributing a system clock signal from a PLL to multiple synchronous peripherals with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew, high-drive clock fanout buffer with controlled 25-Ω output impedance for impedance-matched clock tree routing. Use Value: Reduces clock reflection and overshoot; t_PLH/t_PHL ≤ 7.3 ns ensures sub-100 ps skew across 8 outputs.
Backplane Data Bus Interface	Industrial Control I/O Expansion
Use Scenario: Interfacing local processor bus to a 25-Ω characteristic-impedance backplane carrying multi-slot data traffic. IC Role / Device Role / Timing Role: Asynchronous bus transceiver enabling hot-swappable module communication with directional control per slot. Use Value: DIR-controlled bidirectionality and OE-based isolation prevent bus lock-up during card insertion/removal.	Use Scenario: Extending GPIO count of a PLC CPU to drive 24-V industrial sensors and actuators via level-shifted bus segments. IC Role / Device Role / Timing Role: Robust 3-state bus interface providing noise-immune digital I/O expansion with ESD-hardened inputs. Use Value: 2000-V ESD rating and −40°C to 85°C operation ensure reliability in electrically noisy factory environments.

Memory Address Buffering

Clock Distribution Network

Use Scenario: Driving address lines from a microcontroller to multiple SRAM or EPROM devices sharing a common bus.

IC Role / Device Role / Timing Role: Bidirectional address transceiver isolating master and slave address domains while maintaining signal integrity over 25-Ω traces.

Use Value: Eliminates need for discrete series resistors or buffer ICs; 188-mA drive ensures fast edge rates on long memory address traces.

Use Scenario: Distributing a system clock signal from a PLL to multiple synchronous peripherals with matched trace lengths.

IC Role / Device Role / Timing Role: Low-skew, high-drive clock fanout buffer with controlled 25-Ω output impedance for impedance-matched clock tree routing.

Use Value: Reduces clock reflection and overshoot; t_PLH/t_PHL ≤ 7.3 ns ensures sub-100 ps skew across 8 outputs.

Backplane Data Bus Interface

Industrial Control I/O Expansion

Use Scenario: Interfacing local processor bus to a 25-Ω characteristic-impedance backplane carrying multi-slot data traffic.

IC Role / Device Role / Timing Role: Asynchronous bus transceiver enabling hot-swappable module communication with directional control per slot.

Use Value: DIR-controlled bidirectionality and OE-based isolation prevent bus lock-up during card insertion/removal.

Use Scenario: Extending GPIO count of a PLC CPU to drive 24-V industrial sensors and actuators via level-shifted bus segments.

IC Role / Device Role / Timing Role: Robust 3-state bus interface providing noise-immune digital I/O expansion with ESD-hardened inputs.

Use Value: 2000-V ESD rating and −40°C to 85°C operation ensure reliability in electrically noisy factory environments.

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 (non-transceiver); unidirectional A→Y only; no DIR pin; 150-mA I_OL on Y port.	Lacks bidirectional capability and B-port drive - suitable only for one-way buffering, not bus arbitration.	Select when direction control is handled externally and lower drive (150 mA vs. 188 mA) is acceptable.
SN74ACT245DW	Octal transceiver with CMOS process; 24-mA I_OL on both ports; 5-V tolerant inputs; 8.5 ns max t_PHL.	Lower drive strength limits use on 25-Ω lines; better for general-purpose 5-V logic, not incident-wave switching.	Select for lower power and higher noise immunity where 25-Ω line driving is not required.

Compared with SN74BCT244N and SN74ACT245DW, the SN64BCT25245DW uniquely combines 188-mA A-port drive, DIR-controlled bidirectionality, and distributed power pins - making it the only option qualified for reliable incident-wave switching on 25-Ω transmission lines in industrial backplanes and memory subsystems.

Availability

SN64BCT25245DW is available at Aetrix Electronics and suitable for memory address buffering, clock distribution networks, and industrial backplane interfaces requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for SN64BCT25245DW 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 heritage in high-reliability industrial and automotive ICs.

The SN64BCT25245DW belongs to TI's BCT (Bipolar-CMOS Transceiver) logic family, engineered specifically for high-speed, low-noise bus interfacing in memory, clock, and backplane systems demanding 25-Ω transmission line compatibility.

FAQ

What is the maximum output current capability of the SN64BCT25245DW on its A port?

The SN64BCT25245DW supports up to 188 mA of low-level output current (I_OL) on the A port under recommended operating conditions (V_CC = 4.5 V). This high drive strength enables direct incident-wave switching on 25-Ω transmission lines without external buffers, a key specification confirmed in the SCBS060A datasheet's recommended operating conditions table.

Does the SN64BCT25245DW support bidirectional data flow, and how is direction controlled?

Yes, the SN64BCT25245DW supports bidirectional data flow between A and B buses. Direction is controlled by the DIR input: logic LOW enables B-to-A transfer, and logic HIGH enables A-to-B transfer. This functionality is explicitly defined in the device's function table and logic diagram in the SCBS060A datasheet, with no internal latching or delay added to the DIR signal path.

How does the SN64BCT25245DW behave during power-up and power-down sequences?

The SN64BCT25245DW enters a high-impedance state on all A and B pins whenever V_CC falls below approximately 3 V - covering both power-up ramp and power-down collapse. This behavior is inherent to the BiCMOS design and is documented in the device description and electrical characteristics section of the SCBS060A datasheet, preventing bus contention during supply transitions.

What package type and lead finish does the SN64BCT25245DW use, and is it RoHS compliant?

The SN64BCT25245DW uses a 24-pin SOIC (DW) package with NiPdAu lead finish and is marked "Green (RoHS & no Sb/Br)" per TI's packaging addendum. It meets JEDEC Level-1 moisture sensitivity and is fully RoHS-compliant, with lead-free soldering compatibility verified for peak reflow temperatures up to 260°C.

What is the typical propagation delay for A-to-B data transfer in the SN64BCT25245DW?

The typical propagation delay for A-to-B data transfer in the SN64BCT25245DW is 3.3 ns (t_PLH and t_PHL), measured at V_CC = 5 V, C_L = 50 pF, and T_A = 25°C. The maximum specified delay across temperature and voltage is 7.3 ns, ensuring timing predictability in high-speed bus designs as confirmed in the switching characteristics table of SCBS060A.

SN64BCT25245DW Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 64BCT

Package/Case:: 24-SOIC (0.295", 7.50mm Width)

Packaging:: Bulk

Product Status:: Active

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

SN64BCT25245DW FAQ

1.How can I place an order for SN64BCT25245DW through Aetrix?

Please submit a Request for Quotation (RFQ) for SN64BCT25245DW 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 SN64BCT25245DW reliable?

The price and inventory of SN64BCT25245DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN64BCT25245DW is usually 5 days.

3.What payment methods are accepted for SN64BCT25245DW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN64BCT25245DW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN64BCT25245DW?

SN64BCT25245DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN64BCT25245DW 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 SN64BCT25245DW?

For technical support, including SN64BCT25245DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN64BCT25245DW requirements.

6.How does Aetrix verify that SN64BCT25245DW is sourced from the original manufacturer or authorized distributors?

All SN64BCT25245DW 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 SN64BCT25245DW meets industry standards.

7.What is the process for return or replacement of SN64BCT25245DW?

All SN64BCT25245DW units undergo pre-shipment inspection (PSI). If there is an issue with SN64BCT25245DW, 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 SN64BCT25245DW part is unused and in its original packaging.

Return procedure for SN64BCT25245DW:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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