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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74BCT25245DWR

Name: SN74BCT25245DWR
Brand: Texas Instruments
SKU: SN74BCT25245DWR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74BCT25245DWR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74BCT25245DWR.pdf

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

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Product details

Overview

SN74BCT25245DWR from Texas Instruments is an octal 25-Ω bus transceiver with bidirectional data flow controlled by DIR and 3-state isolation enabled by OE. It delivers 188-mA low-level output current on the A port, supports 5-V operation, and operates from 0°C to 70°C - designed for incident-wave switching on 25-Ω transmission lines in memory address and clock driver applications.

For engineers reviewing the SN74BCT25245DWR datasheet, SN74BCT25245DWR pinout, SN74BCT25245DWR application, or SN74BCT25245DWR equivalent, key selection criteria include 25-Ω line driving capability, distributed V_CC/GND for noise suppression, 376-mA A-port sink current, and SOIC-24 package compatibility with legacy TTL/CMOS buses.

Technical Context

The SN74BCT25245DWR uses BiCMOS technology to combine bipolar drive strength with CMOS input logic, enabling high-current sinking (376 mA on A port) while maintaining low ICCZ (12–16 mA). Its dual-bus architecture supports asynchronous bidirectional communication between A and B ports via DIR-controlled direction and OE-gated 3-state isolation.

Designed specifically for incident-wave switching on 25-Ω or higher impedance lines, it leverages distributed power/ground pins to minimize simultaneous switching noise. The device meets MIL-STD-883C ESD requirements (>2000 V HBM) and operates within 4.5 V to 5.5 V supply range with guaranteed VOL ≤ 0.7 V at 188 mA on A port.

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 systems and stable operation across industrial voltage tolerances.
A-port I_OL	376 mA - enables direct driving of 25-Ω transmission lines without external buffers during incident-wave switching.
B-port I_OL	48 mA - sufficient for termination-limited loads and stub-driven interfaces in backplane or board-level buses.
t_PLH/t_PHL	1.2 ns to 7.2 ns - sub-8 ns propagation ensures timing compliance in high-speed address/data multiplexing up to ~100 MHz.
Operating Temperature	0°C to 70°C - qualified for commercial-grade embedded systems including industrial controllers and test equipment.
V_OL (A port)	≤ 0.7 V at 188 mA - guarantees robust low-state margin when driving unterminated 25-Ω lines under worst-case load.
ESD Rating	>2000 V HBM - exceeds MIL-STD-883C Method 3015, supporting handling in non-ESD-protected assembly environments.

Pinout & Package

SN74BCT25245DWR is housed in a 24-pin SOIC (DW) package with gull-wing leads, 0.300-inch body width, and RoHS-compliant NiPdAu lead finish. Pin pitch is 1.27 mm; package conforms to JEDEC MS-013 with moisture sensitivity level 1 (unlimited floor life at <30°C/60% RH).

Pin/Terminal	Circuit Role	Design Meaning
1, 13, 24	OE (Output Enable)	Active-low global 3-state control - asserts high-impedance on both A and B ports when high, isolating buses.
12, 23	DIR (Direction Control)	Controls data flow direction: low = B→A, high = A→B - enables flexible bus arbitration without external logic.
2–9, 14–21	A1–A8 / B1–B8	Octal bidirectional I/O channels - each pair connects A and B buses with matched 25-Ω drive strength and low skew.
10, 11, 15, 16, 22	GND / V_CC	Distributed power/ground pins - reduce simultaneous switching noise and improve signal integrity on high-current transitions.

Key Features

Feature	Design Value
25-Ω line driving	Enables incident-wave switching on controlled-impedance PCB traces without termination resistors or delay lines.
BiCMOS process	Combines TTL-compatible input thresholds with bipolar output stage for 376-mA sink current and fast edge rates.
Distributed V_CC/GND	Five dedicated power/ground pins minimize ground bounce and supply droop during full-bus switching events.
3-state isolation	OE-controlled high-impedance state prevents bus contention in multi-master or shared-memory architectures.
MIL-STD-883C ESD	Survives >2000 V HBM - reduces need for external protection diodes in cost-sensitive industrial designs.

Applications

Memory Address Driver	Clock Distribution Hub
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or flash devices on a shared bus. IC Role / Device Role / Timing Role: Bidirectional address transceiver that isolates memory banks during read/write cycles and maintains signal integrity over 25-Ω trace routing. Use Value: Eliminates need for discrete buffer arrays while delivering 376-mA sink current to meet setup/hold timing on long parallel address paths.	Use Scenario: Distributing a single system clock to multiple synchronous peripherals with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew, high-drive clock fanout buffer with 3-state control for dynamic clock gating. Use Value: Supports incident-wave launch into 25-Ω clock nets, reducing reflections and jitter accumulation across 8 downstream loads.
Backplane Bus Interface	Legacy System Interconnect
Use Scenario: Bridging local processor bus to a passive backplane carrying multiple daughter cards. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing data flow between CPU and peripheral slots with direction arbitration via DIR. Use Value: Distributed power/ground pins suppress noise coupling across 24-pin interface, improving bit-error rate in noisy chassis environments.	Use Scenario: Interfacing modern FPGA-based controllers with legacy TTL-based instrumentation modules. IC Role / Device Role / Timing Role: Level-shifting and drive-strengthening transceiver compatible with 5-V TTL logic families and 25-Ω cabling standards. Use Value: Provides guaranteed VOL ≤ 0.7 V at 188 mA, ensuring noise margin compliance with older 74-series receivers under worst-case loading.

Memory Address Driver

Clock Distribution Hub

Use Scenario: Driving address lines from a microcontroller to multiple SRAM or flash devices on a shared bus.

IC Role / Device Role / Timing Role: Bidirectional address transceiver that isolates memory banks during read/write cycles and maintains signal integrity over 25-Ω trace routing.

Use Value: Eliminates need for discrete buffer arrays while delivering 376-mA sink current to meet setup/hold timing on long parallel address paths.

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

IC Role / Device Role / Timing Role: Low-skew, high-drive clock fanout buffer with 3-state control for dynamic clock gating.

Use Value: Supports incident-wave launch into 25-Ω clock nets, reducing reflections and jitter accumulation across 8 downstream loads.

Backplane Bus Interface

Legacy System Interconnect

Use Scenario: Bridging local processor bus to a passive backplane carrying multiple daughter cards.

IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing data flow between CPU and peripheral slots with direction arbitration via DIR.

Use Value: Distributed power/ground pins suppress noise coupling across 24-pin interface, improving bit-error rate in noisy chassis environments.

Use Scenario: Interfacing modern FPGA-based controllers with legacy TTL-based instrumentation modules.

IC Role / Device Role / Timing Role: Level-shifting and drive-strengthening transceiver compatible with 5-V TTL logic families and 25-Ω cabling standards.

Use Value: Provides guaranteed VOL ≤ 0.7 V at 188 mA, ensuring noise margin compliance with older 74-series receivers under worst-case loading.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ABT245N	Higher drive (64 mA B-port), lower ICCZ (5 mA), but only 12 mA A-port I_OL; no 25-Ω line optimization.	Best for low-power, high-density logic interfacing - not suitable for incident-wave transmission line driving.	Select SN74ABT245N when minimizing quiescent current matters more than line-driving capability.
SN74LVC245A	3.3-V only, max 24 mA I_OL, no 25-Ω design focus; supports 1.65–3.6 V operation.	Targeted at mixed-voltage 3.3-V systems with lower drive needs - incompatible with 5-V bus environments.	Choose SN74LVC245A only in new 3.3-V designs where voltage scaling and lower EMI are priorities.

Compared with SN74ABT245N and SN74LVC245A, the SN74BCT25245DWR uniquely delivers 376-mA A-port sink current and 25-Ω line driving architecture - making it irreplaceable for legacy 5-V incident-wave bus applications requiring high-current transient response and noise-immune layout.

Availability

SN74BCT25245DWR is available at Aetrix Electronics and suitable for memory address drivers, clock distribution hubs, and backplane bus interfaces requiring stable component supply across extended production lifecycles.

Supply support for SN74BCT25245DWR 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 BCT family was developed to bridge TTL and CMOS logic domains with high-current BiCMOS outputs - specifically targeting 5-V bus driving, memory expansion, and legacy system interconnect where signal integrity on controlled-impedance lines is critical.

FAQ

What is the maximum sink current capability of the SN74BCT25245DWR on its A port?

The SN74BCT25245DWR supports up to 376 mA of low-level output current (I_OL) on its A port under recommended operating conditions (V_CC = 4.5 V to 5.5 V, T_A = 0°C to 70°C). This rating enables direct driving of 25-Ω transmission lines without external buffering and is validated per the absolute maximum ratings table in the official TI datasheet SCBS053B.

Does the SN74BCT25245DWR support bidirectional data flow, and how is direction controlled?

Yes, the SN74BCT25245DWR supports true bidirectional data flow between its A and B buses. Direction is controlled by the DIR input: when DIR is high, data flows from A to B; when DIR is low, data flows from B to A. This logic-level control eliminates the need for external multiplexers or dual unidirectional buffers in bus arbitration schemes.

What package type and pin count does the SN74BCT25245DWR use?

The SN74BCT25245DWR uses a 24-pin SOIC (DW) package with standard 0.300-inch body width and 1.27-mm lead pitch. It is RoHS-compliant with NiPdAu lead finish and rated MSL Level-1 (unlimited floor life), matching JEDEC MS-013 specifications and enabling drop-in replacement in legacy 5-V board designs.

Can the SN74BCT25245DWR be used in place of standard 74-series transceivers like the 74LS245?

Yes, the SN74BCT25245DWR is pin-compatible with the 74LS245 in SOIC-24 (DW) packaging and shares identical pinout and logic functions (DIR, OE, A/B ports). However, it offers significantly higher drive strength (376 mA vs. ~24 mA), lower propagation delay (≤7.2 ns vs. ~15 ns), and BiCMOS noise immunity - making it a performance upgrade without PCB changes.

What is the operating temperature range specified for the SN74BCT25245DWR?

The SN74BCT25245DWR is characterized for operation from 0°C to 70°C - the commercial temperature range. This specification is explicitly stated in the "recommended operating conditions" table of the TI datasheet SCBS053B and distinguishes it from the military-grade SN54BCT25245 (−55°C to 125°C).

SN74BCT25245DWR 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:: 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:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-SOIC

SN74BCT25245DWR FAQ

1.How can I place an order for SN74BCT25245DWR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74BCT25245DWR 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 SN74BCT25245DWR reliable?

The price and inventory of SN74BCT25245DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74BCT25245DWR is usually 5 days.

3.What payment methods are accepted for SN74BCT25245DWR?

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4.How is shipping managed for SN74BCT25245DWR?

SN74BCT25245DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74BCT25245DWR 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 SN74BCT25245DWR?

For technical support, including SN74BCT25245DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74BCT25245DWR requirements.

6.How does Aetrix verify that SN74BCT25245DWR is sourced from the original manufacturer or authorized distributors?

All SN74BCT25245DWR 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 SN74BCT25245DWR meets industry standards.

7.What is the process for return or replacement of SN74BCT25245DWR?

All SN74BCT25245DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74BCT25245DWR, 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 SN74BCT25245DWR part is unused and in its original packaging.

Return procedure for SN74BCT25245DWR:

1.Submit a request within 90 days.

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

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