SN74CBT3245DW

Overview

The SN74CBT3245DW is an octal bus transceiver manufactured by Texas Instruments, designed for bidirectional data transmission. It operates with a single power supply ranging from 2.7V to 3.6V on Port A and 2.7V to 5.5V on Port B, enabling flexible voltage level translation between different logic domains. The device features eight independent channels configured as a single 8-bit transceiver with true output polarity. It utilizes a 24-pin Small Outline Package (SOIC) with a width of 0.295 inches (7.50mm). Key electrical characteristics include a maximum propagation delay of 150 ps and a maximum on-resistance of 12 ohms. The component supports continuous input/output currents up to 128 mA and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Supports bidirectional data transfer across eight independent channels
• Enables voltage level translation between 2.7V-3.6V and 2.7V-5.5V domains
• Provides high-speed signal integrity with low propagation delay
• Features robust output drive capability for system interfacing

Applications

• High-density data buses in portable electronic devices
• Voltage translation interfaces between low-voltage controllers and 5V peripherals
• Memory expansion modules requiring bidirectional data paths
• Industrial control systems utilizing mixed-voltage logic architectures

Procurement Notes

Verify the specific suffix 'DW' corresponds to the 24-pin SOIC package variant when sourcing. Confirm that the required voltage levels align with the dual-supply specification of Port A and Port B. Ensure the application environment remains within the specified -40°C to +85°C operational temperature range. Check for RoHS compliance status if environmental regulations apply to the final assembly. Validate pinout compatibility against existing PCB footprints before integration.

Selection Notes

Select this component when bidirectional data flow is required between circuits operating at different voltage levels. The SN74CBT3245DW is suitable for applications needing fast switching speeds and moderate current drive capabilities. Consider the 24-pin SOIC package constraints regarding board space and thermal dissipation. Compare against similar transceivers if single-supply operation or higher channel counts are preferred. Evaluate the need for direction control signals inherent to transceiver functionality versus simple bus switches.

Part Context

This part belongs to the Texas Instruments 74CBT series of bus transceivers, which are optimized for low-voltage digital applications. The CBT designation indicates CMOS technology with buffered inputs and outputs designed for high-speed performance. This family is commonly used in consumer electronics and industrial equipment where reliable data transmission across varying voltage domains is critical. The DW package variant specifically denotes the standard small outline integrated circuit form factor widely available in manufacturing supply chains.

Replacement Considerations

SN74CBT3245ADW: Enhanced version with improved specifications under the same package and pinout configuration.