SN74CBT3305CPW

Overview

The SN74CBT3305CPW is a dual-channel, single-pole single-throw (SPST) FET bus switch from Texas Instruments. It operates at a supply voltage of 5 V and features undershoot protection to safeguard against signal integrity issues. The device incorporates a true output configuration alongside a dual-function, 1-bit decoder for flexible control logic. Designed for surface-mount applications, it utilizes an 8-pin TSSOP package. Key electrical specifications include a maximum on-resistance of 12 ohms and a maximum propagation delay of 150 ps. It supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Dual independent SPST channels with integrated undershoot protection
• True output configuration combined with a dual-function 1-bit decoder
• Low on-resistance and fast propagation delay for high-speed data switching

Applications

• Portable equipment requiring low-voltage bus switching
• Consumer electronics utilizing 5V logic interfaces
• Computing modules needing signal path isolation

Procurement Notes

Verify the complete part number including the suffix 'PW' to confirm the TSSOP-8 package type. Ensure compatibility with 5V logic levels and check that unused control inputs are properly terminated to VCC or GND as specified in the official datasheet to guarantee stable operation. Confirm RoHS compliance status through the manufacturer's documentation before integration.

Selection Notes

Select this component when dual isolated bidirectional paths are required within a compact footprint. The inclusion of undershoot protection makes it suitable for systems prone to voltage transients. The decoder functionality allows for simplified control schemes compared to standard switches. Evaluate the 12-ohm on-resistance against load requirements to ensure minimal signal attenuation during active states.

Part Context

This device belongs to the SN74CBT325x series of low-voltage bus switches. It shares architectural similarities with other members like the SN74CBT3245 but differs in channel count and specific control logic. The series is characterized by CMOS technology optimized for low power consumption and high speed in portable digital applications.

Replacement Considerations

Direct substitutes may include other dual-channel 5V bus switches from the same family, such as variants with different package options. Cross-referencing pinouts and control logic definitions is essential when considering alternative manufacturers or pin-compatible upgrades.