SN74CB3Q3244PW

Overview

The SN74CB3Q3244PW is an 8-bit FET bus switch in a 20-pin TSSOP package. It operates on a VCC supply range of 2.3V to 3.6V and supports bidirectional data flow with near-zero propagation delay (max 2ns at 3.3V). The device features low ON-state resistance (typical 4Ω to 9Ω) and high bandwidth up to 500MHz. Data I/Os are 5V-tolerant, supporting signaling levels from 0.8V to 5V. It includes dedicated control inputs for two independent 4-bit switches.

Feature Summary

• Rail-to-rail switching capability across the full voltage range of the connected data ports
• Integrated charge pump mechanism that maintains low and flat ON-state resistance over the operating temperature range
• Ioff circuitry designed to prevent damaging current backflow during partial-power-down scenarios
• Data and control inputs equipped with undershoot clamp diodes to protect against signal anomalies

Applications

• Differential signal interface routing
• Memory interleaving systems
• Bus isolation applications
• Low-distortion signal gating

Procurement Notes

Verify the specific ordering suffix 'PW' corresponds to the TSSOP-20 package variant. Confirm the active status of this part number through official Texas Instruments channels, as datasheet addenda indicate potential lifecycle changes or obsolescence for certain packaging options. Ensure compatibility with required thermal and moisture sensitivity levels before finalizing procurement.

Selection Notes

Select this component when designing broadband communications or data-intensive computing systems requiring high-bandwidth interfaces. It is suitable for applications needing rail-to-rail switching between 2.5V and 3.3V domains. Verify that the 5V-tolerant I/O characteristics align with the system's signaling levels and that the bidirectional nature meets the data flow requirements.

Part Context

This device belongs to the SN74CB3Q series of low-voltage, high-bandwidth bus switches manufactured by Texas Instruments. It utilizes FET technology optimized for minimal loading and signal distortion. The Q-series designation indicates automotive-grade reliability standards, making it appropriate for robust industrial and consumer electronic environments.

Replacement Considerations

Check for SN74CB3Q3244PWR if tape-and-reel packaging is preferred over the standard PW configuration. Other pin-compatible alternatives within the CB3Q family may be considered if different bit-widths or control configurations are required.