SN74CB3Q3245GQNR

Overview

The SN74CB3Q3245GQNR is an octal FET bus switch from the Widebus+ family, designed for high-bandwidth data paths up to 500 MHz. It operates with a VCC supply range of 2.3 V to 3.6 V and features 5-V tolerant I/Os regardless of device power state. The device utilizes a charge pump to maintain low and flat ON-state resistance (ron) characteristics over the operating range, typically 5 Ω. It supports rail-to-rail switching on data ports, bidirectional data flow with near-zero propagation delay, and includes undershoot clamp diodes on data and control inputs.

Feature Summary

• High-bandwidth data path supporting broadband communications and networking
• Low and flat ON-state resistance characteristics over the full operating range
• 5-V tolerant I/Os that function correctly when the device is powered down
• Integrated charge pump mechanism to elevate gate voltage for optimal switching

Applications

• PCI interface systems
• Differential signal interfaces
• Memory interleaving architectures
• Bus isolation circuits
• Low-distortion signal gating

Procurement Notes

Verify the specific ordering suffix GQNR against the manufacturer's current documentation to confirm package type and tape-and-reel specifications. Ensure the component meets the required temperature range and electrical parameters for the target application environment before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high-speed data transfer with minimal signal distortion. The integrated charge pump ensures consistent performance across varying load conditions. Verify that the control input voltage levels are compatible with the system logic to ensure proper enable/disable functionality during operation.

Part Context

This part belongs to the SN74CB3Q series within Texas Instruments' Widebus+ family. It is specifically engineered as an 8-bit FET bus switch optimized for low-voltage, high-frequency applications. The design focuses on minimizing capacitive loading while maintaining robust signal integrity in complex digital and analog switching environments.

Replacement Considerations

Consult official substitution lists for verified equivalents. Generic replacements may not match the specific charge pump architecture or bandwidth capabilities.