SN74CB3Q32245GKER

Overview

The SN74CB3Q32245GKER is a high-bandwidth FET bus switch from the Widebus+ family, organized as four independent 8-bit switches. It operates on a single supply voltage ranging from 2.3 V to 3.6 V and features 5-V tolerant I/Os. The device utilizes a charge pump to achieve low ON-state resistance (typical 5 Ω) and near-zero propagation delay (0.18 ns typical). It supports bidirectional data flow with separate output-enable inputs for each 8-bit segment.

Feature Summary

• High-bandwidth data path supporting up to 500 MHz bandwidth
• Rail-to-rail switching capability across 0- to 5-V levels
• Low input/output capacitance minimizes signal distortion
• Ioff circuitry enables partial-power-down mode operation

Applications

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

Procurement Notes

Verify the GKE suffix indicates the LFBGA package configuration. Confirm the ZKE suffix variant availability if lead-free specifications are required. Ensure control inputs are tied to VCC or GND during operation to prevent undefined states. Check datasheet SCES622 for thermal guidelines and PCB design requirements specific to the LFBGA footprint.

Selection Notes

Select this component for applications requiring widebus configurations with minimal signal degradation. The device accommodates both digital and analog signals due to its rail-to-rail switching range. Verify that the operating temperature range of -40°C to 85°C meets environmental constraints. Consider the 5-V tolerant control inputs for compatibility with standard logic families without level shifting.

Part Context

This part belongs to Texas Instruments' CB3Q family, designed for high-performance signal switching. It integrates a charge pump to elevate gate voltage, ensuring flat ON-state resistance characteristics. The Widebus+ architecture allows flexible configuration of multiple 8-bit buses into larger word sizes for data-intensive computing systems.

Replacement Considerations

SN74CB3Q32245ZKER