SN74CB3Q3245DBQR

Overview

The SN74CB3Q3245DBQR is an 8-bit FET bus switch in a 20-pin SSOP package. It operates on a single supply voltage ranging from 2.3V to 3.6V. The device supports bidirectional data flow with near-zero propagation delay, typically 0.12ns to 0.20ns. It features low and flat ON-state resistance (ron) of 4Ω typical at VCC=2.5V. Data I/Os support 0V to 5V signaling levels, providing 5V tolerance even when the device is powered down. The input/output capacitance is 3.5pF typical.

Feature Summary

• High-bandwidth data path supporting up to 500MHz
• Rail-to-rail switching capability on data I/O ports
• Low and flat ON-state resistance characteristics over operating range
• Supports partial-power-down mode operation via Ioff circuitry

Applications

• PCI Interface
• Differential Signal Interface
• Memory Interleaving
• Bus Isolation
• Low-Distortion Signal Gating

Procurement Notes

Verify the specific ordering suffix 'DBQR' corresponds to the SSOP-20 package with tape and reel packaging containing 2500 units. Confirm that the lead finish is NIPDAU and the moisture sensitivity level is Level-2. Ensure the component status is listed as Active for production requirements.

Selection Notes

Select this component for applications requiring high bandwidth and low signal distortion. It is suitable for broadband communications and networking systems. Verify that the control inputs can be driven by TTL or 5V/3.3V CMOS outputs. Ensure the system design accommodates the 2.3V to 3.6V supply voltage range.

Part Context

This device belongs to the SN74CB3Q3245 family of 8-bit FET bus switches. It utilizes a charge pump to elevate the gate voltage of the pass transistor, ensuring low and flat ON-state resistance. This technology minimizes propagation delay and supports rail-to-rail switching, making it optimized for high-speed data-intensive computing systems.

Replacement Considerations

The datasheet explicitly states the device is equivalent to the IDTQS3VH384.