SN74CB3Q3244GQNR

Overview

The SN74CB3Q3244GQNR is an automotive-grade, high-bandwidth FET bus switch from Texas Instruments. It features a charge pump for low and flat ON-state resistance (ron = 4 Ω typical) and supports rail-to-rail switching on data I/O ports with 5-V tolerant inputs. The device operates within a VCC range of 2.3 V to 3.6 V and provides bidirectional data flow with near-zero propagation delay (tpd = 0.12 ns typical). It includes undershoot clamp diodes, low input/output capacitance (Cio(OFF) = 3.5 pF typical), and supports partial-power-down mode via Ioff circuitry.

Feature Summary

• High-bandwidth data path supporting up to 500 MHz
• Low and flat ON-state resistance characteristics over the operating range
• Rail-to-rail switching capability on data I/O ports
• Bidirectional data flow with near-zero propagation delay

Applications

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

Procurement Notes

Verify that the specific GQNR suffix corresponds to the VFBGA package variant when sourcing. Confirm the component meets automotive qualification standards required for your application environment. Ensure control inputs are properly terminated to prevent floating states during power transitions.

Selection Notes

Select this component for applications requiring high-speed signal routing with minimal distortion. The integrated charge pump ensures consistent performance across voltage variations. Verify that the 5-V tolerant I/Os align with the signaling levels present in your system architecture.

Part Context

This part belongs to the SN74CB3Q series, which is designed for automotive and industrial environments. It utilizes FET technology to provide superior signal integrity compared to standard bipolar switches. The device is organized as two independent 4-bit bus switches or one 8-bit switch.

Replacement Considerations

SN74CB3Q3244RGYR

FAQ

How does the device handle partial-power-down conditions?

The device incorporates Ioff circuitry that prevents damaging current backflow through the switch when powered down, ensuring isolation.

What is the maximum switching frequency for the control input?

The maximum switching frequency for the OE control input is 20 MHz.