SN74CB3Q3244ZQNR

Overview

The SN74CB3Q3244ZQNR is an active 8-bit FET bus switch in a VFBGA package. It operates with a supply voltage (VCC) range of 2.3 V to 3.6 V and supports data I/O voltages from 0 V to 5.5 V. The device features low on-state resistance (ron), typically 4 Ω at VCC = 3 V, and low input/output capacitance (Cio(OFF)), typically 3.5 pF. It includes undershoot clamp diodes on data and control inputs, supports partial-power-down mode via Ioff circuitry, and provides latch-up performance exceeding 100 mA per JESD 78 Class II.

Feature Summary

• High-bandwidth data path utilizing a charge pump for flat ON-state resistance
• 5-V tolerant I/Os allowing operation with powered up or powered down devices
• Rail-to-rail switching capability on data ports across the operating voltage range
• Bidirectional data flow with near-zero propagation delay

Applications

• Broadband communications systems
• Networking equipment interfaces
• Data-intensive computing systems
• Bus isolation and memory interleaving

Procurement Notes

Verify the specific ZQN package variant against the official Texas Instruments ordering information to ensure correct pinout and marking. Confirm RoHS compliance status and moisture sensitivity level requirements prior to integration into the manufacturing process.

Selection Notes

Select this component for applications requiring high-speed signal gating with minimal distortion. Ensure the control logic levels are compatible with TTL or 5-V/3.3-V CMOS outputs. Verify that the operating temperature range meets the system's environmental specifications.

Part Context

This device belongs to the SN74CB3Q family of low-voltage, high-bandwidth bus switches. It is designed to provide optimized interface solutions for digital and analog applications, offering superior signal integrity compared to standard logic switches due to its low capacitance and flat resistance characteristics.

Replacement Considerations

Public confirmed substitute part numbers: SN74CB3Q3244RGYR, SN74CB3Q3244DBQR, SN74CB3Q3244DGVR, SN74CB3Q3244PWR.