SN74CB3Q3245PWRE4

Overview

The SN74CB3Q3245PWRE4 is an 8-bit FET bus switch in a 20-pin TSSOP package. It operates on a single supply voltage ranging from 2.3V to 3.6V. The device features bidirectional data flow with near-zero propagation delay, typically 0.12ns to 0.20ns. It supports rail-to-rail switching on data I/O ports, accommodating 0V to 5V signaling levels when powered by 3.3V. The ON-state resistance is typically 4Ω at VCC = 2.5V. Data and control inputs include undershoot clamp diodes.

Feature Summary

• High-bandwidth data path supporting up to 500MHz
• Low and flat ON-state resistance characteristics over the operating range
• 5V tolerant I/Os with device powered up or powered down
• Supports partial-power-down mode operation using Ioff

Applications

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

Procurement Notes

Verify the specific ordering suffix 'PWRE4' against the manufacturer's current Package Option Addendum to confirm active production status and tape-and-reel carrier specifications. Ensure the component meets RoHS compliance requirements and matches the specified MSL rating for your assembly process. Cross-reference the datasheet revision date to validate all electrical parameters before finalizing procurement.

Selection Notes

Select this component for broadband communications, networking, and data-intensive computing systems requiring optimized interfaces. The charge pump mechanism elevates gate voltage to provide low ON-state resistance. Verify that the control input voltage thresholds align with your system logic levels, as they vary based on the VCC supply range between 2.3V and 3.6V.

Part Context

This part belongs to the SN74CB3Q3245 family of 8-bit FET bus switches. The PWRE4 designation indicates a TSSOP-20 package configuration supplied in a tape-and-reel format. The device utilizes a charge pump to minimize signal distortion and capacitive loading on the data bus, distinguishing it from standard CMOS switches.

Replacement Considerations

The SN74CB3T3245 is electrically equivalent to this device. Verify pinout compatibility and ensure the replacement variant maintains the required 5V tolerance and low ON-state resistance specifications for your specific application environment.

FAQ

How does the device handle power-down states?

The device supports partial-power-down applications using Ioff circuitry, which prevents damaging current backflow through the device when powered down.

What is the maximum switching frequency for the control input?

The maximum switching frequency for the OE control input is 20MHz under recommended operating conditions.