FST32X245QSP

Overview

The FST32X245QSP is a high-speed CMOS QuickSwitch double-width bus switch manufactured by Fairchild Semiconductor. It integrates sixteen independent bidirectional bus switches within a single package, designed to facilitate efficient data transfer across digital systems. The device features enhanced N-channel field-effect transistors that eliminate inherent diodes to the power supply rail, ensuring signal integrity without parasitic conduction paths. This architecture supports low noise operation and minimal propagation delay, making it suitable for applications requiring rapid switching and isolation between different voltage domains or bus segments.

Feature Summary

• Integrates sixteen high-speed CMOS TTL-compatible bus switches in a flow-through pinout configuration
• Features enhanced N-channel FETs with no inherent diode to VCC for improved signal integrity
• Provides low ON-resistance to connect inputs to outputs without adding propagation delay
• Includes undershoot clamp diodes on all switch and control inputs to protect against voltage spikes

Applications

• Hot-swapping and hot-docking interfaces
• Voltage translation between 5V and 3.3V domains
• Bus switching and isolation in complex digital systems

Procurement Notes

Verify the specific suffix QSP against official Fairchild or ON Semiconductor documentation to confirm package type and tape/reel specifications. Ensure compatibility with RoHS standards if required by your application. Cross-reference the part number with current manufacturer catalogs as Fairchild products are now managed under the ON Semiconductor brand portfolio.

Selection Notes

Select this component when designing circuits that require multiple bidirectional bus switches with low insertion loss. The double-width package allows for compact board layouts while maintaining high-speed performance. Consider the operating temperature range and voltage levels to ensure the device meets the environmental and electrical requirements of the target system.

Part Context

This component belongs to the QuickSwitch family of bus switches, which are engineered to provide faster switching speeds than conventional logic devices. The series is widely used in portable electronics and computer peripherals where space constraints and power efficiency are critical design factors.