FST34X2245QSP

Overview

The FST34X2245QSP is a high-speed CMOS bus switch manufactured by Fairchild Semiconductor. It provides 32 bits of switching capability arranged in an 8 x 1:1 circuit configuration across four independent circuits. The device operates with a single voltage supply and features standard output types. It is housed in an 80-pin QVSOP package with a width of 3.90mm. The component includes 25-ohm series resistors integrated into the outputs to manage signal integrity.

Feature Summary

• Provides 32-bit high-speed CMOS TTL-compatible bus switching
• Features low on-resistance for efficient signal transmission
• Integrates 25-ohm series resistors within the output paths
• Supports standard flow-through mode operation

Applications

• High-speed data bus switching applications
• TTL-compatible logic interface systems
• CMOS circuit signal routing
• Electronic components requiring low on-resistance switching

Procurement Notes

Verify the manufacturer part number against official Fairchild Semiconductor documentation to ensure authenticity. Confirm the package type matches the required 80-QVSOP specification. Check for any specific ordering suffixes that may indicate variations in tape and reel packaging or temperature ratings. Ensure the component meets the required electrical specifications for your design before procurement.

Selection Notes

Select this component when a 32-bit bus switch with integrated series resistors is required. The low on-resistance characteristic makes it suitable for applications demanding minimal signal loss. Ensure the system voltage aligns with the single supply requirement. Consider the 80-pin QVSOP package constraints for PCB layout and thermal management during the selection process.

Part Context

This device belongs to the FST34X series of bus switches from Fairchild Semiconductor. It is designed for high-speed digital applications requiring reliable signal switching. The series typically offers CMOS compatibility and low power consumption. The specific model integrates output resistors, distinguishing it from basic bus switches without such protection or impedance matching features.

Replacement Considerations

Consult official Fairchild Semiconductor substitution guides for verified alternatives. Ensure any replacement maintains the 32-bit capacity and 80-QVSOP package form factor. Verify that the substitute component supports the same TTL-compatible logic levels and single-supply operation requirements.