FSTUD16450MTDX

Overview

The FSTUD16450MTDX is a bus switch manufactured by Fairchild Semiconductor, belonging to the FSTUD logic family. It features two independent circuits, each configured as a 10-bit wide 1:1 bidirectional switch. The device operates on a single supply voltage ranging from 4V to 5.5V and supports surface-mount installation in a 56-TSSOP package with dimensions of 6.10mm width. It functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides two independent 10-bit bidirectional bus switching channels for signal routing
• Operates on a single power supply voltage between 4V and 5.5V
• Designed for surface-mount assembly in a compact 56-pin TSSOP package

Applications

• Bidirectional data bus switching in high-speed digital systems
• Signal isolation and routing in communication interfaces
• Power management circuits requiring low-on-resistance switching

Procurement Notes

Verify the manufacturer designation carefully, as this component is associated with both Fairchild Semiconductor and onsemi due to corporate acquisition history. Confirm the specific datasheet version matches your design requirements. Note that some distributor listings may indicate the part status as obsolete or discontinued; check current availability and lead times directly with authorized suppliers before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring dual 10-bit bidirectional switches with a 4V to 5.5V supply range. Ensure the application environment stays within the -40°C to +85°C operating temperature limits. Verify that the 56-TSSOP package footprint aligns with the PCB layout constraints. Consider the propagation delay characteristics if timing sensitivity is critical for the target bus interface speed.

Part Context

This component belongs to the FSTUD series of bus switches, which are optimized for low on-resistance and fast switching speeds. The series typically serves applications needing efficient signal routing between different voltage domains or isolated sections of a circuit board. The 56-pin configuration allows for high-density integration compared to smaller packages, supporting wider data buses without increasing board space significantly.

Replacement Considerations

Check for direct pin-compatible substitutes within the same FSTUD family or equivalent offerings from other manufacturers. Verify that any replacement maintains the 4V-5.5V supply range and 10-bit channel count. Ensure the alternative package matches the 56-TSSOP form factor to avoid PCB redesign.