DG445DY-E3

Overview

The DG445DY-E3 is a monolithic quad single-pole single-throw (SPST) CMOS analog switch manufactured by Vishay Siliconix. It features a normally open configuration and operates on a high-voltage silicon-gate process with an epitaxial layer to prevent latchup. The device supports single supplies from +5 V to +36 V or dual supplies from ±5 V to ±20 V. Key electrical parameters include a maximum drain-source on-resistance of 85 Ω, a maximum turn-on time of 250 ns, and a maximum turn-off time of 210 ns. It offers low leakage current and minimized charge injection for sample-and-hold applications.

Feature Summary

• High-speed switching with minimized charge injection suitable for precision signal routing
• TTL and CMOS logic compatible interface for simple digital control
• Epitaxial layer construction prevents latchup under high-voltage conditions

Applications

• Sample-and-hold circuits
• Data acquisition systems
• Audio switching
• Telecommunication systems
• Automatic test equipment

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and tape/reel specifications. Ensure that any alternative part numbers are cross-referenced with the manufacturer's datasheet to validate functional equivalence before procurement.

Selection Notes

Select this component when a normally open SPST configuration is required for upgrading legacy sockets. Verify that the application voltage range falls within the specified limits and that the logic input levels match the system requirements for proper switching thresholds.

Part Context

This component belongs to the DG44x series of quad analog switches. It shares the same physical footprint and pinout as the DG444 but differs in its internal logic state, providing a normally open function instead of a normally closed one.

Replacement Considerations

The DG444DY-E3 serves as a direct functional substitute if a normally closed configuration is acceptable. Other members of the DG44x family may be considered provided their electrical characteristics align with the design requirements.

FAQ

What is the difference between the DG444 and DG445?

The DG444 provides a normally closed function, while the DG445 provides a normally open function. Both share identical pinouts and electrical specifications.

Does the DG445 support single-supply operation?

Yes, the device supports single supply voltages ranging from +5 V to +36 V.

How does the device handle signals exceeding the supply rails?

Signals on the source or drain pins exceeding the supply levels will be clamped by internal diodes.