DG421DY+

Analog Switches, Multiplexers, Demultiplexers Overview

The DG421DY+ is a dual single-pole/single-throw (SPST) normally open CMOS analog switch manufactured by Analog Devices Inc./Maxim Integrated. It features latchable logic inputs for microprocessor interfacing and operates from a single +10V to +30V supply or bipolar ±4.5V to ±20V supplies. The device guarantees an on-resistance of 35Ω maximum, with a channel-to-channel match of 3Ω maximum and flatness of 4Ω maximum over the signal range. Switching times are 250ns for turn-on and 200ns for turn-off. It offers low charge injection of 15pC maximum, off-leakage current less than 5nA at +85°C, and ESD tolerance of 2000V minimum. The component is housed in a 16-SOIC package and supports an operating temperature range of -40°C to +85°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Features latchable logic inputs that simplify direct interfacing with microprocessors.
• Provides guaranteed on-resistance matching between channels and flatness over the signal range.
• Supports rail-to-rail signal handling capabilities with single or bipolar power supplies.

Analog Switches, Multiplexers, Demultiplexers Applications

• Sample-and-Hold Circuits
• Battery-Operated Systems
• Audio Signal Routing

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix 'DY+' against the manufacturer's official documentation to confirm the 16-SOIC package and -40°C to +85°C temperature range. Confirm RoHS compliance status as indicated in the ordering information table. Ensure the source document explicitly identifies this part number before procurement.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select the DG421DY+ when dual SPST switching with latched control signals is required. It is suitable for applications needing low power consumption and high ESD protection. Verify that the 35Ω on-resistance and 250ns switching speed meet the system timing requirements. Ensure the voltage supply range aligns with the single or bipolar operation specifications.

Analog Switches, Multiplexers, Demultiplexers Part Context

The DG421DY+ belongs to the DG421/DG423/DG425 family of improved low-power CMOS analog switches. This series was redesigned to offer better on-resistance matching and lower leakage currents compared to previous generations. The DG421 specifically provides two SPST switches per package, distinguishing it from the DPST DG425 and SPDT DG423 variants within the same family.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Publicly confirmed substitute part numbers for the DG421DY+ are not available in the provided documentation. Consult the manufacturer's official resources for potential replacements if this component is obsolete.

Analog Switches, Multiplexers, Demultiplexers FAQ

What is the maximum on-resistance for the DG421DY+?

The maximum on-resistance (rDS(ON)) for the DG421DY+ is 35Ω.

Does the DG421DY+ support TTL logic levels?

Yes, the device maintains TTL compatibility with supplies anywhere in the ±4.5V to ±20V range as long as VL = +5V.

What is the ESD tolerance of the DG421DY+?

The device has an ESD tolerance of 2000V minimum per Method 3015.7.