DG221BDY-E3

Analog Switches, Multiplexers, Demultiplexers Overview

The DG221BDY-E3 is a monolithic quad single-pole, single-throw (SPST) CMOS analog switch manufactured by Vishay Siliconix. It features independent onboard latches and a common write pin, allowing memory mapping as a single data byte for simultaneous switching. The device operates with dual supplies ranging from -15 V to +15 V. Key electrical parameters include a maximum on-resistance of 90 Ω at full temperature range, a maximum turn-on time of 550 ns, and a maximum turn-off time of 340 ns. It handles continuous currents up to 20 mA and draws a maximum supply current of 1.5 mA. The component is housed in a 16-pin Narrow SOIC package and supports an operating temperature range of -40 °C to +85 °C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Integrates independent onboard latches with a common write pin for microprocessor bus compatibility.

Analog Switches, Multiplexers, Demultiplexers Applications

• Microprocessor-based systems
• Automatic test equipment
• Communication systems
• Data acquisition systems

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the RoHS compliance status directly with the manufacturer or authorized distributors, as historical documentation indicates potential variations between leaded and lead-free terminations. Confirm that the specific ordering suffix corresponds to the desired packaging format and environmental rating before finalizing procurement orders.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when designing circuits requiring precise signal routing controlled via digital logic interfaces. Ensure the application voltage does not exceed the absolute maximum ratings of 34 V across V+ and V-. Verify that the required switching speed meets the 550 ns turn-on time specification and that the load current remains within the 20 mA continuous limit.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the DG221B series of quad SPST analog switches. It is functionally similar to other devices in the family but distinguished by its integrated latch architecture. The E3 suffix denotes a lead-free version compliant with RoHS standards, while the DY suffix specifies the 16-pin Narrow SOIC surface-mount package.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The DG221BDJ-E3 serves as a direct replacement offering identical electrical characteristics in a 16-pin Plastic DIP package. Designers must account for the physical footprint differences between the SOIC and DIP packages during board layout modifications.

Analog Switches, Multiplexers, Demultiplexers FAQ

How does the WR pin control the switch state?

When the WR pin is low, the input latches are transparent, allowing the INX pins to set the switch state. When WR is high, the latches maintain the previous state regardless of changes on the INX inputs.

What is the typical on-resistance value?

The typical on-resistance is 60 Ω at room temperature. The maximum on-resistance increases to 90 Ω across the full specified temperature range.

Can the device handle bidirectional signals?

Yes, the DG221BDY-E3 features true bidirectional performance in the on condition, allowing signals to flow freely between the source and drain terminals.