DG221BDY

Analog Switches, Multiplexers, Demultiplexers Overview

The DG221BDY 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 (WR) pin, allowing memory mapping and simultaneous switching of all channels as a single data byte. The device operates with dual supplies ranging from ±4.5 V to ±15 V, providing an analog signal range of ±15 V. Key electrical parameters include a maximum on-resistance of 90 Ω at full temperature, turn-on time of 550 ns, and turn-off time of 340 ns. It handles continuous currents up to 20 mA and draws a maximum supply current of 1.5 mA.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Integrates independent onboard latches for each channel controlled by a common WR pin, enabling direct microprocessor bus interfacing.

Analog Switches, Multiplexers, Demultiplexers Applications

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

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix 'DY' confirms the 16-pin Narrow SOIC package configuration. Confirm RoHS compliance status, as standard versions may contain lead; Pb-free variants require the '-E3' suffix. Validate that the component meets the required operating temperature range of -40 °C to +85 °C for the intended application environment.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when bidirectional switching and latchable control are required for microprocessor-controlled signal routing. Ensure the system voltage does not exceed the ±15 V limit. Consider the 90 Ω maximum on-resistance and 550 ns switching speed against application requirements. Verify power dissipation limits within the SOIC-16 package constraints.

Analog Switches, Multiplexers, Demultiplexers Part Context

The DG221B belongs to the DG series of quad SPST analog switches from Vishay Siliconix. This family provides precision switching capabilities for instrumentation and process control systems. The DG221BDY specifically denotes the surface-mount variant in a narrow SOIC package, offering a compact solution for high-density circuit designs requiring isolated channel control.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

DG221BDJ-E3: Pin-compatible DIP alternative.

Analog Switches, Multiplexers, Demultiplexers FAQ

How is the state of the switches maintained?

Each channel has an independent onboard latch. The state is determined by the logic level on the INx pins when the WR pin is low.

What is the maximum analog signal voltage range?

The analog signal range extends from V- to V+, supporting up to ±15 V when powered by ±15 V supplies.

Does the device support bidirectional signal flow?

Yes, the DG221BDY features true bidirectional performance in the on condition.