DG221BDY-T1-E3

Analog Switches, Multiplexers, Demultiplexers Overview

The DG221BDY-T1-E3 is a quad single-pole, single-throw (SPST) CMOS analog switch manufactured by Vishay Siliconix. It integrates independent onboard latches and a common write (WR) pin, enabling memory mapping and simultaneous switching of all channels as a single data byte. The device features a typical on-resistance of 60 ohms and handles continuous currents up to 20 mA. It operates with dual supplies ranging from ±4.5 V to ±15 V or a single supply up to 30 V. Key electrical parameters include a maximum turn-on time of 550 ns, off-isolation of 70 dB at 100 kHz, and charge injection of 20 pC.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Integrates independent onboard latches for each channel controlled by a common WR pin
• Provides true bidirectional signal switching capability in the on condition
• Includes an internal 5 V regulator to maintain TTL compatibility across wide power supply ranges
• Features an epitaxial layer structure designed to prevent latchup

Analog Switches, Multiplexers, Demultiplexers Applications

• Microprocessor-based systems requiring direct bus interfacing
• Automatic test equipment for signal routing
• Data acquisition systems
• Communication systems
• Medical instrumentation

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify that the component suffix matches the exact package type required for the design. Confirm RoHS compliance status through official manufacturer documentation before finalizing procurement. Ensure the ordering code corresponds to the specific tape and reel configuration needed for assembly processes.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when microprocessor-controlled analog switching with integrated memory is required. The built-in latches eliminate the need for external latch circuits, simplifying board layout. Verify that the analog signal range fits within the specified supply voltage limits to ensure proper operation without exceeding absolute maximum ratings.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the DG221B family of quad SPST analog switches. The 'DY' suffix indicates a 16-pin Narrow SOIC package, while 'T1' denotes tape and reel packaging. The '-E3' suffix signifies lead-free construction compliant with RoHS standards. It serves as a latchable alternative to non-latching variants like the DG201 series.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

DG221BDJ-E3: Identical functional specifications but housed in a 16-pin Plastic DIP package instead of SOIC.