DG221BDY-T1

Analog Switches, Multiplexers, Demultiplexers Overview

The DG221BDY-T1 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, supporting 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 with a power dissipation of 600 mW in the SOIC-16 package.

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 component authenticity through authorized distributors or official manufacturer channels. Confirm RoHS compliance status and lead-free suffixes against current datasheets. Check for end-of-life notices or obsolescence warnings before finalizing procurement plans.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when precise analog signal routing requires integrated digital control logic within a single package. Ensure supply voltages remain within the specified ±15 V limits to maintain optimal on-resistance and switching performance characteristics.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the DG221B family of quad SPST analog switches. It shares functional similarities with other devices in the series but is distinguished by its specific latch architecture and SOIC-16 surface-mount packaging configuration.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Direct substitutes may include DG221BDJ-E3 for DIP packages or DG221BDY-E3 for tape-and-reel SOIC variants. Verify pinout compatibility and latch functionality before implementation.

Analog Switches, Multiplexers, Demultiplexers FAQ

How does the write (WR) pin affect the switch state?

When WR is low, the input latches are transparent, allowing data to pass through. When WR goes high, the selected state is latched, maintaining the switch position until the next write cycle.

What is the maximum analog voltage range supported?

The device supports an analog signal range equal to the supply rails, typically up to ±15 V when powered by ±15 V supplies.