DG444BDY

Overview

The DG444BDY is a monolithic quad SPST CMOS analog switch manufactured by Vishay Siliconix in a 16-pin narrow SOIC package. It provides high-speed switching with a typical turn-on time of 120 ns and maximum of 300 ns, alongside a typical turn-off time of 60 ns and maximum of 200 ns. The device features a typical on-resistance of 45 Ω (maximum 80 Ω at room temperature) and low power consumption of 1 mW. It operates on dual supplies ranging from ±15 V to ±20 V or a single supply up to 12 V. Key electrical parameters include an off-isolation of -90 dB at 100 kHz, charge injection of 1 pC, and a continuous current rating of 30 mA.

Feature Summary

• High-speed switching action suitable for data acquisition and communication systems
• Low on-resistance and low power consumption for reduced signal errors
• Minimized charge injection optimized for sample-and-hold circuits
• TTL/CMOS-compatible logic for simple interfacing

Applications

• Audio switching
• Data acquisition systems
• Sample-and-hold circuits
• Communication systems
• Automatic test equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and environmental compliance. The base part number DG444BDY corresponds to the 16-pin Narrow SOIC variant. Confirm RoHS status and lead-free designation through the designated E3 suffix if required. Ensure the selected revision matches the design requirements for voltage ratings and thermal characteristics.

Selection Notes

Select this component when low on-resistance and fast switching speeds are critical for analog signal integrity. The DG444B is appropriate for applications requiring TTL/CMOS logic compatibility and minimal charge injection. Verify that the operating voltage range and power dissipation limits align with the system's supply rails and thermal management capabilities before integration.

Part Context

The DG444B is an improved version of the original DG444 analog switch, offering enhanced performance characteristics. It belongs to the DG44x family of quad SPST switches from Vishay Siliconix. The device utilizes a high-voltage silicon-gate process with an epitaxial layer to prevent latchup, ensuring reliable operation across the specified industrial temperature range.

Replacement Considerations

The DG445B is a complementary part within the same series, featuring inverted logic control compared to the DG444B. Designers should verify logic polarity requirements when substituting between these variants. Other members of the DG44x family may offer different pinouts or electrical specifications.