DG442BDY

Overview

The DG442BDY 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 on-resistance of 80 Ω at ±15 V dual supply. The device operates within an analog signal range of -15 V to +15 V under dual supply conditions, or 0 V to 12 V under single supply. Power consumption is low at 1 mW, with supply currents typically 1 µA. Charge injection is minimized to -1 pC, making it suitable for sample-and-hold applications.

Feature Summary

• Monolithic quad SPST configuration designed for high-speed analog and audio signal switching
• Low power consumption with TTL/CMOS-compatible logic inputs for simple interfacing
• Minimized charge injection on the drain terminal to reduce pedestal errors in sample-and-hold circuits
• Epitaxial layer construction prevents latchup while supporting high-voltage silicon-gate process

Applications

• Data Acquisition Systems
• Communication Systems
• Automatic Test Equipment
• Medical Instrumentation
• Sample-and-Hold Circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and compliance status. The base part number corresponds to the 16-pin Narrow SOIC variant. Confirm RoHS compliance requirements as indicated by suffixes such as -E3 in official datasheets. Ensure the component meets the required operating temperature range of -40 °C to +85 °C for the intended application environment.

Selection Notes

Select the DG442BDY when low on-resistance and fast switching speeds are required for analog signal routing. Compare the 80 Ω maximum on-resistance against system tolerance requirements. Verify that the 120 ns typical turn-on time meets the throughput needs of the application. Consider the single supply capability if power supply constraints exist, noting the reduced analog signal range compared to dual supply operation.

Part Context

The DG442BDY belongs to the DG441B/DG442B series, which are improved upgrades to the original DG441/DG442 models. This series is designed to provide high-speed switching with low error characteristics. The DG442B variant specifically features inverted logic control compared to the DG441B, where a logic '1' turns the switch off and a logic '0' turns it on.

Replacement Considerations

Public confirmed substitute part numbers include DG442BDN-T1-E4 (QFN-16 package) and DG442BDJ (16-pin Plastic DIP). These variants share the same core electrical specifications but differ in physical package dimensions and pinout compatibility.