DG308BDY

Overview

The DG308BDY is a quad single-pole single-throw (SPST) analog switch manufactured by Vishay Siliconix in a 16-pin Narrow SOIC package. It operates on dual supplies ranging from ±4 V to ±22 V or a single supply of 4 V to 44 V. The device features a maximum drain-source on-resistance of 85 Ω at room temperature and up to 100 Ω across the full operating range. Switching times are specified with a maximum turn-on time of 200 ns and a turn-off time of 150 ns under dual supply conditions. Power dissipation for this package is rated at 640 mW, and it supports an extended industrial temperature range from -40 °C to +85 °C.

Feature Summary

• CMOS compatible logic interface for simple control integration
• Improved charge injection compensation design minimizes switching transients
• Epitaxial layer construction prevents latchup during operation
• True bi-directional signal handling capability in the on condition

Applications

• Industrial instrumentation signal routing
• Test equipment multiplexing
• Sample-and-hold circuits
• Communications systems
• Computer peripherals

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as standard suffixes may vary. Ensure proper ESD handling protocols are followed during storage and assembly. Review datasheet derating curves for power dissipation above 75 °C to maintain reliability standards.

Selection Notes

Select the DG308BDY when low on-resistance and fast switching speeds are required for analog signal paths. Consider the narrow SOIC package for space-constrained surface mount designs. Verify that the application voltage does not exceed the ±22 V rating. Compare against DG308A if higher leakage tolerance is acceptable for cost reduction.

Part Context

This component belongs to the DG308B series, representing an improved version of the industry-standard DG308A. It utilizes Vishay Siliconix proprietary silicon gate CMOS process technology. The series is designed for telecommunications, process control, and computer peripheral applications requiring high accuracy and reduced power consumption.

Replacement Considerations

DG308BDJ-E3 (PDIP-16)

FAQ

What is the maximum analog signal range supported by the DG308BDY?

The device supports an analog signal range from -15 V to +15 V under dual supply conditions, or 0 V to 12 V under single supply operation.

How does the DG308BDY handle signals exceeding the supply rails?

Signals on source or drain terminals exceeding V+ or V- will be clamped by internal diodes. Forward diode current must be limited to maximum ratings to prevent damage.

What is the typical charge injection value for this switch?

The typical charge injection is 1 pC under dual supply conditions with a load capacitance of 1000 pF.