DG408LDY

Overview

The DG408LDY is an 8-channel single-ended analog multiplexer manufactured by Vishay Siliconix. It operates on a single supply voltage ranging from 2.7 V to 12 V or dual supplies of ±3 V to ±6 V. The device features a typical drain-source on-resistance (RDS(on)) of 17 Ω, with maximum values up to 80 Ω depending on supply conditions. Switching performance includes an enable turn-on time (tON) of 38 ns and an enable turn-off time (tOFF) of 18 ns at room temperature. It offers low leakage current (max 1 nA), minimal charge injection (1 pC), and high off-isolation (82 dB at 1 MHz). The component is housed in a 16-pin SOIC package and supports TTL, CMOS, and LV logic interfaces.

Feature Summary

• Pin-for-pin compatible with industry standard DG408 devices while offering improved electrical performance metrics.
• Utilizes BiCMOS wafer fabrication technology to support both single and dual power rail configurations.
• Incorporates guaranteed break-before-make switching action to prevent momentary crosstalk between adjacent channels.

Applications

• Data acquisition systems
• Battery operated equipment
• Portable test equipment
• Sample and hold circuits
• Audio and video signal routing

Procurement Notes

Verify the specific ordering suffix to confirm the package type and RoHS compliance status. The base part number DG408LDY corresponds to the 16-pin SOIC variant. Confirm that the intended application environment falls within the specified -40 °C to +85 °C operating temperature range. Ensure power supply rails remain within the absolute maximum ratings to prevent permanent damage.

Selection Notes

Select this component when a low-voltage, high-performance analog switch is required for single-ended signal routing. It serves as a direct upgrade to the legacy DG408, providing lower on-resistance and faster switching speeds. Verify that the logic interface levels match the system's digital control voltages, particularly at lower supply voltages where thresholds shift.

Part Context

The DG408L series represents a low-voltage enhancement of the classic DG408 multiplexer family. Manufactured using BiCMOS technology, it delivers superior speed and isolation compared to its predecessors. The DG408LDY specifically denotes the 16-lead Small Outline Integrated Circuit (SOIC) package version, designed for surface-mount applications requiring compact footprints.

Replacement Considerations

DG408DY-E3

FAQ

Does the DG408LDY support dual power supplies?

Yes, the device supports dual supply operation with recommended voltages ranging from ±3 V to ±6 V.

What is the maximum analog signal range for the DG408LDY?

The analog signal range extends from the negative supply rail (V-) to the positive supply rail (V+), allowing full utilization of the available supply voltage window.

How does the DG408LDY handle channel switching transitions?

It employs a break-before-make switching mechanism, which guarantees that one channel disconnects before another connects, thereby eliminating momentary crosstalk.