DG9409DN-T1-E4

Overview

The DG9409DN-T1-E4 is a dual 4-channel differential analog multiplexer manufactured by Vishay Siliconix using BiCMOS technology. It connects one of four differential inputs to a common dual output via a 2-bit binary address (A0, A1). The device operates on single supplies from 2.7 V to 12 V or dual supplies from ±3 V to ±6 V. Key electrical parameters include a maximum on-resistance of 25.5 Ω at 3 V supply, transition times up to 182 ns, and off-isolation of -80 dB. It features break-before-make switching, TTL/CMOS compatibility, and is housed in a 16-pin QFN package.

Feature Summary

• Dual 4-channel differential configuration with 2-bit binary addressing
• BiCMOS fabrication for low on-resistance and fast switching speeds
• Guaranteed break-before-make action to prevent momentary crosstalk
• Compatible with TTL, CMOS, and LV logic levels

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 against current Vishay documentation to confirm lead-free terminations and package variations. Confirm availability status as distribution channels may list this component as obsolete or restricted. Ensure the selected variant matches the required operating temperature range and voltage specifications for the target application environment.

Selection Notes

Select the DG9409DN-T1-E4 when differential signal routing is required within a compact surface-mount footprint. Evaluate the on-resistance flatness and leakage currents against the specific supply voltage conditions of the design. Ensure the digital control interface aligns with the system's logic voltage levels, particularly at lower supply voltages where thresholds shift.

Part Context

This component belongs to the DG940x series of precision low-voltage analog multiplexers. It shares the same die and core architecture as the DG9408 but differs in channel count and configuration. Both devices utilize the same 16-pin QFN package and are designed for applications requiring high accuracy and low power consumption in portable electronics.

Replacement Considerations

DG9408DN-T1-E4: Single-ended 8-channel version with identical pinout and electrical characteristics.

FAQ

What is the function of the EN pin?

The EN pin enables or disables all switches simultaneously. When EN is low, all switches are turned off regardless of the address inputs.

How does the DG9409 handle signal clamping?

Signals on the source (S) or drain (D) pins exceeding the supply rails (V+ or V-) will be clamped by internal diodes to protect the device.

What is the typical charge injection value?

The typical charge injection is 29 pC at room temperature with a 1 nF load capacitance, though it varies with supply voltage and temperature.