DG409CY

Overview

The DG409CY+ is a dual 4:1 CMOS analog multiplexer switch manufactured by Analog Devices Inc./Maxim Integrated. It features two independent switches, each selecting one of four inputs for a common output. The device operates on a single supply voltage ranging from 5 V to 30 V or dual supplies from ±5 V to ±20 V. Key electrical specifications include a maximum on-resistance of 100 Ohms, a maximum charge injection of 2 pC, and an off-state leakage current of 500 pA. Switching times are specified with a maximum turn-on time of 150 ns and a maximum turn-off time of 150 ns. The component is housed in a die package and supports an operating temperature range of 0°C to 70°C.

Feature Summary

• Dual independent 4-to-1 channel switching architecture
• Low charge injection capability for signal integrity
• CMOS technology ensuring low power consumption
• High isolation performance with minimal off-state leakage

Applications

• Data acquisition systems requiring multi-channel input selection
• Audio signal routing and switching applications
• Instrumentation front-end multiplexing
• Industrial control system signal conditioning

Procurement Notes

Verify the specific suffix requirements for the ordered part number, as packaging and availability may vary between tape-and-reel and tray configurations. Confirm RoHS compliance status and lead times directly with authorized distributors, as stock levels fluctuate. Ensure the selected variant matches the required package type and temperature rating for the intended application environment before finalizing procurement orders.

Selection Notes

Select this component when a compact solution for dual 4:1 signal routing is required within standard industrial temperature limits. The 100 Ohm on-resistance suits moderate precision applications, while the low charge injection benefits high-fidelity signal paths. Consider the die package constraints for PCB layout and thermal management. Evaluate against higher-speed or lower-resistance alternatives if signal fidelity requirements exceed the capabilities of this CMOS architecture.

Part Context

The DG409 belongs to the improved CMOS multiplexer family from Maxim Integrated, designed for general-purpose analog switching. It complements other devices like the DG408 and DG406 by offering a balanced trade-off between speed, resistance, and channel count. As a dual 4:1 switch, it provides efficient space utilization compared to discrete solutions, fitting into broader signal chain designs where multiple independent signal paths must be managed efficiently.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.