DG412EJ

Overview

The DG412EJ is a monolithic quad single-pole single-throw (SPST) CMOS analog switch manufactured by Harris Corporation. It integrates four independent switches within a 16-pin DIP package, designed for TTL and CMOS compatible digital inputs. The device supports split or single power supply operation ranging from ±5V to ±20V, allowing control of signals up to 40V peak-to-peak. Key electrical characteristics include a maximum on-resistance of 100Ω, low charge injection, and fast switching times with a maximum turn-on time of 175ns and turn-off time of 145ns. It operates reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Monolithic integration of four independent SPST analog switches in a single package
• TTL and CMOS logic compatibility for flexible digital interface control
• Low power consumption suitable for battery-operated applications
• Epitaxial layer construction prevents latch-up associated with older CMOS technologies

Applications

• Sample and hold circuits requiring low charge injection
• Data acquisition systems utilizing high-speed signal routing
• Instrumentation requiring precise analog signal switching
• Communication equipment for channel selection

Procurement Notes

Verify the manufacturer origin carefully, as the DG412 series was originally developed by Intersil and later acquired by Harris Corporation, which was subsequently acquired by Renesas Electronics. Confirm that the specific DG412EJ suffix corresponds to the PDIP package and standard operating specifications. Ensure compliance with current RoHS directives if applicable to the production batch. Cross-reference datasheets from authorized distributors to confirm availability status and lead times.

Selection Notes

Select the DG412EJ when a quad SPST configuration is required with CMOS/TTL input compatibility. Choose this component over the DG413 if uniform positive logic control is needed for all four channels. Consider the DG411 series if lower on-resistance (35Ω) and faster switching speeds are critical requirements. Ensure the application voltage does not exceed the 44V maximum rating and that the power dissipation remains within limits for the DIP package.

Part Context

The DG412 series serves as a drop-in replacement for the popular DG211 and DG212 devices, offering improved performance through a high-voltage silicon-gate process. While functionally similar to the DG411, the DG412 utilizes positive logic for switch activation. This family is widely used in industrial and commercial electronics where reliable analog signal path switching is necessary without introducing significant distortion or latency.

Replacement Considerations

The DG411 is a functional equivalent but differs in logic polarity. The DG413 offers mixed logic options for break-before-make configurations. Verify pinout compatibility before substitution. Check for updated manufacturing sources under Renesas Electronics ownership.