EM6420V1LF40D+

Overview

The EM6420V1LF40D+ is an ultra low power capacitive touch sensor interface IC manufactured by EM Microelectronic. It supports scanning up to 16 capacitive sensors sequentially, with parameters configurable via host microcontroller or hardware inputs. The device offers user-selectable supply voltage ranges of 1.2 V to 2.0 V or 2.2 V to 3.6 V. Power consumption reaches as low as 2.0 µA at 3.0 V in Ultra Low Power Mode for 16 sensors scanned at 8 Hz. It features multiple communication interfaces including 4-wire SPI, I2C, 4-bit parallel, and 8-bit direct output. The IC operates within a temperature range of -40°C to +85°C.

Feature Summary

• Supports up to 16 analog sensor inputs per device with scalable architecture for expanded sensor counts.
• Provides flexible connectivity through selectable communication interfaces such as SPI, I2C, and parallel modes.
• Delivers ultra-low current consumption optimized for battery-powered applications without requiring software tuning.
• Includes configurable interrupt request signals and active high enable input for system integration.

Applications

• Mobile phones and cordless phones
• PDAs and keyboards
• White goods and brown goods appliances
• Toys and lighting sliders for dimming

Procurement Notes

Verify the specific ordering suffix LF40D+ against the manufacturer's official documentation to confirm package type and compliance status. Ensure the selected supply voltage configuration matches the required operational range for your application design. Confirm availability of development tools if initial prototyping is planned.

Selection Notes

Select this component when designing capacitive touch interfaces requiring minimal external components and low power usage. Consider the available communication interfaces to match the host microcontroller capabilities. Evaluate the sensor count requirements, as multiple devices may be needed for configurations exceeding 16 sensors.

Part Context

The EM6420 series serves as a specialized ASIC for touch screen interfaces, focusing on low power consumption and ease of integration. It eliminates the need for complex software development for basic touch detection. The device is part of a broader family of touch solutions offered by EM Microelectronic, designed for consumer electronics and industrial applications.

Replacement Considerations

Consult the manufacturer's official documentation for confirmed substitute part numbers. Verify pin compatibility and electrical characteristics before considering alternative models from other manufacturers.