EM6420V1WP10E

Overview

The EM6420V1WP10E 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 such as scan frequency and sensitivity configurable via host microcontroller or configuration inputs. The device operates within a supply voltage range of 1.2 V to 2.0 V or 2.2 V to 3.6 V. Power consumption is specified at 8.0 µA @ 3.0 V (14.5 µA @ 1.5 V) in Low Power Mode and 2.0 µA @ 3.0 V (5.0 µA @ 1.5 V) in Ultra Low Power Mode for 16 sensors scanned at 8 Hz. Nominal sensor capacitance ranges from 3 to 31 pF, with scan frequencies adjustable from 1 Hz to 128 Hz.

Feature Summary

• Supports up to 16 analogue sensor inputs per device, scalable via parallel connection
• Offers user-selectable communication interfaces including 4-wire SPI, I2C, 4-bit parallel, and 8-bit direct output
• Features configurable active edge IRQ output signals and an active high enable input
• Requires no software development or tuning for basic operation

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type, temperature range, and RoHS compliance status. Ensure the selected supply voltage range matches the application requirements, as this determines the necessary external decoupling capacitor configuration. Confirm availability of development tools if initial integration support is required.

Selection Notes

Select the appropriate supply voltage range based on system power constraints; the low range requires a voltage multiplier while the high range uses internal regulators. Consider the number of sensors required, as multiple devices can be used in parallel for configurations exceeding 16 inputs. Evaluate the communication interface compatibility with the host microcontroller to ensure seamless integration without additional level shifting or protocol conversion hardware.

Part Context

The EM6420 series is designed as an ultra low power ASIC for capacitive touch screen interfaces. It integrates a CoolRISC core, RAM, ROM, and various timers to manage sensor scanning and interrupt generation. The device is available in naked die form or SMT packages such as MLF32-36-40, catering to space-constrained applications requiring high integration and minimal external components.

Replacement Considerations

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