Korea GreenChip Capacitive Touch Chip - GT304L

Capacitive Touch Chip- GT304L is part of the GreenTouch3TM^TMOne of the series capacitive touch sensors. In particular, GT304L can perform capacitive sensing with 4 channels or more using the GreenTouch3^TMEngine running. Thanks to this epoch-making GreenTouch3^TMengine, the application will be more robust and have no issues with EMC, EMI, H/W variations, voltage disturbances, temperature drift, or humidity drift. In particular, it has no problems against CS and EFT noise environments that occur in any touch application.

GT304L provides 4 LED drivers and a 32-step dimming controller. OUT[1:4] can be used for PWM output LED dimming control. This is a very economical solution when LED feedback is needed, as there is no additional material cost for LED control. For touch output results, I2C or 1-to-1 direct output interfaces can be used. The I2C interface may be useful when MCU IO or connector resources in the application are insufficient.GT304LIt can operate over a wide supply voltage range of 2.5V ~ 5.0V. It features a CTRL/A0 pin, which allows selection of sensitivity options and the I2C bus slave address by connecting the pin to VDD and GND.

I. Features of capacitive touch chip GT304L:

4-channel maximum, sensing input

With the embedded GreenTouch3^TMEngine

- Analog compensation circuit

- Embedded digital noise filter

- Smart sensitivity calibration

- Embedded CS, EFT enhanced core

Two types of interfaces supported

- 1:1 direct output mode

- I2C interface mode

Interrupt function provided

LED driver (32-step dimming control)

Sensitivity control via pin connection

Ultra-low power consumption

- Normal standby: 145 uA (@3.3V)

- Normal standby: 160 uA (@5.0V)

Wide supply voltage range: 2.5V ~ 5.0V single-supply operation

Package type

- SOP14L

- QFN16L

Passed lead-free certification

II.Applications of capacitive touch chip GT304L:

Multi-key applications - door locks, remote controls, etc.

Portable electronic products - mobile phones, MP3, PMP, PDA, navigation, digital cameras, camcorders, etc.

Multimedia devices - TVs, DVD players, Blu-ray players, digital photo frames, home theater systems, etc.

Home appliances - refrigerators, air purifiers, air conditioners, washing machines, microwave ovens, etc.

PCs, office automation, etc. - PCs, LCD monitors, fax machines, copiers, lighting controls, toys, gaming devicesetc.