Capacitor Touch Chip GTX314L With I2C Interface, Strong Anti -Interference, And 14 Channel Touch Buttons GTX314L

South Korea's GreenChip's capacitive touch chip GTX314L belongs to the 14 -bit touch sensor series, with multi -channel trigger sensors.It achieves interrupt function and wake -up function by continuous mode, can be widely used in various types of control panels, and can directly reach the processing signal of the original mechanical touch button.

The GTX314L chip adopts a special integrated circuit inside the GTX314L chip. The power supply voltage suppression ratio is high, which can reduce the number of button detection errors. Even in a unfavorable environment, it can ensure high reliability.Through high -voltage testing and injection current testing, the effect is significant.In addition, the chip integrates rich simulation and digital peripherals, which provides interrupt functions, slide patterns and registers to write locking functions, built -in digital noise filters, with intelligent sensitivity calibration functions, and it is easy to form various flexible door lock solutions.

The chip can automatically find a card, automatically shield the touch chip function before the probe card. There is no MCU intervention in the whole process. The MCU only needs to determine IRQ and perform the corresponding operation.This new implementation method reduces the overall standby power consumption of the smart door lock to less than 10UA, redefining low power consumption.

GTX314L can be used within a wide power supply voltage range of 1.8V to 5.5V.Its CTRL pin provides a switchable chip ID, which can implement parallel operations of two chips on the same I2C bus.Internal control registers can be read and write through the I2C interface.

GTX314L also has internal power reset and external reset function.The internal reset is used for initial start -up reset, and the external reset is completed by the NRST pin.The low -pulse signal of the NRST pin is used for sudden resetting, which is suitable for dense reset of the system.If you do not use external reset, the NRST pin can be suspended without external reset components.

When the VDD reaches the VDD_RST level, the internal VDlay voltage rises.The internal reset pulse remains low between T1 and T2. During this low pulse period, the internal power reset operation is completed.Whenever VDD drops down in the internal reset of the VDD_RST, the VDELAY signal becomes lower, and then the internal reset pulse also drops to a low level.Through the above -mentioned internal reset operation sequence, GTX314L has obtained a clearer and more accurate power reset function than other functions.

During the low input pulse, the external reset is activated through the NRST pin.Enter the low pulse input NRST pins to easily achieve dense system reset.Correct reset requires a low -pulse cycle of more than 10 microseconds.Since the NRST pin has a internal pull resistor (a typical value of 30kΩ), the NRST pin can be suspended.

The characteristic of the capacitive touch chip GTX314L:

Power supply voltage range: 1.8V to 5.5V

14 channel CAP. Sensor input

Embedded GreenTouch3TM engine

Intelligent sensitivity calibration; low power enhancer

Provide interrupt functions; provide slide pattern;

Support I2C interface; provide the register to write the lock function

Encapsulate

The peripheral circuit is simple and easy to debug; you can adjust the sensitivity of each button separately by programming, pass the lead-free authentication, and encapsulate it (QFN-24L (4.00 x4.00x0.75, E = 0.50)).Digital noise filter, the CTRL pin of GTX314L provides a chip ID and I2C bus that can switch on the same chip and perform two chips in parallel operations.