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BS814A-2

Holtek Semiconductor
Part Number BS814A-2
Manufacturer Holtek Semiconductor
Description Touch Key
Published May 11, 2018
Detailed Description BS812A-1/BS813A-1/BS814A-1/BS814A-2 BS816A-1/BS818A-2/BS8112A-3/BS8116A-3 Touch Key Features • Operating voltage: 2.2V...
Datasheet PDF File BS814A-2 PDF File

BS814A-2
BS814A-2

Overview
BS812A-1/BS813A-1/BS814A-1/BS814A-2 BS816A-1/BS818A-2/BS8112A-3/BS8116A-3 Touch Key Features • Operating voltage: 2.
2V~5.
5V • Low standby current • Auto-calibration • Reliable touch detections • Standby and normal operating modes • Maximum key on duration time detection • Adaptive voltage drop function • Level Hold, selectable active level- low or high • NMOS output with internal pull-high/CMOS- Direct Output • Both serial interface and parallel outputs • Sensitivity adjustment using an external capacitor • Minimal number of external components General Description The BS81x is a series of 2~16 key touch key devices which can detect human body contact using external touch pads.
The high level of device integration enable applications to be implemented with a minimum number of external components.
The BS81x series devices are equipped with serial or parallel interfaces to allow easy communication with an external MCU for device setup and for touch pin monitoring purposes.
Special internal circuitry is also employed to ensure excellent power noise rejection to reduce the possibility of false detections, increasing the touch switch application reliability under adverse environmental conditions.
With auto-calibration, low standby current, excellent resistance to voltage fluctuation and other features, this range of touch key devices provide a simple and effective means of implementing touch key operation in a wide variety of applications.
Selection Table For this device series, most of the feature are similar.
The BS8112A-3 and BS8116A-3 provide I2C function.
The BS814A-2 and BS818A-2 include a serial interface function while the BS812A-1, BS813A-1, BS814A-1 and BS816A-1 have parallel outputs.
Meanwhile the BS8112A-3 and BS8116A-3 can set up some options and the sensitivity through the I2C communication interface and the BS816A-1 and BS818A-2 include two hardware options.
The following table summarizes the main characteristics of each device.
Part.
No.
BS...


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