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  Holtek Semiconductor Electronic Components Datasheet  

BS814A-2 Datasheet

Touch Key

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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.
BS812A-1
BS813A-1
BS814A-1
BS814A-2
BS816A-1
BS818A-2
BS8112A-3
BS8116A-3
Touch
Key
2-Key
3-Key
4-Key
4-Key
Option
×
×
×
×
6-Key OMS/LSC(Note 1)
8-Key OMS/LSC(Note 1)
12-Key
Note 2
16-Key
Note 2
Istb@3V
2.0μA
4.5μA
5.0μA
5.0μA
12μA/6μA
12μA/6μA
13μA/3μA
17μA/3.5μA
Parallel Outputs
Serial
Interface
Power Mode
Auto
Calibration
Package
NMOS
(internal pull-high)
×
×
×
SOT23-6
8SOP
10MSOP
×
8SOP
NMOS
(internal pull-high)/
CMOS-Direct
×
Normal and
Standby
16NSOP
Binary
16NSOP
× I2C
16NSOP
× I2C
20SOP/SSOP
Note: 1. Refer to the OMS/LSC Option table.
2. Refer to the I2C Option table.
Rev. 1.32
1 January 19, 2016


  Holtek Semiconductor Electronic Components Datasheet  

BS814A-2 Datasheet

Touch Key

No Preview Available !

Pin Assignment
BS812A-1/BS813A-1/BS814A-1/BS814A-2
BS816A-1/BS818A-2/BS8112A-3/BS8116A-3
SOT23-6
6
54
12A-1 Top View
1 23
VDD
Key1
Key2
Key3
Key4
1 10
29
38
47
56
BS814A-1
10MSOP-A
VSS
Kout1
Kout2
Kout3
Kout4
Key1
Key2
Key3
Key4
Key5
Key6
OMS
LSC
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
BS816A-1
16 NSOP-A
Kout1
Kout2
Kout3
Kout4
Kout5
Kout6
VDD
VSS
Key3
Key4
Key5
Key6
Key7
Key8
Key9
Key10
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
BS8112A-3
16 NSOP-A
Key2
Key1
SDA
SCL
VDD
VSS
Key12/IRQ
Key11
Key1
Key2
Key3
Kout3
18
27
36
45
BS813A-1
8SOP-A
VDD
VSS
Kout1
Kout2
Key1
Key2
Key3
Key4
18
27
36
45
BS814A-2
8SOP-A
VDD
VSS
Data
Clock
Key1
Key2
Key3
Key4
Key5
Key6
Key7
Key8
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
BS818A-2
16 NSOP-A
BIN3/Data
BIN2/Clcok
BIN1
BIN0
OMS
LSC
VDD
VSS
Key3
Key4
Key5
Key6
Key7
Key8
Key9
Key10
Key11
Key12
1
2
3
4
5
6
7
8
9
10
20 Key2
19 Key1
18 SDA
17 SCL
16 VDD
15 VSS
14 Key16/IRQ
13 Key15
12 Key14
11 Key13
BS8116A-3
20 SOP-A/SSOP-A
Rev. 1.32
2 January 19, 2016


Part Number BS814A-2
Description Touch Key
Maker Holtek Semiconductor
Total Page 27 Pages
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