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BS8112A-3

Description
Taiwan Hetai original BS8112A-3 16NSOP 12-key capacitive touch button chip IC
CategoryAnalog mixed-signal IC    The signal circuit   
File Size531KB,27 Pages
ManufacturerHoltek
Websitehttp://www.holtek.com/
Download Datasheet Parametric View All

BS8112A-3 Overview

Taiwan Hetai original BS8112A-3 16NSOP 12-key capacitive touch button chip IC

BS8112A-3 Parametric

Parameter NameAttribute value
MakerHoltek
package instruction,
Reach Compliance Codecompliant
Analog Integrated Circuits - Other TypesANALOG CIRCUIT
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 I
2
C 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 I
2
C 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
6-Key
8-Key
12-Key
16-Key
Option
×
×
×
×
OMS/LSC
(Note 1)
OMS/LSC
(Note 1)
Note 2
Note 2
Istb@3V
2.0μA
4.5μA
5.0μA
5.0μA
12μA/6μA
12μA/6μA
13μA/3μA
17μA/3.5μA
Parallel Outputs
NMOS
(internal pull-high)
×
NMOS
(internal pull-high)/
CMOS-Direct
Binary
×
×
Serial
Auto
Power Mode
Interface
Calibration
×
×
×
×
I
2
C
I
2
C
Normal and
Standby
Package
SOT23-6
8SOP
10MSOP
8SOP
16NSOP
16NSOP
16NSOP
20SOP/SSOP
Note: 1. Refer to the OMS/LSC Option table.
2. Refer to the I
2
C Option table.
Rev. 1.31
1
September 30, 2015
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