|
|
PDF BS808C Data sheet ( Hoja de datos )
| Número de pieza | BS808C | |
| Descripción | (BS801C - BS808C) Touch Key | |
| Fabricantes | Holtek Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de BS808C (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
|
No Preview Available !
BS801C/02C/04C/06C/08C
Touch Key
Features
· Operating voltage: 2.2V~5.5V
· Ultra low current: 3.0mA at 3V
· Auto-calibration
· High reliability touch detections
· High PSRR
· Output type: Level-hold or Toggle
· One-key or Any-key State
· Key State Mode set by pins or serial command
· Open drain NMOS output
· Key status monitored using pins or serial bus
General Description
The BS801C/02C/04C/06C/08C are a range of 1 to 8
key touch key devices which can detect human body
contact using external touch pads. The high level of de-
vice integration enable applications to be implemented
with a minimum number of external components.
The BS804C and BS808C are equipped with a One-line
serial interface to allow easy communication with an exter-
nal MCU for device setup and for touch pin monitoring pur-
poses.
Special internal circuitry is also employed to ensure
excellent power noise rejection to reduce the possibility
of false detections, increasing the touch switch applica-
tion reliability under adverse environmental conditions.
With auto-calibration, low operating current and a low
power one-key operating state, this range of touch key
devices provides a simple and effective means of imple-
menting touch switches in a wide variety of applications.
Selection Table
Part. No.
Touch
Keys
BS801C 1-Key
BS802C 2-Key
BS804C
www.DataSheet4U.com
BS806C
4-Key
6-Key
BS808C 8-Key
Operating Current at 3V
One-Key
State
Any-key
State
3.0mA
¾
¾ 5.0mA
3.0mA
3.0mA
3.0mA
8.0mA
14.0mA
18.0mA
Key
Output
Type
Package
Level-Hold
or Toggle
Level-Hold
or Toggle
¾
Level-Hold
or Toggle
Level-Hold
SOT23-6
8SOP
8SOP
16NSOP
16NSOP
¾ 16NSOP
Level-Hold 20SOP/SSOP
Serial
Interface
¾
¾
Ö
¾
Ö
¾
Auto
Calibration
Ö
Rev. 1.00
1 December 2, 2009
1 page  
A.C. Characteristics
Symbol
Parameter
fSCD
SCD Clock
fKRT Key Response Time
tKH Maximum Key Hold Time
tCAL Auto-Calibration Period
BS801C/02C/04C/06C/08C
Test Conditions
VDD Conditions
3V ¾
3V ¾
3V ¾
3V ¾
Ta=25°C
Min.
10.4
75
30
1.8
Typ.
13.0
100
40
2.5
Max.
15.6
125
50
3.2
Unit
kHz
ms
s
s
Functional Description
Introduction
This range of BS80xC touch key devices offer an easy
and reliable means of implementing touch switch func-
tions in a range of applications. A single external capaci-
tor is the only external component required for most
applications while a single line serial bus offers conve-
nient communication with an external MCU.
Device Operation State
There are two operating states known as the One-key
State and the Any-key State. Devices with an OKW pin,
namely the BS804C, BS806C and BS808C, can oper-
ate in either the One-key State or the Any-key State.
When these devices are powered up, the condition of
the OKW pin will be automatically read. If the OKW pin is
low then the device will enter the Any-key State and if
the pin is floating the device will enter the One-key
State. As the BS801C and BS802C devices do not have
an OKW pin they will always operate in the Any-key
State.
In the Any-key State, as the name suggests all of the
Keyn touch inputs will be active, however in the One-key
State only Key0 will be active. After power up if the
www.DataSheet4UB.Sco8m04C, BS806C and BS808C device enters the
One-key State then touching any Key other than Key0
will have no effect. If a touch action is however detected
on Key0, then the device will enter the Any-key State
and operate normally with all keys active. However,
within a timer period of around 20 seconds, if no touch
actions are detected on any Key input, then the device
will revert to the One-key State.
The advantage of choosing the One-key State over the
Any-key State is that it will result in lower power con-
sumption as only one key remains active. The logic sta-
tus of the OKW pin is only read when the device powers
up and will determine the operating state of the device
after power-on. For the BS804C and BS808C devices,
this power-on state can be overridden later by sending
the appropriate command to the device on its SCD pin.
The logic level on the OKW pin must not be changed af-
ter power on. Internal circuitry ensures that the internal
pull-high resistor on the OKW pin will not consume cur-
rent after power-on.
Part No.
BS804C
BS806C
BS808C
OKW Open
One-key
State
OKW Low
Any-key
State
The logic status of the OKW pin is read when the device
powers up. The logic level on this pin must not be
changed after power on. Internal circuitry ensures that
the internal pull-high resistor on the OKW pin will not
consume current.
Part No.
BS804C
BS806C
BS808C
Any-key On Time in
One-key State
Approx 20 secs
Rev. 1.00
5 December 2, 2009
5 Page 
Package Information
8-pin SOP (150mil) Outline Dimensions
8
A
1
5
B
4
C
C'
D
EF
· MS-012
Symbol
A
B
C
C¢
D
E
F
G
H
a
www.DataSheet4U.com
Min.
228
150
12
188
¾
¾
4
16
7
0°
BS801C/02C/04C/06C/08C
G
H
a
Dimensions in mil
Nom.
¾
¾
¾
¾
¾
50
¾
¾
¾
¾
Max.
244
157
20
197
69
¾
10
50
10
8°
Rev. 1.00
11 December 2, 2009
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet BS808C.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| BS808B | (BS801B - BS808B) Touch Key | Holtek Semiconductor |
| BS808C | (BS801C - BS808C) Touch Key | Holtek Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |