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參數(shù)資料
| 型號： | E910.47 |
| 廠商： | ELMOS SEMICONDUCTOR AG |
| 英文描述： | Non volatile contact monitor |
| 中文描述： | 非接觸監(jiān)測揮發(fā) |
| 文件頁數(shù)： | 1/1頁 |
| 文件大?。?/td> | 82K |
| 代理商： | E910.47 |
BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
74
BLOCK DIAGRAM
Non volatile contact monitor
FEATURES
Supply voltage range VS
6
.
9
V to
19
V
On chip voltage clamping
Under voltage reset
Charge pump to generate programming voltage
Redundant non - volatile memory
Periodical check of data consistency
Automatic data correction in case of inconsistency
Two I/Os to detect switch activation and
drive LEDs
–
40
°C to +
85
°C operating temperature
SO
8
n package
APPLICATION
Status IC for switches
DESCRIPTION
The IC is designed for use in electric power window systems to
store and display the status of a childproof lock function of the
rear windows. The actual status is stored in three bits of the
EEPROM whenever switch activity is detected. The redundant in-
formation is checked periodically by a two out of three selection
and in case of one bit distinguishes from the others, the dominant
information is stored in all three EEPROM cells again.
To make sure that programming the memory is successful under
all supply voltage conditions, the energy is taken from an external
capacitor once the programming cycle has started. The capacitor
is charged by an internal voltage regulator. Switch detection and
the start of the programming cycle are disabled by an undervolt-
age detection, while a programming cycle once started will al-
ways be completed.
Two I/O Pins are used for detecting switch activation as well as
driving the LEDs to display the status. An open drain low-side
driver output “KISI” is active when the rear window operation is
released.
Detection of a short to ground, an open load or an overload condi-
tion on KISI will be indicated by flashing the red LED with
2
Hz.
VBAT
VS
VDD
GREEN
RED
L0
L1
KISI
control
Status E2
int. Supply
current
Limitation
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