E910.52 Datasheet, PDF (1/1 Pages) ELMOS Semiconductor AG – Contact monitor to GND or VBAT (16 channel, serial interface)

BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
ÿ Contact monitor to GND or VBAT (16 channel, serial interface)
FEATURES
ÿ Supply range VDD 3.8V to 6V
ÿ Supply range VS 5.5V to 18V
ÿ Maximum over voltage protection up to 45V
ÿ Low standby current (typical < 100µA)
ÿ Parallel to serial interface
ÿ High noise immunity
ÿ Contact status monitoring by comparison to
internal reference
ÿ Interrupt request generated on debounced
pin change
ÿ Filtering of all inputs
ÿ – 40°C to + 105°C operating temperature
ÿ SO28w package
APPLICATION
ÿ Automotive electronics
ÿ Monitor for mechanical switches
ÿ Monitor for voltage levels
DESCRIPTION
The IC is intended to reduce the costs of products with a large
number of inputs and also to reduce software overhead by gen-
erating an interrupt on pin change. To decrease the system power
dissipation the external driver transistors are only active for 20µs
of a 7ms frame corresponding to 140 Hz polling frequency.
All inputs compare with the internal reference, will be debounced
and can be monitored by the SPI. Additionally the inputs IN15 and
IN14 are available on their outputs D15 and D14 directly without
debouncing.
DRIVER IC
PINNING
Pin Name
1
DATA0
2
DATA1
3
DATA2
4-11 IN0-7
12
GND
13
TEST
14 VS
15
TB1
16 TB2
17
IRQ
18-25 IN15-8
26 CS
27 CK
28 VDD
I/O IC
Analog multiplexer 8:1
Contact monitor 8 * to GND, par. out
Contact monitor 8 * to VBAT, par. out
Contact monitor 2 * 4, adj., par. out
Contact monitor 2 * 4, par. out
Non volatile contact monitor
ÿ Contact monitor 16 *, ser. out
SENSOR IC
SENSOR INTERFACE IC
E910.52
Description
Tristate output – serial transmission of
the inputs IN0-15 in normal mode
Logic level output of the input IN14
Logic level output of the input IN15
Input 0-7
Ground
Test, connect to ground
Analog supply voltage
Control signal of the external PNP transistor (T1)
Control signal of the external NPN transistor (T2)
Informs the µC about a change of the input state
(open drain)
Input 15-8
Modus signal CS=0 : “stand-by”
mode, CS=1: normal mode
Clock used for the parallel load and
serial transmission of the inputs
Logic supply voltage
PACKAGE
DATA0
1
DATA1
2
DATA2
3
IN0
4
IN1
5
IN2
6
IN3
7
IN4
8
IN5
9
IN6
10
IN7
11
GND
12
TEST
13
VS
14
28
VDD
27
CK
26
CS
25
IN8
24
IN9
23
IN10
22
IN11
21
IN12
20
IN13
19
IN14
18
IN15
17
IRQ
16
TB2
15
TB1
BLOCK DIAGRAM
VBAT
76
VS
VS
VDD
VDD
TB1
CH15
IN0
VS
CH0
+
Ref. _{_}
D15
D14
µC
Ctrl
IRQ
(debounce,
wakeup, IRQ)
IN15
D0
CLK
SPI
TB2
CS
Note ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any
circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication
has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of
the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications.
Copyright © 2005 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.
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elmos product catalog june 2005
77