ÿ Contact monitor (8 channel to VBAT, parallel interface) E910.34

Introduction
bus ic
dc/dc converter
motor driver ic
ripple counter
driver ic
I/O ic
Sensor interface ic
sensor ic
ip’s
E 910.02 Analog multiplexer 8:1
E 910.33 Contact monitor 8 * to GND
ÿ E 910.34 Contact monitor 8 * to VBAT
E 910.35 Contact monitor 2 * 4, adj., par. E 910.36 Contact monitor 2 * 4, par. out
E 910.47 Non volatile contact monitor
E 910.52 Contact monitor 16 *, ser. out
E 910.66 DC motor control with Hall int.
ÿ Contact monitor (8 channel to VBAT, parallel interface)
features
description
ÿ Supply voltage range VDD 4.25V to 5.25V
The IC monitors the status of all switch contact connected to VS
ÿ Monitor supply voltage range VS 5.25V to 25V
continuously .
ÿ Maximum overvoltage protection up to 40V
ÿ Internal clamp diodes at each input to VS and GND
The input currents are compared with the current of an internal
ÿ Low standby current (typical < 10µA)
reference resistor. The IC is designed to operate with an external
ÿ Contact status monitoring by comparison of the
series resistor RIN0 to RIN7 of 1kÝ. The current, driven through the
resistance at the inputs with an internal reference
pinning
contacts keeps their resistance low.
ÿ High noise immunity
ÿ – 40°C to + 125°C operating temperature
The output switches to high when the input resistance increases
ÿ SO20w package
to above 9kÝ and switches to low when the input resistance falls
below 1.5kÝ. These values are valid within the supply range 5.25V
application
E910.34
to 25V.
ÿ Automotive electronics
ÿ Monitor for mechanical switches
A closed switch corresponds to a low logic level on the outputs
ÿ Monitor for voltage levels
OUT0-7.
Pin
package
Name
Description
1
VS
Monitor supply voltage
2
IN0
Input for switch / voltage sensing
3
IN1
Input for switch / voltage sensing
4
IN2
Input for switch / voltage sensing
5
IN3
Input for switch / voltage sensing
6
IN4
Input for switch / voltage sensing
7
IN5
Input for switch / voltage sensing
8
IN6
Input for switch / voltage sensing
9
IN7
Input for switch / voltage sensing
10
ENB
Chip - enable active low
11
GND
Ground
12
OUT7
TTL compatible bidirectional data port
13
OUT6
TTL compatible bidirectional data port
14
OUT5
TTL compatible bidirectional data port
15
OUT4
TTL compatible bidirectional data port
16
OUT3
TTL compatible bidirectional data port
17
OUT2
TTL compatible bidirectional data port
18
OUT1
TTL compatible bidirectional data port
19
OUT0
TTL compatible bidirectional data port
20
VDD
Logic supply voltage
VS
1
20
IN0
2
19
IN1
3
18
IN2
4
17
IN3
5
16
IN4
6
15
IN5
7
14
IN6
8
13
IN7
9
12
ENB
10
11
VDD
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
GND
SO20
Block diagram
VBAT
VS
VDD
VDD
CH7
CH0
EN
IN0
IN1
IN2
OUT0
Ref.
OUT1
OUT2
IN3
OUT3
IN4
OUT4
IN5
OUT5
IN6
OUT6
IN7
E910.34
84
external
µC
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 © 2007 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.
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elmos product catalog 2007/2008
85