Physio Control LIFEPAK 9 - Page 192

LIFEPAK 9 defibrillator/monitor
TYPE
iC
NuMBER
LOCATION
REF.
DES.
Multivibrator
A
74HC221
Main
(A1)
U31
1
16
A1
VCC
INPUTS
OUTPUTS
2
ISREXTI
|
CLEAR
A
|8
Q
0
BIS
”
CEXT
3
18
L
X
X
L
H
i
x
H
X
L
H
CLR1
一
CLR
CEXT1
x
x
上
[
H
01
4
0
0
13
01
H
L
4
SL
LI
H
1
H
Su
Ur
02
5
0
5
1252
+
Lu
İH
Γι
ar
6
CLR
11
CEXT2
一
Pt
上
CLR2
H
=
HICH
LEVEL
REXT2
7
10
82
L =
LOW
LEVEL
CEXT
一
=
1
=
TRANSITION
FROM
LOW
TO
HIGH
8
9
A2
$
=
TRANSITION
FROM
HICH
TO
LOW
GND
=
=
几
=
ONE
HIGH
LEVEL
PULSE
U
=
ONE
LOW
LEVEL
PULSE
X
=
IRRELEVANT
CONNECTION DIAGRAM
FUNCTION TABLE
Figure 6-19 Multivibrator
TYPE IC NUMBER LOCATION REF. DES.
Multivibrator À 4538 Main (Al) U26
CX RX
CND
==]
À
上
一
ww
VDD
CX1/RX1 2 = Y 72
CLEAR 13 CX2/RX2 |
Al 4 CLEAR 2 11 72
Q1—16 5- MA _
01—97 PIN CONFIGURATION B ec 本 一 7
CND 一 48 3
3 CX RX
INPUTS OUTPUTS Γ 3 一 ww VDD
CLR A Blo 0 = fis fis
L X X i L H T1 12
x H χι Η 12 A or 10
Xx x bit 개 FUNCTION TABLE 114 e
H L tin tl B 5h 9
H 4 KİN TV C
H=High Level i
L=Low Leve]
4=Transistion from Low to High RX AND CS ARE EXTERNAL COMPONENTS
t=Transition from High to Low
Jl=0ne High Level Pulse FUNCTIONAL DIAGRAM
1=0ne Low Level Pulse
X= Irrelevant
Figure 6-20 Multivibrator
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