Baza Porad Serwisowych
LC73711N
1
RAM
R1
VDD VSS
21
16x4x30
DP
15 16
2 DP
R2
logic
20
MUTE1
3
Mute1
R3
logic
22
4
K-tone
R4
KTONE
logic
Key
5
17
R5
SP-control
inter- Control logic SPCTL
logic
19
face
26
MUTE2
C1
logic
Mute2
logic
27
C2
DTMF
18
logic
DTMF
28
C3
23
HOOK cont-
HOOKCTL
rol logic
29
C4
24
Input logic
Hold-out
HOLDOUT
logic
30
C5
11
6 7 8 9 10 12 25
13 14
XIN XOUT
Typowa aplikacja układu LC73711N
1 2 3 M5
F
ON
4 5 M M6
6
Hook switch
7 8 9 R/P
OFF
SP key
0 # M8
CLR
*
Hold
A1 A2 A3 M9
ON/OFF
R1 C5
1 30
R2 C4
2 29
Store key
R3 C3
3 28
Branch detector
R4 C2
4 27
R5 C1
5 26
STOREIN DISCONIN
6 25
Hook switch
HOLDOFFIN
HOLDOUT
7 24
ON
ONHOOKDIALIN
HOOKCTL
8 23 Speech
OFF
OFFHOOK KTONE
circuit
9 22
DPR DP
and
10 21
P/T MUTE1 speaker
11 20
ampli-
BMR MUTE2
12 19
3.58MHz
fier
XIN DTMF
13 18
XOUT SPCTL
14 17
VDD VSS
15 16
SERWIS ELEKTRONIKI
P/T
DPR
BMR
STOREIN
OFFHOOK
DISCONIN
HOLDOFFIN
ONHOOKDIALIN
LC73711N