HC5503 Intersil Corporation, HC5503 Datasheet - Page 13

• Manufacturer Part Number: HC5503
• Description: Low Cost 24V SLIC For PABX/Key Systems
• Manufacturer: Intersil Corporation

Schematic Diagram
SENSE
FEED
RING
RING
11
TIP
12
RF
TF
2
4
3
V
BAT
V
V
BAT
RING FEED
CC
R
R
R
R
R
R
R
R
R
R
R
7
8
10
9
22
16
15
3
4
1
2
I B4
I B5
A-300
AMP
TIP FEED
A-400
AMP
V
-
+
R
V
BAT
C1
CC
23
6
13
V
+
RX
-
CC
25
Q D3 Q D36
R
21
V BAT
R
17
V B2
R
11
V B2
V BAT/2 REFERENCE
-
+
+
-
C2
26
R
12
A-200
LONG’L
I / V AMP
A-100
TRANSV’L
I/V AMP
I B1 I B2 I B3 I B4 I B5 I B6 I B7 I B8
FIGURE 8. FUNCTIONAL SCHEMATIC
I B6
R
5
I B7
V
PLCC PIN NUMBERS SHOWN
13
BAT
V
V
BAT
R
R
CC
V
13
R
14
CC
V
V
6
BAT
BAT
VOLTAGE AND CURRENT
GND
BAT
14
HC5503
R
BIAS NETWORK
20
R
R
18
19
GND
TX
ANA
28
27
V
Q D27
+
LOAD CURRENT
LIMITING
RING TRIP DETECTOR
+
CC
SWITCH HOOK
DETECTOR
V
GND
V
CC
DIG
BAT
7
V
I B8
I B6
BAT
I B9 I B10 I B11
I B2
V
BAT
V
CC
5
Q D28
V B4
-
5V
-
+
V B5
V B1
V B5
V B1
V B2
V B3
V B4
V B5
5V
-
THERMAL
GND SHORTS
LIMITING
CURRENT
LIMITING
V BAT
I B1
V B3
+
RS
5V I B10
9
AND LOGIC
INTERFACE
GK
SH
RFC
V BAT
STTL
V
CC
RD
10
SHD
NC
RC
PD
17
16
19
18