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Application Note 9871
Demo Board Schematic
RJ-11
J15
RING
+12V 1
4
RELAY
8
6
9
16
TP1
R P1
+5V
J1
C 1
TP2
U2
C 10
C 2
C 8
J4
20
2
3
5
6
VCC
RRLY
CH
RING
GND
U1
VTX
PTG
SPM
VRX
AGND
28
1
26
25
1
2
S8
3
J8, J7
R 14
R 15
J13
J5, J6
R P2
C 7
C 4
RD
SPST
-48V
J2
-24V
J3
TIP
C 11 C 6
V BL = V BL
V BL = V BH
C 5 C 12
13
11
R 13
S9
R 12
J12
C 9
TP3 D 3
OPTIONAL
R 11
R 1
+ -
R 2 C 3
R 3
+5V
RING GENERATOR
VBAT
7
8
9
10
12
13
14
11
ZT
TIP
RSYNC_REV
VBH
ILIM
VBL
ROH
RDC_RAC
CDC
SHD
DT
GKD_LVM
DR
C1
CRT_REV_LVM
C2
C3
? SPST
CENTER OFF
4
24
23
22
21
18
19
17
16
15
?
R 6
R 5
R 4
?
R 8
R 10 SPST
20ms
R 7
10ms
S4
J10
S5 SHD
R 18 LED D1
LED ON
?
DET LOW
H
R 16
C 13
R 9
12/16kHz
PULSE METERING
INPUT SIGNAL
J9
J11
SPST
S6 GKD_LVM
R 17 LED D2
LED ON
DET LOW
L
TIP TEST OUT
2
K1
+5V
S3
S2
S1
RING TEST OUT
TIP TEST IN
RING TEST IN
3
5
7
12
14
10
P1 S7
H
P2
S10
H
P3
S11
H
P4
S12
H
758XX ACCESS SWITCH CONTROL
UniSLIC14 CONTROL
PINA
TSD
L
LATCH
L
TEST
L
TEST
+5V
LOGIC TERMINAL PORT
OUT
IN
FIGURE 7. UniSLIC14 DEMO BOARD SCHEMATIC
TABLE 8. BASIC APPLICATION CIRCUIT COMPONENT LIST
COMPONENT
U1 - SLIC
U2 - Dual Asymmetrical Transient Voltage Suppressor
RP1, RP2 (Line feed resistors)
R1 (RDC_RAC) R = 50*RFEED, RFEED = 381 ?
R2, R3 (Input Current Limiting Resistors for DT and DR)
R4 (RD resistor) R = 500/I SH, I SH = 9.78mA
R5 (ROH resistor) R = 500/Iloop(min)-I SH-
VALUE
UniSLIC14 Family
TISP1082F3
30 ?
21.0k ?
2M ?
41.2k ?
38.3k ?
TOLERANCE
N/A
N/A
Matched 1%
1%
1%
1%
1%
RATING
N/A
N/A
2.0W
1/16W
1/16W
1/16W
1/16W
(Iloop(min) = 20mA, I SH- 6.54mA)
R6 (R ILIM resistor) R = 1000/ILIM (ILIM = 30mA)
33.2k ?
1%
1/16W
9
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