– 49 –
2
1
RLO1
TLO1
TLI1
RLI1
CPR
GND
RXO
RXI
RLI2
RLO2
TLO2
TLI2
CPT
VB
FI
4
VCC
3
CD
FO
+
–
+
–
5
9
8
7
6
HTI
TXO
TXI
HTO+
HTO
–
10
12
11
14
13
27
28
25
26
24
20
21
22
23
19
17
18
15
16
MUT
MCO
MCI
CT
VLC
VR
VCC
HYBRID
AMP 2
HYBRID
AMP 1
MIC
AMP
VREF
+
–
VR
FILTER
AMP
COMPARATOR
AGC
BACKGROUND
NOISE
DETECTOR
VR
LEVEL
DETECTOR
LEVEL
DETECTOR
COMPARATOR
ATTENUATOR
CONTROL BLOCK
BACKGROUND
NOISE
DETECTOR
DIAL
TONE
DETECTOR
LEVEL
DETECTOR
LEVEL
DETECTOR
RX
ATTEN-
UATOR
TX
ATTENUATOR
U1019
U4082B
OVER CURRENT/
OVER TEMP
PROTECTION
3
2
5
4
REGULATOR
REFERENCE
VOLTAGE
1
ON/OFF
GND
VIN
VOUT
N/C
– HAND MAIN Board –
U1007
LP29811M5-3.0
Summary of Contents for SPP-IM977
Page 26: ...SPP IM977 ...
Page 36: ......