n Overview
The AN6152 is an integrated circuit designed for telephone
speech network. It has the basic function which is necessary to
apply a sound signal onto the line and excellent in branch per-
formance.
n Features
• Wide operating voltage range : 3 to 11.5V
• Built-in amplifiers for “Dial Tone” and “DTMF”
• Amplifier
• Each amplifier gain automaticaly changeable depending on
line current.
• Various types of microphone and receiver are available.
AN6152
Speech Network Circuit
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
19.2
–
0.3
1.22
–
0.25
3 to 15˚
Unit : mm
6.2– 0.3
0.5
–
0.1
2.54
5.2– 0.25 3.05– 0.25
7.62– 0.25
0.3
+
0.1
– 0.05
1.1– 0.25
16-pin DIP Package (DIP016-P-0300D)
SEND
Main Amp.
REC
Main Amp.
REC
Pre Amp.
KT
Pre Amp.
DTMF
Pre Amp.
MIC
Pre Amp.
Current
Source
ATT
Control
ATT
ATT
Logic VREF
16 15
VCC VL
14 13 12 11 10 9
ST AP NF MI2 MI1 DT
1
GND
2 3 4 5 6 7 8
RO1 RO2 RF RI KT DM Vr
n Block Diagram