L6726

Manufacturer Part NumberL6726
DescriptionUNIVERSAL SPEECH CIRCUIT
ManufacturerUnisonic Technologies
L6726 datasheet
 


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L6726
FUNCTIONAL DIAGRAM
DTMF
10
input
12
13
DC
8
9
7
DC output for external
CMOS device
Mute
5
(active low)
R
=0~4KΩ
L
0 Ω when artificail line is used
R
Load
=400Ω+400Ω
+
E=48.5V
C1= 1μF when artificial line is used
470μF when not used
www.DataSheet4U.com
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
1
UTC L6726
AD
AT
AM
5
11
3
2
2
4
1.Impedance to line and radio interference suppression.
2.Transmit gain and frequency response network.
3.Receive gain and frequency response network.
4.Side tone balance network.
5.DC-supply components.
5H+5H
I
L
ARTIFICAIAL
+LINE
+
LINE
C1
DTMF
1μF
600Ω
I
V
L
V2
DC
V1
V
DC
Figure 1. Test setup without rectifier bridge
LINEAR INTEGRATED CIRCUIT
17
AR
18
15
16 6
14
4
3
1
MUTE
V
M
Z
=350 Ω
MIC
MIC
V3
UTC 6726
with external
component
see fig 3
Z
=350 Ω
Rec
REC
V4
-LINE
Telephone
Line
4 of 13
QW-R108-015,B