L6726

Manufacturer Part NumberL6726
DescriptionUNIVERSAL SPEECH CIRCUIT
ManufacturerUnisonic Technologies
L6726 datasheet
 


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L6726
PIN CONFIGURATION
PIN DESCRIPTIONS
Pin
Pin
No.
Name
Output of the DC-regulator and transmit amplifier. This pin is connected to the line through a polarity
1
+L
guard and diode bridge.
Output of the transmit amplifier. This pin is connected through a resistor of 47 to 100Ω to -L, which
2
TO
sets the DC-resistance of the circuit. The output has a low AC output impedance and the signal is
used to drive a side tone balancing network.
3
TI
Input of transmit amplifier. Input impedance 17kΩ±20%
The positive power supply terminal for most of the circuitry inside the UTC L6726 (about 1mA current
4
+C
consumption).The +C-PIN shall be connected to a decoupling capacitor of 47µF to 150µF
When low, speech circuit is muted and the DTMF input is enabled. Maximum voltage (at mute) is
5
Mute
0.3V,current sink requirement of external driver is 50µA
6
GR
Control input for the gain regulation circuitry.
7
DCS
The sense input to the DC-supply.
8
DCO
The output from the DC-supply.
9
DCC
The control output from the DC-supply
10
DI
The input for the DTMF-signal. Input impedance is 25kΩ±20%
11
MO
Output of the microphone amplifier or DTMF-amplifier
12
MI 1
Input to the microphone amplifier. Input impedance 1.7kΩ±20%
13
MI 2
14
-L
The negative power terminal, connected to the line though a polarity guard diode bridge
15
RI
Input of receiver amplifier. Input impedance is approximately 38kΩ±20%
16
DR
The control input for the receiver amplifier driving capability.
17
RE 1
Receiver amplifier outputs. Output impedance is approximately 3Ω.
18
RE 2
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UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
+L
1
2
TO
3
TI
4
+C
Mute
5
GR
6
DCS
7
8
DCO
9
DCC
Description
LINEAR INTEGRATED CIRCUIT
18
RE 2
17
RE 1
16
DR
15
RI
-L
14
MI 2
13
MI 1
12
11
MO
10
DI
QW-R108-015,B
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