L6726 Unisonic Technologies, L6726 Datasheet - Page 2

• Manufacturer Part Number: L6726
• Description: UNIVERSAL SPEECH CIRCUIT
• Manufacturer: Unisonic Technologies

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L6726
Pin
No.
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
PIN CONFIGURATION
PIN DESCRIPTIONS
Name
Mute
DCO
RE 1
RE 2
DCS
DCC
MI 1
MI 2
MO
Pin
GR
DR
TO
+C
+L
DI
RI
TI
-L
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
Control input for the gain regulation circuitry.
Output of the microphone amplifier or DTMF-amplifier
Output of the DC-regulator and transmit amplifier. This pin is connected to the line through a polarity
guard and diode bridge.
Output of the transmit amplifier. This pin is connected through a resistor of 47 to 100Ω to -L, which
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.
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
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
0.3V,current sink requirement of external driver is 50µA
The sense input to the DC-supply.
The output from the DC-supply.
The control output from the DC-supply
The input for the DTMF-signal. Input impedance is 25kΩ±20%
Input to the microphone amplifier. Input impedance 1.7kΩ±20%
The negative power terminal, connected to the line though a polarity guard diode bridge
Input of receiver amplifier. Input impedance is approximately 38kΩ±20%
The control input for the receiver amplifier driving capability.
Receiver amplifier outputs. Output impedance is approximately 3Ω.
DCO
Mute
DCC
DCS
TO
GR
+C
+L
TI
2
7
9
1
3
4
5
6
8
Description
LINEAR INTEGRATED CIRCUIT
18
17
16
15
14
13
12
10
11
RE 2
RE 1
MI 2
MI 1
DR
DI
RI
-L
MO
QW-R108-015,B
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