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L6726L-S18-T Datasheet(PDF) 2 Page - Unisonic Technologies |
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L6726L-S18-T Datasheet(HTML) 2 Page - Unisonic Technologies |
2 / 13 page L6726 LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 2 of 13 www.unisonic.com.tw QW-R108-015, C PIN CONFIGURATION PIN DESCRIPTIONS Pin No. Pin Name Description 1 +L Output of the DC-regulator and transmit amplifier. This pin is connected to the line through a polarity guard and diode bridge. 2 TO 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. 3 TI Input of transmit amplifier. Input impedance 17kΩ±20% 4 +C 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 5 Mute 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 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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