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PBL385411SO Datasheet(PDF) 4 Page - Ericsson |
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PBL385411SO Datasheet(HTML) 4 Page - Ericsson |
4 / 14 page 4 PBL 385 41 Figure 5. Pin configuration. 18-pin DIP 20-pin SO Pin Descriptions Refer to figure 5. DIP SO Name Function 1 1 +L Output of the DC-regulator and transmitter amplifier, connected to the line through a polarity guard diode bridge. 2 2 TO Output of the transmitter amplifier, connected through a resistor of 47 to 100 ohm to -L, 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 3 TI Input of the transmitter amplifier. Input impedance 17 kohm ± 20 %. 4 4 +C Positive power supply terminal for most of the circuitry inside the PBL 385 41 (about 1 mA current consumption). The +C pin must be connected to a decoupling capacitor of 47 µF to 150 µF. 5 5 Mute When low, speech circuit is muted and the DTMF input is enabled. Maximum voltage (at mute) is 0.3 V, current sink requirement of external driver is 50 µA. 6 6 GR Control input for the gain regulation function. 7 7 DCS 1 Control input to the DC1-supply. A resistor to -line sets the maximum current load of the supply. 8 8 DCO 2 Output of the DC2-supply. 9 9 DCO 1 Output of the DC1-supply. 10 12 DI Input for the DTMF-signal. Input impedance 25 kohm ± 20 %. 11 13 MO Output of the microphone amplifier or DTMF-amplifier. 12 14 MI 1 Inputs to the microphone amplifier. Input impedance 1.7 kohm ± 20 %. 13 15 MI 2 14 16 -L The negative power terminal, connected to the line through a polarity guard diode bridge. 15 17 RI Input of receiver amplifier. Input impedance 38 kohm ± 20 %. 16 18 DR Control input for the receiver amplifier driving capability. 17 19 RE 1 Receiver amplifier outputs. Output impedance is approximately 3 ohm. 18 20 RE 2 10 Not connected 11 Not connected +L TO TI +C Mute GR DCS1 DCO2 DR RI -L MI 2 MI 1 MO 1 2 3 4 5 6 7 8 16 15 14 13 12 11 DCO1 DI 9 10 RE 2 RE 1 18 17 1 2 3 4 5 6 7 8 19 18 17 16 15 14 13 +L TO TI +C Mute GR DCS1 DCO2 RE 2 RE 1 DR RI -L MI 2 MI 1 MO 9 12 10 11 DCO1 NC DI NC 4 5 17 16 20 } } |
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