PBL38571 查看數據表（PDF） - Ericsson

零件编号

产品描述 (功能)

比赛名单

PBL38571

High current Speech and Line interface Circuit

Ericsson  

PBL 385 71

+L 1

TO 2

TI 3

-L 4

-L 5

+C 6

Mute 7

GR 8

16 RE 2

15 RE 1

14 RI

13 -L

12 -L

11 M2

10 M1

9 MO

16-pin BW DIP

Figure 5. Pin configurations.

+L 1

TO 2

TI 3

-L 4

-L 5

+C 6

Mute 7

GR 8

16 RE2

15 RE1

14 RI

13 -L

12 -L

11 MI

10 MI

9 MO

16-pin BW SO

Pin Descriptions

Refer to figure 5.

Pin Name

1 +L

Function

Output of the transmitter amplifier. Connected to the line through a polarity guard diode bridge.

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. impedance and the signal is used

to drive a side tone balancing network.

3 TI

Input of transmitter amplifier. Input impedance 17 kohm ± 20 %.

} 4,12

-L

5,13

Negative power terminal, connected to the line through a polarity guard diode bridge.

6 +C

7 Mute

8 GR

9 MO

} 10 MI 1

11 MI 2

14 RI

} 15 RE 1

16 RE 2

Positive power supply terminal for most of the circuitry inside the PBL 385 71 (about 1 mA current

consumption). The +C pin should be connected to a decoupling capacitor of 47 µF to 150 µF.

Mute input. Maximum voltage (to mute) is 0.3 V, current sink requirement of external driver is 100 µA.

Input for the gain regulation control circuitry.

Output of the microphone amplifier.

Inputs of the microphone amplifier. Input impedance 1.7 kohm ± 20%.

Input of receiver amplifier. Input impedance is 38 kohm ± 20 %.

Receiver amplifier outputs. Output impedance approximately 3 ohms.

4

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