GL6965 Просмотр технического описания (PDF) - Hyundai Micro Electronics

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GL6965

Telephone Speech Network with Dialer Interface

Hyundai Micro Electronics 

GL6965

Pin No.

9

10

11

12

13

14

15

16

17

18

19

20

Symbo

l

MUTE

GND

UP

PADC

REF

RPI2

RPI1

RPO

BTI

RO2

RO1

VCC

Function

MUTE terminal

Ground terminal

DC impedance control

terminal

Pad control terminal

Internal reference voltage

Output terminal

Non-inversion input

terminal

of receiving Input Amp.

Inversion Input terminal

of receiving input Amp.

Output terminal of

Receiving input Amp.

Dial confirmation sound

(Beep Tone, DTMF),

monitor

sound input terminal

Receiving output terminal

Inversion output

Receiving output terminal

Non-inversion output

Internal power supply

voltage terminal

Explanation

Switching terminal of transmit signal with MFI input signal

in transmitting system.

Switching terminal of receiving signal with BTI input signal

in receiving system.

“L” State—Signal which is input from MFI is output to

VL terminal (1 pin)

Signal which is input from BTI is output to

terminals RO1 and RO2.

“H” or “ OPEN” state

Transmitting input signal is output to VL terminal

( 1 pin). Receiving input signal is

output to terminals RO1 and RO2 1(9 pin,18 pin)

This terminal is pulled up by constant-current circuit

Connected to negative output of diode bridge circuit.

When this terminal is connected to GND terminal 1(0 pin)

directly or through resistance. DC potential of VL terminal

( 1 pin) can be in-creased up to max. 1.5V (TYP.) in the

same line current.

This function has no relation to the state of MUTE terminal.

When this terminal is connected to GND terminal 1(0 pin)

or VCC terminal ( 20 pin) through resistance, operation cur-

rent of gain control (Auto-PAD) performed by line current

can be controlled.

Voltage of this terminal is used as a reference voltage of in-

ternal amplifiers.

Never used this terminal for an external power supply.

Apply DC bias to this terminal from REF terminal

( 13 pin) through resistance.

Receives negative feedback from RPO terminal (16 pin).

Makes negative feedback to RPI1 terminal 1( 5 pin).

Signal which is input to this terminal is output to terminals

RO1 and RO2 ( 19 pin and 18 pin) only when MUTE ter-

minal ( 9 pin) is in “L” state. Since this terminal is biased

to about the same potentialas REF terminal (3 pin), avoid

direct impressing external DC voltage through capacitor at

in-putting external signal

Output terminal to receiver. Signal of which phase is

negative to RO1 terminal (19 pin), is output.

Output terminal to receiver, Signal of which phase is

negative to RO2 terminal ( 18 pin), is output

Power supply of internal amplifiers

5

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