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PDF GL6965 Data sheet ( Hoja de datos )

Número de pieza GL6965
Descripción Telephone Speech Network with Dialer Interface
Fabricantes Hynix Semiconductor 
Logotipo Hynix Semiconductor Logotipo



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GL6965
GL6965
Telephone Speech Network with Dialer Interface
Description
The GL6965 is a bipolar integrated circuit for
use in electronic telephones.
The GL6965 has low operating voltage, it pro-
vides an excellent branch performance.
It has line voltage increasing circuit by the
exter-nal terminal. Transmitting and receiving
gains automatically vary according to the line
current.
Pin Configurations
VL 1
TO1 2
TO0 3
AC BIAS 4
MFI 5
TPO 6
TPI 1 7
TPI 2 8
MUTE 9
GND 10
20 VCC
19 RO 1
18 RO 2
17 BT 1
16 RPO
15 RPI 1
14 RPI 2
13 REF
12 PADC
11 UP
Features
• Externally adjustable transmitting,
receiving and Sidetone gains.
• Switching between transmitting output
and DTMF output is possible.
• Direct interface with light and compact
ceramic transmitter-receiver is possible.
• Receiver follow impedance type can
also be used.
• Gain is automatically controlled accor-
ding to the line current (Auto-PAD
function).
• The line voltage can be increased by
the external terminal (Up function).
• PKG is 20 pin DIP.
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GL6965 pdf
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
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GL6965 arduino
TRANSMITTER
GL6965
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