GL6552
Pin Description
No.
Symbol
Function
Output terminal of bias circuit (Band Gap of reference). It is an internal
reference voltage used for supplying a constant voltage to the compressor
and the expander.
1
VREF
2
3
4
EXP IN
Expander input terminal
External rectifing capacitor is connected to this terminal. Attack and decay
time of expander is determined by capacitor.
Expander output terminal
EXP RECT
EXP OUT
It is an expander mute terminal of a compander.
“L” state – expander mute is executed.
“H” state – expander is executed.
5
6
EXP MUTE
It is an compander mute terminal of a compander.
“L” state – compressor mute is executed.
“H” state – compressor is executed.
COMP MUTE
7
8
GND
Ground terminal
Compressor Mic Amp noninverting input terminal. It is used as input
terminal for voice signal.
COMP IN
Compressor Mic Amp inverting input terminal. It is used for determining
Mic Amp gain by resistor
9
COMP NF
External rectifing capacitor is connected to this terminal. Attack and decay
time of expander is determined by capacitor.
10 COMP RECT
11 C-ACF
Feedback coupling capacitor is connected to this terminal. Low cut-off
frequency of compressor is determined by this capacitor.
12 COMP OUT
13 ALC
Compressor output terminal.
It is a reference voltage input terminal of ALC. ALC circuit may be turned
off according to the ALC reference voltage.
Supply voltage terminal
14 VCC
3
HYNIX [ HYNIX SEMICONDUCTOR ]
