ka8512 Samsung Semiconductor, Inc., ka8512 Datasheet - Page 2

• Manufacturer Part Number: ka8512
• Description: Compandor
• Manufacturer: Samsung Semiconductor, Inc.

KA8512
PIN CONFIGURATION
PIN DESCRIPTION
Pin No
1
2
3
4
5
Symbol
EMUTE
V
ERC
EPI
EO
REF
It is a voltage reference (V
to the compressor and expander of compandor.
It is SUM AMP input terminal of expander. The voice signal recoverd after
the demodulation waveform from the receiver passed through the 2’nd order
low pass filter enters this terminal.
This terminal is used for converting waveform from the full wave rectifier to
DC element at the rectifier block of expander
(R X C = 22msec)
It is an output terminal of expander, which a regenerated voice signal
comes out.
It is an expander mute terminal of compandor and the final mute block
of an expander located next to the receiver terminal. It blocks the data sig-
nal of MICOM being transmitted to an user, and is connected to the RX
mute terminal of MICOM.
Expanding is executed if this terminal is high, and expander mute is exe-
cuted if it is low.
EMUTE
CMUTE
V
GND
ERC
R E F
EPI
EO
1
2
3
4
5
6
7
KA8512
REF
=1V) used for supplying a constant voltage
14
13
12
11
10
9
8
Description
V
ALC
CO
AGIC
CRC
CPI-
CPI+
C C
COMPANDOR