KA8504
SPEECH NETWORK WITH DIALER INTERFACE
INTRODUCTION
16-DIP-300A
The KA8504 is a telephone speech network which includes TX Amp,
RX Amp and DTMF Amp.
The gain is controlled automatically by sensing the line current. The
circuit internally performs electronic switching between dialing and
speech by mute signal.
FEATURES
•
Low line current operation
•
Mute function
•
DTMF signal interface
•
Easy gain control
ORDERING INFORMATION
Device
KA8504
Package
16-DIP-300A
Operating Temperature
- 40°C ~ + 85°C
BLOCK DIAGRAM
ROF
14
RXI 13
RX INPUT
AMP
RX GAIN
CONTROL
RX OUTPUT
AMP
15
RXO
GC 12
GAIN
CONTROLLER
5
MF
10
V
L
1
TX AMP
MIC+
TX GAIN
CONTROL
TX AMP
11
MIC-
2
CI
3
CO
6
MUTE
9
TOF
Fig. 1
SAMSUNG [ SAMSUNG SEMICONDUCTOR ]
