KA8504 Datasheet, PDF (1/4 Pages) Samsung semiconductor – SPEECH NETWORK WITH DIALER INTERFACE

KA8504
SPEECH NETWORK WITH DIALER INTERFACE
INTRODUCTION
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.
16-DIP-300A
FEATURES
• Low line current operation
• Mute function
• DTMF signal interface
• Easy gain control
BLOCK DIAGRAM
ROF
14
RXI ¹³
RX INPUT
AMP
RX GAIN
CONTROL
GC ¹²
GAIN
CONTROLLER
ORDERING INFORMATION
Device
KA8504
Package
16-DIP-300A
Operating Temperature
- 40°C ~ + 85°C
RX OUTPUT
AMP
15 _RXO
5 _MF
V_L ¹
TX AMP
2
CI
TX GAIN
CONTROL
TX AMP
3
6
9
CO
MUTE
TOF
Fig. 1
10 _MIC+
11 _MIC-