KA2425A
INTRODUCTION
SPEECH NETWORK WITH DIALER INTERFACE
The KA2425A is telephone speech network integrated
circuit which includes transmit amp, receive amp,
side tone amp, DC loop interface function, DTMF input,
voltage regulator for speech, a regulated output voltage
for a dialer, and equalization circuit .
8-DIP-300A
FEATURES
•
Low voltage operation (1.5v : speech)
•
Transmit, receive, side tone and DTMF level are
controlled by external resistors
•
Regulated voltage for dialer
•
Loop length equalization
•
MUTE function
•
Linear interface for DTMF
20-SOP-375
ORDERING INFORMATION
Device
KA2425B
KA2425AD
Package
18-DIP-300A
20-SOP-375
Operating Temperature
- 20°C ~ + 60°C
PIN CONFIGURATION
MIC
1
2
3
4
5
6
7
8
9
Fig. 1
18
17
16
15
KA2425A
14
13
12
11
10
MT
TXI
MS
TXO
TI
STA
V
DD
CC
V+
EQ
LR
RXI
LC
RXO
VR
RMT
V-