KA2425A

SPEECH NETWORK WITH DIALER INTERFACE

INTRODUCTION

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 .

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

PIN CONFIGURATION

Fig. 1

Device

Package

Operating Temperature

KA2425B

18-DIP-300A

KA2425AD

20-SOP-375

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

KA2425A

MIC

TXI

TXO

STA

CC

EQ

RXI

RXO

RMT

MT

MS

TI

V+

LR

LC

VR

V-

- 20

°C ~ + 60°C

8-DIP-300A

ORDERING INFORMATION

20-SOP-375