KA8501A

SPEECH NETWORK WITH DIALER INTERFACE

INTRODUCTION

The KA8501A is a telephone speech network in-

tegrated circuit which includes transmit amp, receive

amp, DTMF amp, voltage regulator, line equalizer,

voltage comparator. It handles the voice signal, perfor-

ming the 2/4 wires interface and changing the gain on

both sending and receiving amplifiers to compensate

the line current. The KA8501A can work in fixed gain

mode.

FEATURES

• Adjusts sending and receiving attenuation length

• Regulated voltage for dialer

• Linear interface for DTMF

• Suitable for ceramic transducers

• Mute function

PIN CONFIGURATION

Fig. 1

Device

Package

Operating Temperature

KA8501A

16-DIP-300A

- 45

°C ~ + 70°C

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

KA8501A

MIC1

V +

MUTING

BIAS ADJ.

REGULATOR

REGULATOR

LINE CURRENT

MF

RXO2

RXO1

RXI +

RXI -

V -

MIC2

ORDERING INFORMATION

16-DIP-300A