KA2425A Samsung, KA2425A Datasheet

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KA2425A

Manufacturer Part Number
KA2425A
Description
SPEECH NETWORK WITH DIALER INTERFACE
Manufacturer
Samsung
Datasheet
KA2425A
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
PIN CONFIGURATION
Low voltage operation (1.5v : speech)
Transmit, receive, side tone and DTMF level are
Regulated voltage for dialer
Loop length equalization
MUTE function
Linear interface for DTMF
controlled by external resistors
SPEECH NETWORK WITH DIALER INTERFACE
RXO
RMT
TXO
STA
MIC
RXI
TXI
CC
EQ
1
2
3
4
5
6
7
8
9
KA2425A
Fig. 1
18
17
16
15
14
13
12
11
10
KA2425B
KA2425AD
ORDERING INFORMATION
Device
LR
LC
VR
V-
MT
MS
TI
V
V+
DD
18-DIP-300A
20-SOP-375
Package
8-DIP-300A
20-SOP-375
Operating Temperature
- 20 C ~ + 60 C

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KA2425A Summary of contents

Page 1

... 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 ...

Page 2

... KA2425A SPEECH NETWORK WITH DIALER INTERFACE ABSOLUTE MAXIMUM RATINGS Characteristic V Voltage + MT,MS inputs V LR Storage Temperature RECOMMENDED OPERATING CONDITIONS Characteristic I (Instantaneous) TXO V (Voltage :Speech Mode + Tone Dialing Mode Operating Temperature ELECTRICAL CHARACTERISTICS Characteristic SYSTEM SPECTIFICATIONS (Refer to Fig.3 and Fig.4) T Gain from V ...

Page 3

... KA2425A SPEECH NETWORK WITH DIALER INTERFACE ECTRICAL CHARACTERISTICS Characteristic SYSTEM AMPLIFIERS T X Gain TXO Bias Voltage TXO Bias Voltage TXO Bias Voltage TXO Bias Voltage TXI input Resistance R X RXO Bias voltage RXO Source current RXO Source current RXO High Voltage ...

Page 4

... KA2425A SPEECH NETWORK WITH DIALER INTERFACE ELECTRICAL CHARACTERISTICS Characteristic DIALING INTERFACE MT Input Resistance MT Input High Voltage MT Input Low Voltage MS Input Resistance MS Input High Voltage MS Input Low Voltage TI Input Resistance DTMF Gain LINE INTERFACE V+ Current (Pin 12 Grounded) Speech Mode Speech/Pulse Modes Tone Mode ...

Page 5

... Fig 2. DTMF 150K V+ 503 8.2K 33K KA2425A 10K 6 20mVrms 14 15 1KHz LOOP 203 600 Microphone Equivalent Fig 3. Transmit and sidetone level test 150K V+ 503 8. KA2425A 20mVrms 1KHz I 203 LOOP Vs Fig 4. AC Impedance, Receive and Sidetone Rejection Test LOOP 10 204 Driver Test 150 ...

Page 6

... KA2425A SPEECH NETWORK WITH DIALER INTERFACE APPLICATION CIRCUIT H/S SW TIP - + RING 103 393 102 383 383 8.2K 14 223 220K 6 1 4.7K 3. 200 15 3 KA2425A 120K + 22 F MIC 102 2. SPEAKER 472 ...

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