Samsung KA2425B, KA2425AD Datasheet
KA2425A SPEECH NETWORK WITH DIALER INTERFACE
ORDERING INFORMATION
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 .
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
PIN CONFIGURATION
MIC
1
2
TXI
TXO
STA
CC
3
4
5
KA2425A
20-SOP-375
Device Package Operating Temperature
KA2425B 18-DIP-300A
KA2425AD 20-SOP-375
MT
18
17
MS
TI
16
V
15
DD
V+
14
- 20°C ~ + 60°C
6
EQ
7
RXI
RXO
8
RMT
9 10
Fig. 1
13
12
11
LR
LC
VR
V-
KA2425A SPEECH NETWORK WITH DIALER INTERFACE
V+
V+
ABSOLUTE MAXIMUM RATINGS
Characteristic Symbol Value Unit
V+ Voltage
VDD (V+ = 0)
MT,MS inputs
V
LR
Storage Temperature
RECOMMENDED OPERATING CONDITIONS (Ta = 25°C)
Characteristic Symbol Value Unit
I
(Instantaneous)
TXO
V+ (Voltage :Speech Mode
Tone Dialing Mode
Operating Temperature
V
V
V
V
T
T
V
C
DD
V
M
LR
STG
I
CC
+ (SM)
+(TM)
ORR
-1.0 ~ +18
-1.0 ~ +6
-1.0 ~ VDD +1
-1.0V~ V+ -3.0
-65 ~ +150
0 ~ 10
+1.5 ~ +15
+3.3 ~ +15
-20 ~ +60
V
V
V
V
°C
mA
V
V
°C
ELECTRICAL CHARACTERISTICS (T
a
Characteristic Symbol Test Conditions Min Typ Max Unit
SYSTEM SPECTIFICATIONS (Refer to Fig.3 and Fig.4)
TX Gain from VS to V
+
Gain Change
Distortion
Output Noise
R
X
V
/ V
RXO
S
RX Gain Change
Distortion
DTMF Driver
V+ / V
IN
Sidetone Level
V
/ V+
RXO
Sidetone Rejection
V
RXO
(Figure 4)}dB -
{ {
V
RXO
(Figer 3)} dB
G
V (TX)
∆G
V (TX)
THD
V
NO (TX)
G
V (RX)
∆G
V (RX)
THD
G
V (MF)
G
V (ST)
RST IL = 20mA 12 18 - dB
Tip-Ring Voltage (including polarity
guard
bridge drop of 1.4v)
V
TR
(Speech Mode)
AC impedance
Speech mode (incl. C6,See Figure 4)
Z
ac
Zac = (600)V +/ (VS - V+)
Tone Mode (including C6)
None : Typicals are tested or guaranteed.
= 25°C)
Figure (IL = 20mA)
TX
f = 1.0KHZ, IL = 20mA
(See Figure.4) IL = 60mA
RX
20mA < IL , 60mA
28
IL = 60mA
-6.0
-16
-5.0
29.5
-4.5
-
2.0
-
-15
-3.0
-
2.0
31
-3.6
-
11
-
-13
-2.0
-
IL = 20mA 3.2 4.8 6.2 dB
IL = 20mA
IL = 60mA
IL = 5.0mA
IL = 10mA
IL = 20mA
IL = 40mA
IL = 60mA
IL = 20mA
IL = 60mA
-
-28
-
-13
-
2.4
-
3.9
-
4.6
-
5.6
-
6.6
-
750
-
300
-
1650
-
-
-
-
-
-
-
-
-
-
dB
dB
%
dBmc
dB
dB
%
dB
V
DC
Ω
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