Datasheet S1T2425A01-D0B0 Datasheet (Samsung)

Page 1
SPEECH NETWORK WITH DIALER INTERFACE S1T2425A
INTRODUCTION
18DIP300A
The S1T2425A 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
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
ORDERING INFORMATION
Device Package Operating Temperature
S1T2425A01-D0B0 18DIP300A 20 to + 60°C
PIN CONFIGURATION
MIC
1
TXI
2
TXO
3
STA
4
CC
EQ
RXI
5
6
7
S1T2425A
18
17
16
15
14
13
12
MT
MS
TI
V
V+
LR
LC
DD
RXO
RMT
8
9
11
10
VR
V-
1
Page 2
S1T2425A SPEECH NETWORK WITH DIALER INTERFACE
V+
ABSOLUTE MAXIMUM RATINGS
Characteristic Symbol Value Unit
V+ Voltage V VDD (V+ = 0) V MT,MS inputs V V
LR
Storage Temperature T
V
C
DD
M
LR
STG
RECOMMENDED OPERATING CONDITIONS (TA = 25°C)
Characteristic Symbol Value Unit
I
(Instantaneous) I
TXO
V+ (Voltage :Speech Mode V Tone Dialing Mode V Operating Temperature T
CC
+ (SM)
+(TM)
ORR
ELECTRICAL CHARACTERISTICS (Ta = 25°C)
Characteristic Symbol Test Conditions Min. Typ. Max. Unit
1.0 to +18 V
1.0 to +6 V
1.0 to VDD +1 V
1.0V to V+ -3.0 V
65 to +150 °C
0 to 10 mA +1.5 to +15 V +3.3 to +15 V
20 to +60 °C
SYSTEM SPECTIFICATIONS (Refer to Fig.3 and Fig.4)
TX Gain from VS to V Gain Change Distortion Output Noise
+
G
V (TX)
G
V (TX)
THD V
NO (TX)
TX
Figure (IL = 20mA) IL = 60mA
RX V
/ V
RXO
S
RX Gain Change Distortion
DTMF Driver V+ / V Sidetone Level V
RXO
IN
/ V+ G
G
V (RX)
G THD
G
V (MF) V (ST)
V (RX)
RX
f = 1.0kHZ, IL = 20mA (See Figure.4) IL = 60mA
IL = 20mA 3.2 4.8 6.2 dB IL = 20mA
IL = 60mA
Sidetone rejection
V
RXO
{ (figure 4)} dB
RST IL = 20mA 12 18 dB
V+
V
RXO
{ (figure 3)}dB
28
6.0
16
5.0
29.5
4.5
2.0 11
15
3.0
2.0
28
13
31
3.6
13
2.0
dB dB
%
dBmc
dB dB
%
dB
2
Page 3
SPEECH NETWORK WITH DIALER INTERFACE S1T2425A
ELECTRICAL CHARACTERISTICS (Ta = 25°C) (Continued)
Characteristic Symbol Test Conditions Min. Typ. Max. Unit
Tip-Ring Voltage (including polarity guard bridge drop of 1.4V) (Speech Mode)
AC impedance Speech mode (incl. C6,see fig.
4) Zac = (600)V +/ (VS - V+) Tone Mode (including C6)
SYSTEM AMPLIFIERS
TX Gain TXO Bias Voltage TXO Bias Voltage TXO Bias Voltage TXO Bias Voltage TXI input Resistance
RX RXO Bias voltage RXO Source current RXO Source current RXO High Voltage RXO Low Voltage
SIDETONE AMPLIFIER
V
TR
Z
ac
G
V (TX)
V
BIAS (SPM)
V
BIAS (TM)
V
OL (SPM)
V
OL (SPM)
R
I (TXI)
V
BIAS (AM)
I
SOURCE (SM)
I
SOURCE (PTM)
V
OH (AM)
V
OL (AM)
IL = 5.0mA IL = 10mA IL = 20mA IL = 40mA IL = 60mA
IL = 20mA IL = 60mA 20mA < IL , 60mA
TXI to TXO Speech/Pulse Mode Tone Mode Speech/Pulse Mode Speech/Pulse Mode
All Mode Speech Mode Pulse/tone Mode All Mode All Mode
24
0.45 VR −25 VR −25
0.45
1.5
200
VR −100
2.4
3.9
4.6
5.6
6.6
750 300
1650
26
0.52 VR −5.0 VR −5.0
125
10
0.52
2.0
400
VR −50
50
28
0.60
250
0.60
150
V
W
dB
xV
mV mV mV
k
xV
mA
µA mV mV
DC
R
R
Gain (TXO to STA) Speech Mode
Gv
(STA)
Speech Mode Pulse Mode Pulse Mode
STA Bias Voltage V
BIAS (STA)
MICROPHONE, RECEIVER CONTROLS
MIC Saturation Voltage V MIC Leakage Current I MAT Resistance R
RMT Delay t
SAT (MIC)
LKG (MIC)
RMT (SM)
R
RMT (DM)
D (RMT)
EQUALIZATION AMPLIFIER
GAIN (V + to EQ) Speech Mode Speech Mode
G
V (EQ)
Pulse Mode Pulse Mode
@VLR = 0.5V @VLR = 2.5V @VLR = 0.2V @VLR = 1.0V
15
21
15
21
dB
All Modes 0.65 0.8 0.9 xV
Speech Mode,1 = 500µA 50 125 mV Dialing Mode,Pin 1=3.0V 0 5.0 µA Speech Mode
Dialing Mode
5.0
8.0 10
15 18
k
Dialing to Speech 2.0 4.0 20 ms
@ VLR = 0.5V @ VLR = 2.5V @ VLR = 0.2V @ VLR = 1.0V
12
2.5
12
2.5
dB
R
3
Page 4
S1T2425A SPEECH NETWORK WITH DIALER INTERFACE
ELECTRICAL CHARACTERISTICS (Ta = 25°C) (Continued)
Characteristic Symbol Test Conditions Min. Typ. Max. Unit
EQ Bias Voltage Speech Mode Pulse Mode Speech, Pulse Mode
DIALING INTERFACE
V
BIAS (EQ)
@ VLR = 0.5V @ VLR = 0.5V @ VLR = 2.5V
0.66
1.3
3.3
V
dc
MT Input Resistance R MT Input High Voltage V MT Input Low Voltage V MS Input Resistance R MS Input High Voltage V MS Input Low Voltage
TI Input Resistance DTMF Gain G
LINE INTERFACE
V+ Current (Pin 12 Grounded) Speech Mode Speech/Pulse Modes Tone Mode
V+ Voltage Speech/Pulse Mode Speech/Pulse Mode Speech/Pulse Mode Tone Mode Tone Mode
LR Level Shift Speech/Pulse Mode Tone Mode
1 (MT) IH (MT) IL (MT) I (MS) IH (MS)
V
IL MS)
R
I (T1)
V (MF)
1+ V+ = 1.7V
V+ = 12V V+ = 12V
IL = 20mA
V+
IL = 30mA IL = 120mA IL = 20mA IL = 30mA
V
LR
V + -V
LR
50 100 k
VDD-0.3 V
- 1.0 V
280 600 k
2.0 V
1.25
0.3−V k
3.2 4.8 6.2 dB
4.5
5.5
6.0
2.6
3.0
7.0
4.1
4.5
7.1
8.4
8.8
3.2
3.7
8.2
4.9
6.4
2.7
4.3
9.0
12.5
14.0
3.8
4.4
9.5
5.7
6.2
mA
V
V
dc dc
dc dc
dc
dc
LC Terminal Resistance R
VOLTAGE REGULATORS
VR Voltage Load Regulation Line Regulation
V
Voltage
DD
Load Regulation (Dialing Mode) Line Regulation (All Modes) Max. Output Current Max. Output Current
VDD Current Leakage I
NOTE: Typicals are tested or guaranteed.
4
V
V V
V
V V
I
OSM (MAX)
I
ODM (MAX) LKG (VDD)
LC
R
O O
DD
O (DM) O (AM)
- 36 57 94 K
(V+ = 1.7V) 0mA < IR < 1.6mA
2.0V < V + < 6.5V (V+ = 4.5V)
0 < IDD < 1.6mA
4.0V < V + < 9.0V Speech Mode Dialing Mode
1.1
3.0
375
1.6
1.2 20 25
3.3
0.25 50
550
2.0
1.3
3.8
1000
3.6
V mV mV
V
dd
V
dd
mV
µA
mA
V + = 0, VDD = 3.0V 1.5 µA
dc
Page 5
SPEECH NETWORK WITH DIALER INTERFACE S1T2425A
TEST CIRCUIT
V+
14 13 12
22K
16
V
IN
400mVrms
1.0V
KA2425A
S1T2425A
18 17 10
204
Figure 1. DTMF Driver Test
+ 20µF
47
I
600
LOOP
20mVrms
1KHz
V+
10K
Vs
Microphone Equivalent
150K
8.2K
2
6
503
33K
4 7 8
KA2425A
S1T2425A
14 15 17
+
20µF
I
LOOP
600
203
150
3 11
18 13
12
10
47
Figure 2. Transmit and sidetone level test
204
10
150
503
5
Page 6
S1T2425A SPEECH NETWORK WITH DIALER INTERFACE
20mVrms
1KHz
150K
8.2K
4 7 8
2
6
14 15 17
20µF
+
203
Vs
503
KA2425A
I
LOOP
33K
S1T2425A
3 11
12
10
18 13
47
V+
Figure 3. Impedance, Receive and Sidetone Rejection Test
204
150
10
503
6
Page 7
SPEECH NETWORK WITH DIALER INTERFACE S1T2425A
APPLICATION CIRCUIT
H/S SW
TIP
RING
- +
102
103
383 383
393
220K
4.7K 3.3K
68Ω, 1/2
33µF
+
+
22µF
120K
6
4
15
KA2425A
S1T2425A
13
12
11
8.2K
14
223
1
102
2
200 2.2K
3
7
8
9
10
47µF
+
472
MIC
SPEAKER
7
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