UNIVERSAL SPEECH NETWORK
S1T8603
INTRODUCTION
16−DIP−300A
The S1T8603 can fulfill the standards of other countries by changing
the external component. Dynamic or piezoelectric type can be used
with receiver. Each gain is controlled with AGC in accordance with the
line current. The S1T8603 can be operated down to D.C line 1.6V.
FEATURES
•
•
•
•
•
•
•
Independent adjustment of DC resistance and AC impedance.
ECM or dynamic microphone can be used.
DTMF signal interface.
Mute function
Operates at the low line voltage (1.6V)
Low or high impedance receiver type can be used.
Low line current operation. (I
L
= 4mA)
16−SOP−225
ORDERING INFORMATION
Device
S1T8603X01-D0B0
S1T8603X-S0B0
Package
16−DIP−300A
16−SOP−225
Operating Temperature
−
25°C to +75°C
1
S1T8603
UNIVERSAL SPEECH NETWORK
BLOCK DIAGRAM
Vcc
13
MUTE 12
INVERTER
V
L
1
5
RXI
RXI 10
4
RX AMP
RXGA
RXO
MXI
2
MIC-
MIC+
6
7
ATTENU
ATOR
BIAS &
REFERENCE
DTMF AMP
MIC AMP
TX AMP
TXGA1
MF 11
AGC
BAND GAP
REF
9
GND
8
CST
14
VST
15
3
16
R
DC
AGC TXGA2
PIN CONFIGURATION
V
L
TXGA1
TXGA2
RXO
RXGA
MIC-
MIC+
CST
1
2
3
4
5
6
7
8
16
15
14
RDC
AGC
VST
Vcc
MUTE
MF
RXI
GND
KA8603
S1T8603
13
12
11
10
9
2
UNIVERSAL SPEECH NETWORK
S1T8603
PIN DESCRIPTION
Pin No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
V
L
TXGA1
TXGA2
RXO
RXGA
MIC-
MIC+
CST
GND
RXI
MF
MUTE
V
CC
VST
AGC
R
DC
Description
Positive power line and TX Amp output
TX gain adjustment
TX gain adjustment
RX output
RX gain adjustment
Mic(-) input
Mic(+) input
Current stabilizer
Ground
RX input
DTMF Input
Mute
‘High’:
DTMF mode, Mute
‘Low’:
speech mode
Internal power supply pin
Voltage stabilizer
Automatic gain control
DC Resistance control
ABSOLUTE MAXIMUM RATINGS
Characteristic
Line Voltage
Line Current
Surge Line Current
Power Dissipation
Operating Temperature
Storage Temperature
Symbol
V
L
I
L
I
L(SURGE)
P
D
T
ORP
T
STG
Value
15
150
200
1.0
−
25 — 75
−
55 — 150
Unit
V
mA
mA
W
°C
°C
3
S1T8603
UNIVERSAL SPEECH NETWORK
ELECTRICAL CHARACTERISTICS
(Ta = 25°C, f = 1kHz, I
L
= 15mA, unless otherwise noted)
Characteristic
Line Voltage
Symbol
V
L
Test Conditions
I
L
= 4mA
I
L
= 15mA
I
L
= 50mA
I
L
= 140mA
Line Voltage with R
UP
Line Voltage with R
DOWN
TX Gain
V
LU
V
LD
G
V (TX)
Between Pin14 & Pin 16
R
up
= 220kΩ
Between Pin 14& Pin 1
R
DOWN
= 330kΩ
R
TX
= 68kΩ
V
I
= 3mVrsm
I
L
= 15mA
I
L
= 50mA
I
L
= 80mA
TX Gain frequency response
TX Dynamic output voltage
∆G
TXF
V
O(TX)
f = 300 to 3400Hz
THD = 2% THD = 10%
−
R
LOAD
=
150Ω+10u
I
L
= 15mA
I
L
= 50mA
I
L
= 80mA
RX Gain frequency response
RX Dynamic output voltage
∆G
RXF
V
O(RX)
f = 300 to 3400Hz
THD = 2% (R
L
= 150Ω)
THD = 10%
R
TX
= 68KΩ (MUTE = H)
−
−
−
R
AGC
= 180KΩ I
L
= 15 ~ 80mA
R
AGC
= 180KΩ I
L
= 15 ~ 80mA
−
−
Min.
−
3.55
4.1
−
4.15
3.25
49.5
45.5
43.5
−
−
1.7
MIC Input Impedance
RX Gain
Z
I(MIC)
G
V(RX)
−
28.5
24.5
22.5
−
0.22
0.30
23.5
−
1.5
−
−
−
−
−
Typ.
2.1
3.9
4.6
6.45
4.35
3.45
51.5
47.5
45.5
±
0.2
1.6
2.2
64
30.5
26.5
24.5
±
0.2
0.29
0.40
25.5
20.7
−
−
−6
−6
−72
50
Max.
−
4.25
5.1
7.0
4.55
3.65
53.5
49.5
47.5
−
−
−
−
32.5
28.5
26.5
−
−
−
27.5
−
V
CC
0.8
−
−
−
−
dB
dB
dBmp
uV
dB
kΩ
V
dB
Vrms
dB
kΩ
dB
Vrms
dB
V
V
V
Unit
DTMF GAIN
DTMF Input Impedance
MUTE Input Voltage
G
V (MF)
Z
I (MF)
V
IH (MUTE)
V
IL (MUTE)
∆G
TXA
∆G
RXA
V
TNO
V
RNO
TX Gain variation range by AGC
RX Gain variation range by AGC
TX Noise Output Voltage
(Psophometric weighted)
RX Noise Output Voltage
(Psophometric weighted)
4
UNIVERSAL SPEECH NETWORK
S1T8603
APPLICATION CIRCUIT
10
µ
F
+
TIP
620
RING
12V
120K
1
V
L
100nF
10
RXI
3.9K
TX
AMP
MIC
AMP
220
µ
F
+
100K
RECEIVER
100pF
13
V
CC
RXI
AMP
RXI
AMP
4
RXO+
5
RXGA
MIC-
6
390
16
pin 14
Rup
200
V
DC
TXGA1
2
TXGA2 MUTE CST
3
12
8
11
MF
GND
9
AGC
15
VST
14
7
MIC+
MIC
Rdown pin1
+
1
µ
F
Zc
Zr
500p
20
68K
3.6K
180K
Figure 1.
5
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