![](/html/d2/d29a/d29a996afd9625941349a5bdc2f7873c0469ff1ca467640b2b9067fdf415be15/bg1.png)
UNIVERSAL SPEECH NETWORK S1T8603
1
INTRODUCTION
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. (IL = 4mA)
ORDERING INFORMATION
Device Package Operating Temperature
S1T8603X01-D0B0 16−DIP−300A
− 25°C to +75°C
S1T8603X-S0B0 16−SOP−225
16−DIP−300A
16−SOP−225
![](/html/d2/d29a/d29a996afd9625941349a5bdc2f7873c0469ff1ca467640b2b9067fdf415be15/bg2.png)
S1T8603 UNIVERSAL SPEECH NETWORK
2
BLOCK DIAGRAM
PIN CONFIGURATION
12
5
13
6
7
11
9 8
BIAS &
REFERENCE
RXI
MXI
ATTENU
ATOR
14 15 3
AGC
BAND GAP
REF
4
16
1
2
10
INVERTER
RX AMP
MIC AMP
DTMF AMP
TX AMP
MUTE
RXI
MIC-
MIC+
MF
GND CST VST AGC TXGA2 R
DC
TXGA1
RXO
RXGA
V
L
Vcc
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
KA8603
V
L
TXGA1
TXGA2
RXO
RXGA
MIC-
MIC+
CST
RDC
AGC
VST
Vcc
MUTE
MF
RXI
GND
S1T8603