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KA8603 UNIVERSAL SPEECH NETWORK
ORDERING INFORMATION
INTRODUCTION
The KA8603 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 KA8603 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)
BLOCK DIAGRAM
16-DIP-300A
16-SOP-225
Device Package Operating Temperature
KA8603 16-DIP-300A
KA8603D 16-SOP-225
- 25°C ~ + 75°C
MUTE
MIC-
MIC+
Vcc
13
12
10
RXI
6
7
11
MF
INVERTER
RXI
RX AMP
MXI
MIC AMP
ATTENU
ATOR
BIAS &
REFERENCE
9 8
GND CST VST AGC TXGA2 R
DTMF AMP
14 15 3
AGC
BAND GAP
REF
TX AMP
V
L
1
5
RXGA
4
RXO
2
TXGA1
16
DC
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KA8603 UNIVERSAL SPEECH NETWORK
PIN CONFIGURATION
TXGA1
TXGA2
RXO
RXGA
MIC-
MIC+
CST
1
V
L
2
3
KA8603
4
5
6
7
8
16
RDC
15
AGC
14
VST
13
Vcc
12
MUTE
11
MF
10
RXI
9
GND
PIN DESCRIPTION
Pin No Symbol Description
1 V
L
2 TXGA1 TX gain adjustment
3 TXGA2 TX gain adjustment
4 RXO RX output
5 RXGA RX gain adjustment
6 MIC- Mic(-) input
7 MIC+ Mic(+) input
8 CST Current stabilizer
9 GND Ground
10 RXI RX input
11 MF DTMF Input
12 MUTE Mute ‘High’ : DTMF mode, Mute ‘Low’ : speech mode
13 V
CC
14 VST Voltage stabilizer
15 AGC Automatic gain control
16 R
DC
Positive power line and TX Amp output
Internal power supply pin
DC Resistance control
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KA8603 UNIVERSAL SPEECH NETWORK
V
= 3mVrms
ABSOLUTE MAXIMUM RATINGS
Characteristic Symbol Value Unit
Line Voltage V
Line Current I
Surge Line Current I
L(SURGE)
Power Dissipation P
Operating Temperature T
Storage Temperature T
L
L
D
ORP
STG
15 V
150 mA
200 mA
1.0 W
- 25 ∼ 75 °C
- 55 ∼ 150 °C
ELECTRICAL CHARACTERISTICS
(Ta = 25°C, f = 1KHz, IL = 15mA, unless otherwise noted)
Characteristic Symbol Test Conditions Min Typ Max Unit
IL = 4mA - 2.1 -
Line Voltage V
Line Voltage with R
Line Voltage with R
UP
DOWN
TX Gain G
TX Gain frequency response
TX Dynamic output voltage
MIC Input Impedance Z
∆G
V
V
LU
V
LD
V (TX)
O (TX)
I(MIC)
TXF
IL = 15mA 28.5 30.5 32.5
RX Gain G
RX Gain frequency response
RX Dynamic output voltage
∆G
V
V(RX)
RXF
O (RX)
IL = 15mA 3.55 3.9 4.25 V
L
IL = 50mA 4.1 4.6 5.1
IL = 140mA - 6.45 7.0
Between Pin14 & Pin 16
R
= 220KΩ
up
Between Pin 14& Pin 1
R
= 330KΩ
DOWN
RTX = 68 KΩ
IL = 15mA 49.5 51.5 53.5
IL = 50mA 45.5 47.5 49.5 dB
4.15 4.35 4.55 V
3.25 3.45 3.65 V
IL = 80mA 43.5 45.5 47.5
f = 300 to 3400Hz -
± 0.2
THD = 2% - 1.6 THD = 10% 1.7 2.2 -
- - 64 -
R
LOAD
= 150Ω+10u
IL = 50mA 24.5 26.5 28.5
IL = 80mA 22.5 24.5 26.5
f = 300 to 3400Hz THD = 2% (RL = 150Ω)
± 0.2
0.22 0.29 -
THD = 10% 0.30 0.40 -
- dB
Vrms
KΩ
dB
- dB
Vrms
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KA8603 UNIVERSAL SPEECH NETWORK
ELECTRICAL CHARACTERISTICS
(Ta = 25°C, f = 1KHz, IL = 15mA, unless otherwise noted)
Characteristic Symbol Test Conditions Min Typ Max Unit
DTMF GAIN G
DTMF Input Impedance Z
MUTE Input Voltage V
TX Gain variation range by AGC
RX Gain variation range by AGC
TX Noise Output Voltage
(Psophometric weighted)
RX Noise Output Voltage
(Psophometric weighted)
V
IH (MUTE)
V
IL (MUTE)
∆G
∆G
V
V
V (MF)
I (MF)
TXA
RXA
TNO
RNO
RTX = 68KΩ (MUTE = H)
- - 20.7 -
- 1.5 - V
- - - 0.8
R
= 180KΩ
AGC
IL = 15 ~ 80mA
R
= 180KΩ
AGC
IL = 15 ~ 80mA
-
- - 50 - uV
23.5 25.5 27.5 dB
KΩ
CC
- -6 - dB
- -6 - dB
- -72 - dBmp
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KA8603 UNIVERSAL SPEECH NETWORK
APPLICATION CIRCUIT
10µF
TIP
RING
pin 14
12V
Rup
Zc Zr
120K
100nF
3.9K
390
200
620
1 13
V
L
RXI
RXI
AMP
10
16
V
DC
TXGA1 TXGA2MUTE
500p
20
220µF
+
V
CC
RXI
AMP
TX
AMP
CST
3 112 12 8 9 15 14
68K
3.6K 180K
+
100K
100pF
4
RXO+ RXGA
MF
5
GND AGC VST
RECEIVER
MIC
AMP
+
1µF
MIC-
6
7
MIC+
Rdown pin1
MIC
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