KL34018 IK Semicon Co., Ltd, KL34018 Datasheet - Page 2

• Manufacturer Part Number: KL34018
• Description: Linear Integrated Circuit Voice Switched Speaker Phone Circuit
• Manufacturer: IK Semicon Co., Ltd

MIC
SPE
AKE
R
RECEIVE
CHANNEL
2kΩ
Speaker
MIC
Contek
220kΩ
VB
MIC AMP
47kΩ
PEAK
LIMITER
Volume
6.8kΩ
Control
68kΩ
47μF
S2
SPEAKE
R AMP
0.1μF
SIGNAL/NOISE
DETECTOR
VB
20kΩ
24kΩ
15
14
9
0.1μF
TRANSMIT
CHANNEL
0.1μF
Fig 1 - Basic Line powered Speakerphone
SKO
SKG
2.7kΩ
MCI
470kΩ
4.7kΩ
ΤXΙ
VLC
24
3
47μF
RECEIVE VOLUME
CONTROL
ATTENUATOR
Internal Block Diagram
CONTROL
ΜCΟ
VB
10
21
0.01μF
4.7kΩ
47μF
RECEIVE
ATTENUATOR
Vcc
13
20
XDΙ
TRANSMIT
ATTENUATOR
91kΩ
TXO
RTX
4
2
3.3kΩ
30kΩ
TRANSMIT/
COMPARATOR
RECEIVE
TLI
RR
5
1
VCC
REGULATOR
18kΩ
RRX
Vcc
CP1
ENABLE
INPUT
TRANSMIT
LEVEL
DETECTOR
28
RECEIVE LEVEL
DETECTOR
11
4.3kΩ
47μF
0.05μF
ACF
RXO
26
25
4700pF
0.01μF
AGC
SKI
19
Switch
4700pF
17
Hook
S1
SIDE
TONE
CP2
V+
47kΩ
16
12
TRANSMIT
OUTPUT
DC INPUT
XDC
18
CS
23
RECEIVE
INPUT
T
R
200kΩ
SIDE
TONE
TLO
RLI
6
7
2.2MΩ
3.3kΩ
RLO
27
RXI
8
2.2MΩ
Rev. 00
KL34018
GND
22
TELEPHONE
LINE