3DUWLFXODU
3XUSRVH,&
Communication IC
s
Telephone LSI
Speech
Speech
circuit
Rectifica-
tion, power
supply
circuit
Hook
switch
Surge
protection
circuit
Phone line
1 2 3
4 5 6
7 8 9
Dialer
Ringer
*
0 #
Switchable dialer
Speech
µ
PC7002
Auto/manual pad function Adjustable receiver
gain, internal receiver amplifier
• 28-pin SDIP
101
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