m65845 ETC-unknow, m65845 Datasheet - Page 9

• Manufacturer Part Number: m65845
• Description: Digital Echo With Microphone Mixing Circuit
• Manufacturer: ETC-unknow

(4) MIC SW
Input impedance to 35 pin is so high (1M ) that ALC base voltage can be determined
by division resistance.
Input low level to 31 pin (MIC SW) ,then microphone and echo signal can be cut.
ALC operation voltage (dBV)
at Vcc=5V
-10
+3
-2
-4
-6
-8
31 pin (MIC SW)
0
H or OPEN
DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
L
35
35 pin control voltage VALC (V)
R16
0.50
1.09
1.38
1.61
1.79
1.94
2.05
MIC SW
MITSUBISHI
ELECTRIC
R17(51k)
Vcc
OFF
ON
MITSUBISHI SOUND PROCESSOR ICs
C33(0.01µ )
ECHO SIGNAL
resistance R16 ( )
M65845AFP
MUTE
ON
OUTPUT
5.6k
15k
20k
24k
27k
33k
36k
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