ICs for VCR
AN3664NFB
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
Envelope det. out
Voltage
20
1.8 V at typical
VCC1
Forced normal out:
carrier level input
800 Ω
45 kΩ
Terminal voltage varies according to
L-channel input carrier level.
0 V
200 Ω
At forced normal, output impedance at forced normal
20
is approx. 400 Ω.
100 kΩ
10 kΩ
21
Noise det.:
1.9 V or more
VCC1
Detects the output which is the de-
modulated R-channel noise output
through an built-in second order HPF
(fC = 150K), with an external capaci-
tor.
1 kΩ
1 kΩ
2 kΩ
21
46 kΩ
22
PE
22
23
Mute CTL:
No fixed
VCC1
Mute on: 3.5 V or more
Mute off: 1.0 V or less
1 kΩ
50 kΩ
2 kΩ
3 kΩ 3 kΩ
2 kΩ
23
1 kΩ
1 kΩ
24
Selective resistor pin:
0 V
24
N.C. is possible at normal use.
3 kΩ
25
26
Refer to pin 13
Refer to pin 12
Emph. NF (R-channel): Refer to pin 13
Refer to pin 13
CCA out (R-channel): Refer to pin 12 Refer to pin 12
15
PANASONIC [ PANASONIC ]
