AN3389SB
s
Pin Descriptions (cont.)
Pin No.
Pin name
DC voltage (V
CC
=5V)
Equivalent circuit
ICs for VCR
Description
31
31
AGC IN
3.6V for
playback
6kΩ
200Ω
AGC amplifier input
400Ω
(For playback)
32
AGC Det.
0.1µF
32
AGC amplifier detection. Connect-
ed to an external capacitor
32
PLUS DCFB
2.2V for
recording
32
100Ω
100Ω
0.1µF
Connecting to an external capacitor
for recording amplifier DC voltage
feedback for the recording mode.
50kΩ
AGC OUT
33
PB Rec SW
3.1V for
playback
33
AGC amplifier output as well as
playback/recording mode selection
control. Recording mode is selected
when this pin is low.
34
34
Rec IN
3V
5kΩ
200Ω
Recording signal input
10