bh7775k ROHM Co. Ltd., bh7775k Datasheet - Page 5

• Manufacturer Part Number: bh7775k
• Description: Vcr Audio Signal Processing System
• Manufacturer: ROHM Co. Ltd.

Pin function - 2 / 2
Video ICs
All numerical values are standardized values.
Pin No.
I / O circuit; EF: emitter follower, P-P: push pull, B: base, and C: collector.
54, 53
61, 60
63, 61
39
40
41
42
43
44
45
46
47
48
49
50
51
52
55
56
57
58
59
64
LINE OUT L, R
NA REC OUT
LINE1 IN L, R
LINE2 IN L, R
NA HEAD IN
NA PB OUT
NA REC FB
NA PB NFB
HEAD EQ
NA PB IN
Pin name
MIX OUT
MIX ALC
REC EQ
NA ALC
VREFP
NA FB
PB EQ
GNN
GND
ERM
ERP
V
V
CC
EE
Normal line amplifier feedback.
Normal line amplifier ALC time constant setting
(attack and recovery time).
Normal line amplifier playback input.
Normal PB amplifier output.
Normal PB amplifier equalizer switch.
Normal PB amplifier feedback.
Normal audio GND.
Normal audio playback input.
Head resonance equalizer switch terminal.
Normal REC amplifier output.
Recording equalizer setting resistor terminal.
Normal REC amplifier feedback terminal.
ALC time constant setting for mixer amplifier
(attack and recovery time).
Mixer amplifier output for RF converter.
Line output
V
V
Output switch, regulator GND.
V
V
LINE 1 input (L and R).
LINE 2 input (L and R).
V
and precharge function.
CC
CC
EE
EE
CC
regulator.
regulator error output.
regulator error output.
regulator
/ 2 reference voltage. With power on detect
Function
Pin voltage
– 5.0V
– 5.0V
– 5.0V
0.0V
0.0V
0.0V
0.0V
0.0V
0.0V
0.0V
0.0V
0.0V
0.0V
0.0V
0.0V
0.0V
0.0V
5.0V
5.0V
0.0V
0.0V
0.0V
2.5V
EF (NPN) ~ 500
EF (NPN) ~ 500
EF (P-P) ~ 50
REC: EF (P-P)
REC: B (NPN)
OPEN / 25
300k / 29
I / O circuit
BH7775K
EF (NPN)
EF: (P-P)
105.2k
C (NPN)
B (NPN)
B (NPN)
C (PNP)
90.2k
90.2k
800
330
10k
1k
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