bh7779k ROHM Co. Ltd., bh7779k Datasheet - Page 5

• Manufacturer Part Number: bh7779k
• Description: Audio Signal Processing System
• Manufacturer: ROHM Co. Ltd.

Pin function - 2 / 3
Pin function - 3 / 3
Pin No.
Video ICs
37, 35
38, 36
I / O circuit; EF: emitter follower, P-P: push pull, B: base, and C: collector.
All numerical values are standardized values.
I / O circuit; EF: emitter follower, P-P: push pull, B: base, and C: collector.
All numerical values are standardized values.
Pin No.
54, 53
61, 60
63, 62
23
24
25
26
27
28
39
40
41
42
43
44
45
46
47
48
49
50
51
52
55
56
57
58
59
64
REC HSW CTRL
Hi-Fi OUT L, R
FM REC OUT
Hi-Fi IN L, R
NA PB OUT
NA PB NFB
BPF f
AHSWP IN
Pin name
NA PB IN
FM ALC
NA ALC
LINE OUT L, R
NA FB
PB EQ
NA REC OUT
LINE1 IN L, R
LINE2 IN L, R
GNN
NA HEAD IN
VCB
NA REC FB
HEAD EQ
Pin name
MIX OUT
MIX ALC
REC EQ
0
VREFP
ADJ
GND
ERM
ERP
V
V
CC
EE
MODEM and BPF V
BPF center frequency adjustment.
FM ALC time constant setting.
High-voltage head switch control (BA7755).
Audio head switching pulse input.
EE: recording FM output. Sine wave output.
PB: BPF output monitor.
PNR audio output.
Hi - Fi input for output switcher.
Normal line amplifier feedback.
Normal line amplifier ALC time constant setting.
Attack and recovery time setting.
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.
Normal REC amplifier output.
Recording equalizer switch.
Normal REC amplifier feedback.
ALC time constant setting for mixer amplifier
Attack and recovery time setting.
Mixer amplifier output for RF converter.
Line output
V
V
Input / output switch GND.
V
V
LINE 1 input (L and R).
LINE 2 input (L and R).
V
and precharge function.
CC
CC
EE
EE
CC
/ 2 reference voltage. With power on detect
regulator error output.
regulator.
regulator.
regulator error output.
CC
.
Function
Function
Pin voltage
Pin voltage
EE: 3.3V
PB: 3.3V
– 5.0V
– 5.0V
– 5.0V
5.0V
1.9V
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
0.0V
0.0V
0.0V
5.0V
5.0V
0.0V
0.0V
0.0V
2.5V
—
—
EF (NPN) ~ 2.5k
EF (NPN) ~ 200
EF (NPN) ~ 500
EF (NPN) ~ 200
EF (NPN) ~ 500
EF (P - P) ~ 50
REC: EF (PNP)
REC: B (NPN)
300k / 28
100k / 22
OPEN / 22
EF: (P - P)
I / O circuit
BH7779K
EF: (P - P)
I / O circuit
EF (NPN)
C (NPN)
B (NPN)
B (NPN)
C (NPN)
C (PNP)
B (PNP)
93.5k
93.5k
100k
47k
800
330
10k
—
—
—
—
—
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