Video ICs
BH7801BK
Pin descriptions
•
Pin No.
Pin name
Function
Pin voltage
0.0V
0.0V
—
I / O circuit
150kΩ
2, 1, 3
TUNER IN L, R, M TUNER input (L, R, M)
4
5
6
7
8
Hi-Fi ALC
SCL
ALC time constant setting for Hi-Fi audio
EF (NPN) ~ 200Ω
B (PNP)
CLOCK input for I2C BUS control
DATA input for I2C BUS control
GND for I2C BUS control
SDA
—
B (PNP)
GNDD
FSC IN
—
—
fSC input for VCO and BPF adjustment
0.0V
200kΩ
PNR attack and recovery time setting.
Attack R: 530Ω, Recovery R: 6.5kΩ
9, 25
NR TC L, R
WTNG L, R
– 5.0V
0.0V
—
—
Waiting characteristic, treble time constant
(External C = 0.022µF)
10, 24
NR emphasis time constant setting
(External C = 0.0047µF)
11, 23
12, 22
13
NR EMPH L, R
DC FB L, R
FM PB IN
0.0V
0.0V
0.0V
—
PNR operating reference potential point
11.5kΩ
100kΩ
Playback FM input 660mVP-P Typ.
Input coupling capacitor (GND ~ VCC)
ENVE OUT
/ ADJ FLAG
/ Hi-Fi DET
FM Lch signal component envelope output
/ Hi-Fi DET output / ADJ FLAG output for ADJ
EE: 0.8V
PB: 1.0V
EE: 50kΩ
PB, ADJ: EF (NPN)
14
15
16
17
18
19
20
GNDM
GND for PNR, MODEM and BPF
Center frequency adjustment for FM BPF
VCO control current setting
0.0V
1.9V
2.5V
5.0V
0.0V
—
—
EF (NPN) ~ 200Ω
EF (NPN)
BPF f0 ADJ
VCO f0 ADJ
VCCM
VCC for MODEM and BPF
—
FM ALC
FM ALC time constant setting
Audio head switching pulse input
EF (NPN) ~ 2.5kΩ
B (PNP)
AHSWP IN
EE: recording FM output, sine wave output
PB: FM BPF output monitor
21
26
27
FM REC OUT
NORMAL IN
MIX ALC
EE: 3.3V
0.0V
EF (NPN) ~ 200Ω
50kΩ
Normal input
ALC time constant setting for mixer amplifier.
Attack and recovery time setting
– 5.0V
EF (NPN) ~ 500Ω
28
30, 29
31
MIX OUT
Mixer amplifier output for RF converter
Line output
0.0V
0.0V
0.0V
—
EF (NPN)
330Ω
LINE L, R OUT
NORMAL OUT
MUTE CTRL
LINE2 L, R IN
Normal output
EF (P-P)
3kΩ ( > 2.5V)
88kΩ
32
Line output mute control input
LINE2 input (L, R)
34, 33
0.0V
VCC / 2 reference voltage
(power on detect and pre-charge functions)
35
VREFP
2.5V
10kΩ
36
37
VCC
VCC regulator
5.0V
5.0V
—
C (NPN)
—
ERP
VCC regulator error output
I / O switch GND
VEE regulator
38
GND
0.0V
39
VEE
– 5.0V
0.0V
—
41, 40
42
LINE1 IN L, R
ERM
LINE1 input (L, R)
VEE regulator error output
BS input (L, R)
88kΩ
C (PNP)
88kΩ
– 5.0V
0.0V
44, 43
BS IN L, R
I / O circuit; EF: emitter follower, P-P: push pull, B: base, and C: collector
All numerical values are standardized values.
3