BA7207AK Просмотр технического описания (PDF) - ROHM Semiconductor
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BA7207AK Datasheet PDF : 17 Pages
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Video ICs
BA7207AS / BA7207AK
BA7207AK (QFP44)
47µ
27p
100p
0.01µ
0.01µ
0.1µ
33 32 31
0.1µ
0.01µ
30 29 28
0.01µ
27 26
100µ
+
47µ
∆
25 24 23
VCC
34
35
36
0.1µ
37
∆
38
39
40
41
∆
42
LIM
PAL SCM
Vreg
×2
2.2MHz
BPF
PR
×2
LIM
EQ
P
R
P
4.3MHz
BPF—A
R
R
BELL
P
4.3MHz
BPF—B
PB
SYNC GATE
1.1MHz
BPF
÷4
REC
SYNC GATE
R
P
FREQUENCY
ADJUSTER
DET
VCO
MODE
CONTROL
P
R
SYNC GATE
TIMING
GENERATOR
SCM PAL
43
44
VR1 VR2
2k
VR
∗
2k
VR
∗
∗∗
7.5k 7.5k
1
2
3
4
5
6
7
8 9 10 11
VR3
0.01µ
100k
10k
33k
0.01µ
1k
12µ
+
∗
4700p
0.47µ
580p
22
0.1µ
21
0.01µ
20
LPF
19
18
17
16
15
∆
14
100p
0.01µ
13
12
PAL REC C.
REC C OUT.
VCC
SCM/PAL
REC/PB
PBIN
B/W
SYNC IN
PALPB C.
PB C OUT
RECIN
∗ To cancel the temperature characteristic of the ID, the resistors marked with asterisks should be of the metal film, and have a
temperature coefficient ± 100ppm / °C.
∆: Test pin. Connect to VCC if unused.
The 100pF capacitor connected to pin 16 is intended to reduce temperature disper of the gate phase.It should have a static
capacitance tolerance of ± 10% or Ic and a temperature coefficient of ± 30ppm / °C ( – 55°C to + 125°C) A (CG).
•Control pin logic
Pin
REC / PB setting switch RECH (19pin / 21pin)
Output select switch
CTL (21pin / 23pin)
Chroma killer switch
BWL (17pin / 18pin)
Fig. 7
Low
PB
PAL
Chroma killer
High (Open)
REC
SECAM
NORMAL
(BA7207AS / BA7207AK)
14
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