BA7071 查看數據表（PDF） - ROHM Semiconductor
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BA7071 Datasheet PDF : 7 Pages
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Multimedia ICs
•Measurement circuit (application example)
VIDEO IN
1µF+
C1
1
SYNC
SEPA
HD OUT
2
Vsepa
3
4
VCC
+
0.47µ
R3
VCC = 3V, 10kΩ
VCC = 5V, 18kΩ
+
0.47µ
C3
2200pF
PD
COMP
VCO
220kΩ
R2
BA7071F
VCC
20kΩ R4
SYNC OUT
8
VD OUT
7
VCC
6
+ C4
0.47µF
C5
0.022µF
5
R1 100kΩ
When SYNC SEPA output only is used. HD and VD unused.
VIDEO IN
1µF+
C1
1
SYNC
SEPA
VCC
20kΩ R4
SYNC OUT
8
2
3
4
PD
COMP
Vsepa
VCO
7
VCC
6
+ C4
0.47µF
C5
0.022µF
5
R1 100kΩ
Fig. 1
(1) Connect a 100kΩ resistor between pin 5 and ground.
Leave pins 2, 4 and 7 open.
(2) SYNC OUT (pin 8) has positive output.
(3) The SYNC OUT (pin 8) output rise delay times in relation to the VIDEO IN (pin 1)
input signal Sync fall are as follws:
830 ns (reference value) ,when VCC = 5V
880 ns (reference value) ,when VCC = 3V
(4) The SYNC OUT (pin 8) output fall delay times in relation to the VIDEO IN (pin 1)
input signal Sync rise are as follws:
150 ns (reference value) ,when VCC = 5V
220 ns (reference value) ,when VCC = 3V
4
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