BA7071F Datasheet PDF - ROHM Semiconductor
| Part Number | BA7071F | |
| Description | SYNC separator IC with AFC | |
| Manufacturers | ROHM Semiconductor | |
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Multimedia ICs
SYNC separator IC with AFC
BA7071F
The BA7071F contains a video synchronization separation circuit, a vertical video synchronization separation circuit,
a horizontal oscillation circuit, and a phase comparator. It separates and outputs the horizontal and vertical synchro-
nization signals (HD and VD), and the composite synchronization signal (Sync-out) from input video or composite
synchronization signals. The phase difference between HD and VD is guaranteed for both the rising and falling
edges of VD.
•Applications
TVs, VCRs and camcorders
•Features
1) Built in AFC circuit.
2) HD and VD phase difference guaranteed.
3) Wide supply voltage range (3V to 7V).
4) Horizontal free-run frequency does not require ad-
justment.
5) Low external parts count.
6) SOP 8-pin package.
•Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Power supply voltage
Power dissipation
VCC
Pd
8.0
350∗
Operating temperature
Topr
– 20 ~ + 75
Storage temperature
Tstg
– 55 ~ + 125
∗ Reduced by 3.5mW for each increase in Ta of 1°C over 25°C.
Unit
V
mW
°C
°C
•Recommended operating conditions (Ta = 25°C)
Parameter
Power supply voltage
Symbol
VCC
Min.
2.85
Typ.
—
Max.
7.5
Unit
V
1
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Multimedia ICs
•Circuit operation
(1) Synchronization separation circuit
Detects the charging current to a externally-connected
capacitor, and performs synchronization separation.
(2) Horizontal oscillation circuit
When a video signal is input, it is synchronized with
Hsync by the PLL. The horizontal free-running frequen-
cy is determined by external resistor R1.
fH • O = 1.57E6 [kHz]
R1
BA7071F
(3) Vertical synchronization separation circuit
When a video signal is input, synchronization signal
separation is done over the vertical synchronization
pulse interval.
(4) VIN, HD, and VD timing charts
NTSC signal
Odd field (IN)
Vertical synchronization pulse interval
1 / 2H
NTSC signal
Even field (IN)
VD
(OUT)
VIN, VD phase difference
HD, VD phase difference 1
HD, VD phase difference 2
HD
Odd field (OUT)
HD
Even field (OUT)
1. The rise and fall positions for VD are basically the same for both odd and even fields.
2. HD shifts by 1 / 2H during the odd and even field interval.
3. Only the odd field is given for the specification.
Fig. 2
•Attached components
Resistor R1 should have a tolerance of ± 2%, and a
temperature coefficient of 100ppm or lower.
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for BA7071F electronic component. |
| Information | Total 7 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ BA7071F.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| BA7071 | The function is SYNC separator IC with AFC. ROHM Semiconductor | |
| BA7071F | The function is SYNC separator IC with AFC. ROHM Semiconductor | |
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