BU1425AKV Rohm Semiconductor, BU1425AKV Datasheet - Page 25

• Manufacturer Part Number: BU1425AKV
• Description: IC ENCODER NTSC/PAL DGTL VQFP64
• Manufacturer: Rohm Semiconductor
• Type: NTSC/PAL Encoderr

Specifications of BU1425AKV

• Applications: Video
• Voltage - Supply, Analog: 4.5 V ~ 5.5 V
• Voltage - Supply, Digital: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2. Even timing
The BU1425AK / AKV distinguishes whether the condi-
tions of each field (each time that VSY is input) are odd
or otherwise, and internal operation is carried out based
on that recognition after the data is input. As a result,
HSY and VSY are input under input conditions appropri-
Table 18: Even conditions
VSY input L interval
VSY Delay from The
middle of HSY
Multimedia ICs
BCLK = One cycle of internal clock
HSY
VSY
HSY
VSY
Parameter
Symbol
Thvdiff
Tvl
T = 1 / Fhsync 1 / 2
T = 1 / Fhsync
The middle of HSY
BCLK
BCLK
Unit
Expanded view
The middle of HYS
– 128clk
T = 1 / Fhsync 1 / 2
Fig. 19 Even conditions
Thvdiff
Min.
128
Typ.
ate to the specified mode, enabling regulated output for
the first time. Timing that does not match the odd field
conditions is recognized as an even field. In order to pre-
vent malfunctioning of the internal HSY counter, howev-
er, there are regulations which apply to the timing at
which VSYNC is input in even fields.
—
—
HSY Falling edge
– 128clk
Max.
—
Tvl
BU1425AK / BU1425AKV
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