STV2246H STMicroelectronics, STV2246H Datasheet - Page 25

• Manufacturer Part Number: STV2246H
• Manufacturer: STMicroelectronics

Specifications of STV2246H

• Lead Free Status / Rohs Status: Compliant

STV224X, STV228X, STV223X - FUNCTIONAL DESCRIPTION
– 3.575611 MHz XTAL specification (PAL M).
– 3.582056 MHz XTAL specification (PAL N).
0° and ± 90° demodulation angles for PAL.
Bus-controlled demodulation angles (0, 90) or (0,
104) are available in NTSC mode.
Bus-controlled Hue adjustment is available in
NTSC mode.
3.5.2.1 NTSC Automatic Flesh Control
Two automatic flesh control characteristics are
available via the bus.The normal flesh control with
±10° correction and a total action range of ±60°
and the wide flesh control with ±20° correction and
a total action range of ±90°.
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Shunt capacitance: C
Serial resistance: R
Mode of operation: serial resonance (without
load capacity),
Motional capacitance: C
Shunt capacitance: C
Serial resistance: R
Mode of operation: serial resonance (without
load capacity),
Motional capacitance: C
Shunt capacitance: C
Serial resistance: R
S
S
S
< 70 Ω.
< 70Ω.
< 70Ω.
P
P
P
< 7 pF,
< 7pF,
< 7pF,
M
M
= 12fF ±2fF,
= 12fF ±2fF,
3.5.3 SECAM Decoder
The following functions are fully-integrated: Killer,
PLL demodulator and De-emphasis functions.
3.5.4 Chroma Standard Identification
R-Y and B-Y outputs are blanked during Color
Search mode. The color is displayed only when
the chroma standard has been identified.
3.5.4.1 Sequential Identification
Three identification sequences:
– XTAL1 (4.43 MHz) mode to identify either PAL or
– XTAL2 (3.58 MHz) mode to identify either PAL or
– SECAM mode (XTAL1 selection).
In 3-crystal applications, the SECAM sequence is
replaced by XTAL3 selection to identify either PAL
or NTSC signals.
3.5.4.2 SECAM Identification
SECAM mode is locked after two identified SE-
CAM sequences.
SECAM mode can be selected in 50 Hz mode on-
ly. PAL/NTSC has priority over SECAM standard.
NTSC.
NTSC.