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TDA8361 Datasheet(PDF) 10 Page - NXP Semiconductors

Part No. TDA8361
Description  Integrated PAL and PAL/NTSC TV processors
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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 10 page
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March 1994
10
Philips Semiconductors
Objective specification
Integrated PAL and PAL/NTSC TV
processors
TDA8360; TDA8361; TDA8362
The conditions are:
• Signal identified at
fosc = 3.6 MHz; VO = 6 V
• Signal identified at
fosc = 4.4 MHz (or no colour);
VO = 8 V.
This information can be used to
switch the sound bandpass filter and
trap filter.
TDA8361
This IC contains an automatic
PAL/NTSC decoder. The conditions
for connecting the reference crystals
are the same as for the TDA8360.
The decoder can be forced to PAL
when the hue control pin is connected
to the positive supply voltage via a
5k
Ω or 10 kΩ resistor
(approximately). The decoder cannot
be forced to the NTSC standard. It is
also possible to see if a colour signal
is recognized via the saturation pin.
TDA8362
In addition to the possibilities of the
TDA8361, the TDA8362 can
co-operate with the SECAM add-on
decoder TDA8395.
The communication between the two
ICs is achieved via pin 32. The
TDA8362 supplies the reference
signal (4.43 MHz) for the calibration
system of the TDA8395, identification
of the colour standard is via the same
connection. When a SECAM signal is
detected by the TDA8395 the IC will
draw a current of 150
µA. When
TDA8362 has not identified a colour
signal in this condition it will go into
the SECAM mode, that means it will
switch off the R
−Y and B−Y outputs
and increase the voltage level on
pin 32.
This voltage will switch off the
colour-killer in the TDA8395 and
switch on the R
−Y and B−Y outputs of
the TDA8395. Forcing the system to
the SECAM standard can be
achieved by loading pin 32 with a
current of 150
µA. Then the system
manager in the TDA8362 will not
search for PAL or NTSC signals.
Forcing to NTSC is not possible.
For PAL/SECAM applications the
input signal for the TDA8395 can be
obtained from pin 27 (hue control)
when this pin is connected to the
positive supply rail via the 5 k
Ω or
10 k
Ω resistor. An external source
selector is required by the
TDA8395/TDA8362 combination for
PAL/SECAM/NTSC applications.
RGB output circuit
The colour difference signals are
matrixed with the luminance signal to
obtain the RGB signals. Linear
amplifiers have been chosen for the
RGB inputs so that the circuit is
suitable for incoming signals from the
SCART connector. The contrast and
brightness controls operate on
internal and external signals.
The fast blanking pin has a second
detection level at 3.5 V.
When this level is exceeded the
RGB outputs are blanked so that
“On-Screen-Display” signals can be
applied to the outputs.
The output signal has an amplitude of
approximately 4 V, black-to-white,
with nominal input signals and
nominal control settings. The nominal
black level is 1.3 V.



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