Objective specification
File under Integrated Circuits, IC02
Philips Semiconductors
January 1995
Page 2
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
processor
FEATURES
• Multistandard vision IF circuit (positive and
negative modulation)
• Video identification circuit in the IF circuit which is
independent of the synchronization for stable On Screen
Display (OSD) under ‘no-signal’ conditions
• Source selection with 2 Colour Video Blanking
Synchronization (CVBS) inputs and a Y/C (or extra
CVBS) input
• Output signals of the video switch circuit for the teletext
decoder and a Picture-In-Picture (PIP) processor
• Integrated chrominance trap and bandpass filters
(automatically calibrated)
• Integrated luminance delay line
• Asymmetrical peaking in the luminance channel with a
(defeatable) noise coring function
• PAL/NTSC colour decoder with automatic search
system
• Easy interfacing with the TDA8395 (SECAM decoder)
for multistandard applications
• RGB control circuit with black-current stabilization and
white point adjustment; to obtain a good grey scale
tracking the black-current ratio of the 3 guns depends on
the white point adjustment
• Linear RGB inputs and fast blanking
• Horizontal synchronization with two control loops and
alignment-free horizontal oscillator
• Vertical count-down circuit
• Geometry correction by means of modulation of the
vertical and EW drive
2
C-bus control of various functions
• I
• Low dissipation (850 mW)
• Small amount of peripheral components compared with
competition ICs
• Only one adjustment (vision IF demodulator)
• Y, U and V inputs and outputs.
TDA8366
GENERAL DESCRIPTION
The TDA8366 is an I
processor. The circuit has been designed for use with the
baseband chrominance delay line TDA4665 and for
DC-coupled vertical and East-West (EW) output stages.
The device can process both CVBS and Y/C input signals
and has a linear RGB-input with fast blanking.
The peaking circuit generates asymmetrical overshoots
(the amplitude of the ‘black’ overshoots is approximately
2 times higher as the one of the ‘white’ overshoots) and
contains a (defeatable) coring function.
The RGB control circuit contains a black-current stabilizer
circuit with internal clamp capacitors. The white point of the
picture tube is adjusted via the I
The deflection control circuit provides a drive pulse for the
horizontal output stage, a differential sawtooth current for
the vertical output stage and an East-West drive current for
the East-West output stage.These signals can be
manipulated for geometry correction of the picture.
The supply voltage for the IC is 8 V. The IC is available in
an SDIP package with 52 pins and in a QFP package with
64 pins (see Chapter “Ordering information”).
The pin numbers indicated in this document are
referenced to the SDIP52; SOT247-1 package; unless
otherwise indicated.
The pin numbers mentioned in the rest of this document are referenced to the SDIP52 (SOT247-1) package.
January 19956
Page 7
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
processor
handbook, halfpage
DEC
CHROMA
CVBS
CVBS
LUMOUT
IFDEM1
IFDEM2
DEC
CVBS/Y
DEC
RGBIN
LUMIN
1
2
3
DIG
4
IFVO
SCL
5
6
SDA
7
BG
8
9
V
10
P1
11
INT
12
GND1
PIPO
1340
14
FT
15
EXT
16
BLKIN
17
BO
18
GO
19
RO
20
BCLIN
21
RI
22
GI
23
BI
24
25
26
TDA8366
MLA737 - 1
52
51
50
49
48
47
46
45
44
43
42
41
39
38
37
36
35
34
33
32
31
30
29
28
27
AGCOUT
DEC
AGC
I
ref
VSC
EHTO
IFIN2
IFIN1
VDR
(neg)
VDR
(pos)
EWD
GND2
PH1LF
PH2LF
FBI
HOUT
SCO
CVBS/TXT
V
P2
DET
XTAL2
XTAL1
SEC
ref
RYI
BYI
RYO
BYO
TDA8366
Fig.2 Pin configuration (SDIP52).
January 19957
Page 8
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
processor
handbook, full pagewidth
VDR
(neg)
IFIN1
IFIN2
EHTO
VSC
I
DEC
AGC
AGCOUT
n.c.
n.c.
IFDEM1
IFDEM2
DEC
DIG
IFVO
ref
(pos)
VDR
EWD
GND4
64
63
62
1
2
3
4
5
6
7
8
9
10
11
12
13
14
GND3
61
PH1LF
60
TDA8366H
PH2LF
59
FBI
58
HOUT
57
SCO
56
P2
V
CVBS/TXT
55
54
n.c.
53
DET
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
n.c.
XTAL2
XTAL1
SEC
ref
RYI
BYI
RYO
BYO
LUMOUT
LUMIN
n.c.
RGBIN
BI
GI
TDA8366
n.c.
15
SCL
16
SDA
17
DEC
BG
n.c.
18
19
20
21
CVBS/Y
CHROMA
22
P1
V
24
EXT
CVBS
25
GND1
23
P3
V
Fig.3 Pin configuration (QFP64).
January 19958
26
GND2
27
PIPO
28
FT
DEC
29
INT
CVBS
30
BLKIN
31
BO
32
GO
37
36
35
34
33
MLC756
RI
n.c.
BCLIN
n.c.
RO
Page 9
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
processor
FUNCTIONAL DESCRIPTION
Vision IF amplifier
The IF-amplifier contains 3 AC-coupled control stages with
a total gain control range which is in excess of 66 dB. The
sensitivity of the circuit is comparable with that of modern
IF-ICs. The reference carrier for the video demodulator is
obtained by means of passive regeneration of the picture
carrier. The external reference tuned circuit is the only
remaining adjustment of the IC.
The polarity of the demodulator can be switched via the
2
I
C-bus in such a way that the circuit is suitable for both
positive and negative modulated signals.
The AFC-circuit is driven with the same reference signal as
the video demodulator. To avoid that the video content
disturbs the AFC operation a sample-and-hold circuit is
applied for signals with negative modulation. The capacitor
for this function is internal. The AFC information is supplied
to the tuning system via the I2C-bus.
The AGC-detector operates on top-sync or top white-level
depending on the polarity of the demodulator. The
demodulation polarity is switched via the I2C-bus. The
AGC detector time-constant capacitor is connected
externally (this mainly because of the flexibility of the
application). The time-constant of the AGC system during
positive modulation is rather long to avoid visible variations
of the signal amplitude. To obtain an acceptable speed of
the AGC system a circuit has been included which detects
whether the AGC detector is activated every frame period.
When during 3 frame periods no action is detected the
speed of the system is increased.
The circuit contains a video identification circuit which is
independent of the synchronization circuit. Therefore
search tuning is possible when the display section of the
receiver is used as a monitor. The identification output is
supplied to the tuning system via the I2C-bus. The
information of this identification circuit can also be used to
switch the phase-1 (ϕ1) loop to a low gain when no signal
is received so that a stable OSD display is obtained. The
coupling of the video identification circuit with the ϕ1loop
can be switched on and off via the I2C-bus.
TDA8366
Synchronization circuit
The sync separator is preceded by a controlled amplifier
which adjusts the sync pulse amplitude to a fixed level.
These pulses are fed to the slicing stage which is operating
at 50% of the amplitude.
The separated sync pulses are fed to the first phase
detector and to the coincidence detector. This coincidence
detector is only used to detect whether the line oscillator is
synchronized and not for transmitter identification. The first
Phase-Locked Loop (PLL) has a very high-statical
steepness so that the phase of the picture is independent
of the line frequency.
The line oscillator is running at twice the line frequency.
The oscillator capacitor is internal. Because of the spreads
of internal components an automatic adjustment circuit
has been added to the IC. It compares the oscillator
frequency with that of the crystal oscillator in the colour
decoder.
To protect the horizontal output transistor the horizontal
drive is switched-off when a power-on-reset is detected.
The frequency of the oscillator is calibrated again when all
subaddress bytes have been sent. When the oscillator has
the right frequency the calibration stops and the horizontal
drive is switched-on again via the soft start procedure
(standby bit in normal mode). When the IC is switched-on
the same procedure is followed.
When the coincidence detector indicates an out-of-lock
situation the calibration procedure is repeated.
The circuit has a second control loop to generate the drive
pulses for the horizontal driver stage. During the start-up
procedure the duty cycle of the horizontal output pulse
increases from 0 to 50% in approximately 100 lines.
The vertical sawtooth generator drives the vertical output
and EW correction drive circuits. The geometry processing
circuits provide control of horizontal shift, EW width, EW
parabola/width ratio, EW corner/parabola ratio, trapezium
correction, vertical shift, vertical slope, vertical amplitude,
and the S-correction. All these controls can be set via the
2
C-bus. The geometry processor has a differential current
I
January 19959
Page 10
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
processor
output for the vertical drive signal and a single-ended
output for the EW drive. Both the vertical drive and the EW
drive outputs can be modulated for EHT compensation.
The EHT compensation pin is also used for overvoltage
protection.
The geometry processor also offers the possibilities for
vertical compression (for display of 16 : 9 pictures on a
4 : 3 screen) and vertical expansion (for display of
4 : 3 pictures on a 16 : 9 screen with full picture width, or
for display of ‘letter-box’ transmissions on a 4 : 3 screen
with full picture height). For the expand mode it is possible
to shift the picture vertically (only one fixed position).
Also the de-interlace of the vertical output can be set via
the I2C-bus.
To avoid damage of the picture tube when the vertical
deflection fails the guard output current of the TDA8350
can be supplied to the sandcastle output. When a failure is
detected the RGB-outputs are blanked and a bit is set
(NDF) in the status byte of the I2C-bus. When no vertical
deflection output stage is connected this guard circuit will
also blank the output signals. This can be overruled by
means of the EVG bit of subaddress 0A (see Table 1).
TDA8366
Video switches
The circuit has two CVBS inputs and an Super-Video
Home System (S-VHS) input. The input can be chosen by
2
the I
C-bus. The input selector also has a position in which
CVBS
S-VHS input. When the input selector is in this position it
switches to the S-VHS input if the S-VHS detector detects
sync pulses on the S-VHS luminance input. The S-VHS
detector output can be read by the I2C-bus. When the
S-VHS option is not used the luminance input can be used
as a second input for external CVBS signals. The choice is
made via the CVS-bit (see Table 1).
The video switch circuit has two outputs which can be
programmed in a different way. The input signal for the
decoder is also available on the TXT output. Therefore this
signal can be used to drive the teletext decoder and the
SECAM add-on decoder. The signal on the PIP output can
be chosen independent of the TXT output. If S-VHS is
selected for one of the outputs the luminance and
chrominance signals are added so that a CVBS signal is
obtained again.
Colour decoder
is processed, unless there is a signal on the
EXT
Integrated video filters
The circuit contains a chrominance bandpass and trap
circuit. The chrominance trap filter in the luminance path is
designed for a symmetrical step response behaviour. The
filters are realized by means of gyrator circuits and they
are automatically tuned by comparing the tuning frequency
with the crystal frequency of the decoder. The luminance
delay line and the delay for the peaking circuit are also
realized by means of gyrator circuits.
It is possible to connect a Colour Transient Improvement
(CTI) or Picture Signal Improvement (PSI) IC to the
TDA8366. Therefore the luminance signal which has
passed the filter and delay line circuit is externally
available. The output signal of the transient improvement
circuit must be supplied to the luminance input circuit.
When the CTI function is not required the two pins must be
AC-coupled.
The colour decoder contains an alignment-free crystal
oscillator, a killer circuit and the colour difference
demodulators. The 90° phase shift for the reference signal
is made internally. The demodulation angle and gain ratio
for the colour difference signals for PAL and NTSC are
adapted to the standard.
The colour decoder is very flexible. Together with the
SECAM decoder TDA8395 an automatic multistandard
decoder can be designed.
Which standard the IC can decode depends on the
external crystals. If a 4.4 MHz and a 3.5 MHz crystal are
used PAL 4.4, NTSC 4.4, NTSC 3.5 and PAL 3.5 can be
decoded. If two 3.5 MHz crystals are used PAL N and M
can be decoded. If one crystal is connected only
PAL/NTSC 4.4 or PAL/NTSC 3.5 can be decoded. The
crystal frequency of the decoder is used to tune the line
oscillator. Therefore the value of the crystal frequency
must be given to the IC via the I
2
C-bus.
January 199510
Page 11
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
processor
RGB output circuit and black-current stabilization
The colour-difference signals are matrixed with the
luminance signal to obtain the RGB-signals. For the
RGB-inputs linear amplifiers have been chosen so that the
circuit is suited for signals coming from the SCART
connector. The contrast and brightness control operate on
internal and external signals.
The output signal has an amplitude of approximately 2 V
black-to-white at nominal input signals and nominal
settings of the controls.
The black current stabilization is realized by means of a
feedback from the video output amplifiers to the RGB
control circuit. The ‘black current’ of the 3 guns of the
picture tube is internally measured and stabilized. The
black level control is active during 4 lines at the end of the
vertical blanking. During the first line the leakage current is
measured and the following 3 lines the 3 guns are
adjusted to the required level. The maximum acceptable
leakage current is ±100 µA. The nominal value of the
‘black current’ is 10 µA. The ratio of the currents for the
various guns automatically tracks with the white point
adjustment so that the back-ground colour is the same as
the adjusted white point.
TDA8366
visible on the screen. As soon as the current supplied to
the measuring input exceeds a value of 190 µA the
stabilization circuit is activated. After a waiting time of
approximately 0.8 s the blanking and the beam current
limiting input pin are released. The remaining switch-on
behaviour of the picture is determined by the external time
constant of the beam current limiting network.
2
C-BUS SPECIFICATION
I
handbook, halfpage
X =don’t care.
Valid subaddresses: 00 to 13; subaddress FE is reserved
for test purposes. Auto-increment mode is available for
subaddresses.
A6A5A4A3A2A1A0
1000101X
R/W
MLA743
Fig.4 Slave address (8A).
The input impedance of the ‘black-current’ measuring pin
is 15 kΩ. Therefore the beam current during scan will
cause the input voltage to exceed the supply voltage. The
internal protection will start conducting so that the
excessive current is bypassed.
When the TV receiver is switched-on the black current
stabilization circuit is not active, the RGB outputs are
blanked and beam current limiting input pin is
short-circuited. Only during the measuring lines will the
outputs supply a voltage of 5 V to the video output stage
so that it can be detected if the picture tube is warming up.
These pulses are switched-on after a waiting time of
approximately 0.5 s. This ensures that the vertical
deflection is activated so that the measuring pulses are not
Start-up procedure
Read the status bytes until POR = 0 and send all
subaddress bytes. The horizontal output signal is
switched-on when the oscillator is calibrated. It is possible
to have the horizontal output signal available before
calibration. Then the SFM bit must be set to logic 0.
Each time before the data in the IC is refreshed, the status
bytes must be read. If POR = 1, the procedure mentioned
above must be carried out to restart the IC.
When this procedure is not followed the horizontal
frequency may be incorrect after power-up or after a
power dip.
January 199511
Page 12
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
TDA8366
processor
Inputs
Table 1 Input status bits; note 1
FUNCTION
Source select00INAINBINCINDFOAFOBXAXB
Decoder mode01FORF FORSDLSTBPOCCM2CM1CM0
Hue02XXA5A4A3A2A1A0
Horizontal shift (HS)03XXA5A4A3A2A1A0
EW width (EW)04XXA5A4A3A2A1A0
EW parabola/width (PW)05XXA5A4A3A2A1A0
EW corner parabola (CP)06XXA5A4A3A2A1A0
EW trapezium (TC)07XXA5A4A3A2A1A0
Vertical slope (VS)08NCINXA5A4A3A2A1A0
Vertical amplitude (VA)09VIDLBMA5A4A3A2A1A0
S-correction (SC)0AHCOEVGA5A4A3A2A1A0
Vertical shift (VSH)0BSBLPRDA5A4A3A2A1A0
White point R0CEXPCLA5A4A3A2A1A0
White point G0DSFMCVSA5A4A3A2A1A0
White point B0EMATPHLA5A4A3A2A1A0
Peaking0FYD3YD2YD1YD0A3A2A1A0
Brightness10RBLCORA5A4A3A2A1A0
Saturation11IE1XA5A4A3A2A1A0
Contrast12AFWIFSA5A4A3A2A1A0
AGC take-over13MODVSWA5A4A3A2A1A0
1. For an equal delay of the luminance and chrominance
signal the delay must be set at a value of 160 ns. This
is only valid for a CVBS signal without group
delay distortions.
1. All pins are protected against ESD by means of internal clamping diodes.
2. Human Body Model (HBM): R = 1.5 kΩ; C = 100 pF.
3. Machine Model (MM): R = 0 Ω; C = 200 pF.
THERMAL CHARACTERISTICS
SYMBOLPARAMETERVALUEUNIT
R
th j-a
thermal resistance from junction to ambient in free air
SDIP5240K/W
QFP6450K/W
QUALITY SPECIFICATION
In accordance with
“SNW-FQ-611E”
. The number of the
quality specification can be found in the
Reference Handbook”
. The handbook can be ordered
using the code 9398 510 63011.
Latch-up
• I
• I
≥ 100 mA or ≥1.5V
trigger
≤−100 mA or ≤−0.5V
trigger
DD(max)
DD(max)
.
“Quality
Following pins do not meet the above specification:
Pin 7: −90 mA
Pin 17: 90 mA
Pin 18: 90 mA
Pin 19: 90 mA
Pin 24: −90 mA
Pin 34: 60 mA
Pin 49: −90 mA
Pin 50: ±90 mA.
January 199516
Page 17
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
TDA8366
processor
CHARACTERISTICS
V
=8V; T
P
SYMBOLPARAMETERCONDITIONSMIN.TYP.MAX.UNIT
Supplies
M
AIN SUPPLY (PIN 10)
V
P1
I
P1
P
tot
HORIZONTAL OSCILLATOR SUPPLY (PIN 35)
V
P2
I
P2
IF circuit
V
ISION IF AMPLIFIER INPUTS (PINS 46 AND 47)
V
i(rms)
R
I
C
I
G
cr
V
i max(rms)
VIDEO AMPLIFIER OUTPUT (PIN 4); note 3
V
o
V
4
V
4
∆V
4
Z
o
I
bias
I
source(max)
Bbandwidth of demodulated
G
diff
ϕ
diff
NL
vid
V
th
V
ins
=25°C; unless otherwise specified.
amb
supply voltage7.28.08.8V
supply current−100−mA
total power dissipation−850−W
supply voltage7.28.08.8V
supply current−6−mA
input sensitivity (RMS value)note 1
= 38.90 MHz−70100µV
f
i
= 45.75 MHz−70100µV
f
i
= 58.75 MHz−70100µV
f
i
input resistance (differential)note 2−2−kΩ
input capacitance (differential)note 2−3−pF
gain control range64−−dB
maximum input signal
100150−mV
(RMS value)
zero signal output levelnegative modulation; note 4−4.7−V
positive modulation; note 4−2.0−V
top sync levelnegative modulation1.92.02.1V
white levelpositive modulation−4.5−V
difference in amplitude between
−015%
negative and positive
modulation
video output impedance−50−Ω
internal bias current of NPN
1.0−−mA
emitter follower output transistor
maximum source current−−5mA
at −3dB69−MHz
output signal
differential gainnote 5−25%
differential phasenotes 5 and 6−−5deg
video non-linearitynote 7−−5%
white spot threshold level−5.0−V
white spot insertion level−3.3−V
150−−µA
PAL/NTSC identification circuit
during SECAM
saturation control range63 steps; seeFig.752−−dB
contrast control range63 steps−20−dB
tracking between the three
see Fig.8−−0.5dB
channels over a control range of
10 dB
brightness control range63 steps; see Fig.9−±0.7−V
output signal amplitude
(peak-to-peak value)
at nominal luminance input
signal, nominal contrast and
tbf2.0tbfV
white-point adjustment;
note 15
at maximum white point
−3.0−V
setting
maximum signal amplitude
(black-to-white)
note 28−2.6−V
at maximum white point
−3.6−V
setting
output signal amplitude for the
‘red’ channel (peak-to-peak
value)
at nominal settings for
contrast and saturation
control and no luminance
tbf2.1tbfV
signal to the input (R−Y, PAL)
blanking level at the RGB
0.70.80.9V
outputs
internal bias current of NPN
−1.5−mA
emitter follower output transistor
available output current−5−mA
output impedance−150−Ω
January 199527
Page 28
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
TDA8366
processor
SYMBOLPARAMETERCONDITIONSMIN.TYP.MAX.UNIT
RGB AMPLIFIERS (CONTINUED)
CR
bl
control range of the
black-current stabilization
V
bl
black level shift with picture
content
V
o
output voltage of the 4-L pulse
after switch-on
∆bl/∆Tvariation of black level with
temperature
∆blrelative variation in black level
between the three channels
during variations of
supply voltage (±10%)nominal controls−−tbfmV
saturation (50 dB)nominal contrast−−tbfmV
contrast (20 dB)nominal saturation−−tbfmV
brightness (±0.5 V)nominal controls−−tbfmV
temperature (range 40 °C)−−tbfmV
S/Nsignal-to-noise ratio of the
output signals
V
res(p-p)
residual voltage at the RGB
outputs (peak-to-peak value)
Bbandwidth of output signalsRGB input; at −3dB8−−MHz
HITE-POINT ADJUSTMENT
W
I2C-bus setting for nominal gain HEX code−20H−
G
inc(max)
G
dec(max)
maximum increase of the gainHEX code 3FH405060%
maximum decrease of the gainHEX code 00H405060%
BLACK-CURRENT STABILIZATION (PIN 16); note 30
I
bias
bias current for the picture tube
cathode
I
leak
I
scan(max)
acceptable leakage current−100−µA
maximum current during scan−0.3−mA
nominal brightness and
−−±1V
white-point adjustment (with
respect to the measuring
pulse); V
blk
= 2.5 V
note 6−−20mV
−4.2−V
note 6−1.0−mV/K
note 6
RGB input; note 2960−−dB
CVBS input; note 2950−−dB
at f
at 2f
osc
plus higher
osc
−−15mV
−−15mV
harmonics in RGB outputs
CVBS input; at −3 dB;
= 3.58 MHz
f
osc
CVBS input; at −3 dB;
= 4.43 MHz
f
osc
−2.8−MHz
−3.5−MHz
S-VHS input; at −3dB5−−MHz
−10−µA
January 199528
Page 29
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
TDA8366
processor
SYMBOLPARAMETERCONDITIONSMIN.TYP.MAX.UNIT
EAM CURRENT LIMITING (PIN 20); note 28
B
V
CR
contrast reduction starting
voltage
V
diffCR
voltage difference for full
contrast reduction
V
BR
brightness reduction starting
voltage
V
diffBR
voltage difference for full
brightness reduction
V
bias
I
ch(int)
I
disch
internal bias voltage−4.5−V
internal charge current−40−µA
discharge current due to
‘peak-white limiting’
Notes
1. On set AGC.
2. This parameter is not tested during production and is just given as application information for the designer of the
television receiver.
3. Measured at 10 mV (RMS) top sync input signal.
4. So called projected zero point, i.e. with switched demodulator.
5. Measured in accordance with the test line given in Fig.10. For the differential phase test the peak white setting is
reduced to 87%.
a) The differential gain is expressed as a percentage of the difference in peak amplitudes between the largest and
smallest value relative to the subcarrier amplitude at blanking level.
b) The phase difference is defined as the difference in degrees between the largest and smallest phase angle.
6. This parameter is not tested during production but is guaranteed by the design and qualified by means of matrix
batches which are made in the pilot production period.
7. This figure is valid for the complete video signal amplitude (peak white-to-black), see Fig.11.
8. The test set-up and input conditions are given in Fig.12. The figures are measured with an input signal of
10 mV RMS.
9. Measured with a source impedance of 75 Ω, where:
10. To obtain a good noise immunity of the AGC circuit the AGC detector is gated during the sync pulse. This gating is
switched-off during the vertical retrace to avoid disturbances of the signal amplitude due to phase errors of the
incoming video signal which are caused by the head-switching of VCRs.
January 199529
V
(black-to-white)
O
B = 5 MHz()
Page 30
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
TDA8366
processor
11. The AFC slope is directly related to the Q-factor of the demodulator tuned circuit. The given AFC steepness is
obtained with a Q-factor of 60. The AFC off-set is tested with a double sideband input signal and with the reference
tuned circuit tuned to minimum AGC voltage (optimum tuning for the demodulator).
2
The tuning information is supplied to the tuning system via the I
The first bit indicates whether the tuning is within the given window. The second bit indicates the direction of the
tuning. Bit indications:
a) AFA = 1; tuning inside window.
b) AFA = 0; tuning outside window.
c) AFB = 1; tuning too high.
d) AFB = 0; tuning too low.
To improve the speed of search tuning systems the AFC window can be increased to about 240 kHz. The width of
the window can be set by means of the AFW bit in subaddress 03.
12. Signal with negative-going sync. Amplitude includes sync pulse amplitude.
13. This parameter is measured at nominal settings of the various controls.
14. Indicated is a signal for a colour bar with 75% saturation (chroma : burst ratio = 2.2 : 1).
15. Nominal contrast is specified with the DAC in position 20H. Nominal saturation as maximum −10 dB. In the nominal
brightness setting the black level at the outputs is identical to the level of the black-current measuring pulses.
16. The −3 dB bandwidth of the circuit can be calculated by means of the following equation:
1
f
f
=
3dB–
17. Valid for a signal amplitude on the Y-input of 0.7 V black-to-white (100 IRE) with a rise time (10% to 90%) of 70 ns
and the video switch in the Y/C mode. During production the peaking function is not tested by measuring the
overshoots but by measuring the frequency response of the Y output.
18. The slicing level is independent of sync pulse amplitude. The given percentage is the distance between the slicing
level and the black level (back porch).
19. To obtain a good performance for both weak signal and VCR playback the time constant of the first control loop is
switched depending on the input signal condition and the condition of the I
noise detector and the time constant is switched to ‘slow’ when too much noise is present in the signal. In the ‘fast’
mode during the vertical retrace time the phase detector current is increased 50% so that phase errors due to
head-switching of the VCR are corrected as soon as possible. Switching between the two modes can be
automatically or overruled by the I2C-bus.
The circuit contains a video identification circuit which is independent of first loop. This identification circuit can be
used to close or open the first control loop when a video signal is present or not present on the input. This enables
a stable On Screen Display (OSD) when just noise is present at the input. The coupling of the video identification
circuit with the first loop can be defeated via the I2C-bus.
When the horizontal PLL is set to the ‘slow’ mode (via I2C-bus bits FOA and FOB) or during weak signal conditions
in the ‘automatic’ mode the phase detector is gated to obtain a good noise immunity. The width of the gating pulse
is 5.7 µs.
The output current of the phase detector in the various conditions are shown in Table 42.
20. During the start-up period of the oscillator the duty factor of the output pulse rises gradually from 0% to 50% (time
approximately 100 lines).
21. The start-up frequency depends on the SFM bit in the I2C-bus protocol. When SFM = 0 the frequency starts at a high
(non calibrated) value. When SFM = 1 the output signal will only be available after calibration.
1
–
osc
------- -
2Q
C-bus. Two bits have been reserved for this function.
2
C-bus. Therefore the circuit contains a
January 199530
Page 31
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
TDA8366
processor
22. The timing pulses for the vertical ramp generator are obtained from the horizontal oscillator via a divider circuit. This
divider circuit has 3 modes of operation:
a) Search mode ‘large window’.
This mode is switched on when the circuit is not synchronized or when a non-standard signal (number of lines per
frame in the 50 Hz mode is between 311 and 314 and in the 60 Hz mode between 261 and 264). In the search mode
the divider can be triggered between line 244 and line 361 (approximately 45 to 64.5 Hz).
b) Standard mode ‘narrow window’.
This mode is switched on when more than 15 succeeding vertical sync pulses are detected in the narrow window.
When the circuit is in the standard mode and a vertical sync pulse is missing the retrace of the vertical ramp generator
is started at the end of the window. Consequently, the disturbance of the picture is very small. The circuit will switch
back to the search window when, for 6 successive vertical periods, no sync pulses are found within the window.
c) Standard TV-norm (divider ratio 525 (60 Hz) or 625 (50 Hz).
When the system is switched to the narrow window it is checked whether the incoming vertical sync pulses are in
accordance with the TV-norm. When 15 standard TV-norm pulses are counted the divider system is switched to the
standard divider ratio mode. In this mode the divider is always reset at the standard value even if the vertical sync
pulse is missing.
When 3 vertical sync pulses are missed the system switches back to the narrow window and when also in this
window no sync pulses are found (condition 3 missing pulses) the system switches over to the search window.
The vertical divider needs some waiting time during channel-switching of the tuner. When a fast reaction of the
divider is required during channel-switching the system can be forced to the search window by means of the NCIN bit
in subaddress 08.
23. Conditions: frequency is 50 Hz; normal mode; VS = 1F.
24. At a chrominance input voltage of 660 mV (p-p) (colour bar with 75% saturation i.e. burst signal amplitude
300 mV (p-p)) the dynamic range of the ACC is +6 and −20 dB.
25. All frequency variations are referenced to 3.58 or 4.43 MHz carrier frequency.
All oscillator specifications are measured with the Philips crystal series 9922 520.
If the spurious response of the 4.43 MHz crystal is lower than −1 dB with respect to the fundamental frequency for a
damping resistance of 1 kΩ, oscillation at the fundamental frequency is guaranteed.
The spurious response of the 3.58 MHz crystal must be lower than −1 dB with respect to the fundamental frequency
for a damping resistance of 1.5 kΩ.
The catching and detuning range are measured for nominal crystal parameters. These are:
a) Load resonance frequency f0= 4.433619 or 3.579545 MHz; CL= 20 pF.
b) Motional capacitance C1= 20.6 fF (4.43 MHz crystal) or 14.7 fF (3.58 MHz crystal).
c) Parallel capacitance C0= 5.5 pF (4.43 MHz crystal) or 4.5 pF (3.58 MHz crystal).
The actual load capacitance in the application should be CL= 18 pF to account for parasitic capacitances on and
off chip.
Philips Components has developed a special crystal which is tuned to the correct frequency in an application without
series capacitance (code number 9922 520 0038X; see Table 43). This has the advantage that the tuning (catching)
range is increased with approximately 50% without negative effects on spurious responses. When the catching range
of 300 Hz is considered too low this special crystal is a suitable alternative.
The free-running frequency of the oscillator can be checked by opening the colour PLL via the I2C-bus. In that
condition the colour killer is not active so that the frequency off-set is visible on the screen. When two crystals are
connected to the IC the circuit must be forced to one of the crystals during this test to prevent the oscillator switching
continuously between the two frequencies.
January 199531
Page 32
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
TDA8366
processor
26. The (R−Y) and(B−Y) signals are demodulated with a phase difference of the reference carrier of 90° and a gain ratio
BY–()
-------------------- RY–()
27. This parameter indicates the bandwidth of the complete chrominance circuit including the chrominance bandpass
filter. The bandwidth of the low-pass filter of the demodulator is approximately 1 MHz.
28. At nominal setting of the gain control. When this amplitude is exceeded the peak-white limiting circuit will reduce the
contrast. The control voltage is generated via the external capacitor connected to the beam-current limiting input.
29. Signal-to-noise ratio (S/N) is specified as peak-to-peak signal with respect to RMS noise (bandwidth 5 MHz).
30. This is a current input. The indicated value of the nominal bias current is obtained at the nominal setting of the gain
(white point) control. The actual value of the bias current depends on the gain control setting of each channel. As a
result the ‘black-current’ of each gun is adapted to the white point setting so that the back-ground colour will follow
the white point adjustment.
Table 42 Output current of the phase detector in the various conditions
VIDPOCFOAFOBIDENTCOINNOISESCANV-RETR GATINGMODE
−000yesyesyes3030yesauto
−000yesno−180270noauto
−001yesyes−3030yesslow
−001yesno−180270noslow
−01−yes−−180270nofast00−−no−−66noOSD
−1−−−−−−−−off
1.78=
. The matrixing to the required signals is achieved in the control part.
In order to obtain correct tracking of the vertical and
horizontal EHT-correction, the EW output stage should be
dimensioned as illustrated in Fig.14.
Resistor REW determines the gain of the EW output stage.
Resistor Rc determines the reference current for both the
vertical sawtooth generator and the geometry processor.
January 199536
TDA4661
The preferred value of R
is 39 kΩ which results in a
c
reference current of 100 µA (V
The value of R
EW
R
c
R
Example: With V
EW
V
×=
---------------------- 18 V
must be:
scan
×
ref
= 3.9 V; Rc=39kΩ and V
ref
then REW=68kΩ.
= 3.9 V).
ref
MLA746 - 1
scan
= 120 V
Page 37
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
processor
handbook, full pagewidth
TDA8366
43
EWD
4950
V
ref
R
39 kΩ
(2%)
I
c
ref
C
saw
100 nF
(5%)
R
ew
EW output
stage
V
DD
HORIZONTAL
DEFLECTION
STAGE
DIODE
MODULATOR
MLA744 - 1
V
V
TDA8366
scan
EW
Fig.14 East-West output stage.
VA = 0, 31H and 63H; VSH = 31H; SC = 0.
Fig.15 Control range of vertical amplitude.
January 199537
VS = 0, 31H and 63H; VA = 31H; VHS = 31H; SC = 0.
Fig.16 Control range of vertical slope.
Page 38
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
processor
TDA8366
VSH = 0, 31H and 63H; VA = 31H; SC = 0.
Fig.17 Control range of vertical shift.
SC = 0, 31H and 63H; VA = 31H; VHS = 31H.
Fig.18 Control range of S-correction.
EW = 0, 31H and 63H; PW = 31H; CP = 31H.
Fig.19 Control range of EW width.
January 199538
PW = 0, 31H and 63H; EW = 31H; CP = 31H.
Fig.20 Control range of EW parabola/width ratio.
Page 39
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
processor
TDA8366
CP = 0, 31H and 63H; EW = 31H; PW = 63H.
Fig.21 Control range of EW corner/parabola ratio.
TC = 0, 31H and 63H; EW = 31H; PW = 31H.
Fig.22 Control range of EW trapezium correction.
January 199539
Page 40
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
processor
Adjustment of geometry control parameters
The deflection processor of the TDA8366 offers nine
control parameters for picture alignment:
• Horizontal picture alignment
– horizontal shift
– EW width
– EW parabola/width
– EW corner/parabola
– EW trapezium correction.
It is important to notice that the TDA8366 is designed for
use with a DC-coupled vertical deflection stage. This is the
reason why a vertical linearity alignment is not necessary
(and therefore not available).
For a particular combination of picture tube type, vertical
output stage and EW output stage it is determined which
are the required values for the settings of S-correction, EW
parabola/width ratio and EW corner/parabola ratio. These
parameters can be preset via the I
any additional adjustment. The rest of the parameters are
preset with the mid-value of their control range (i.e. 1FH),
or with the values obtained by previous TV-set
adjustments.
The vertical shift control is meant for compensation of
off-sets in the external vertical output stage or in the
picture tube. It can be shown that without compensation
these off-sets will result in a certain linearity error,
especially with picture tubes that need large S-correction.
The total linearity error is in first order approximation
proportional to the value of the off-set, and to the square of
the S-correction needed. The necessity to use the vertical
shift alignment depends on the expected off-sets in vertical
output stage and picture tube, on the required value of the
S-correction, and on the demands upon vertical linearity.
2
C-bus, and do not need
TDA8366
For adjustment of the vertical shift and vertical slope
independent of each other, a special service blanking
mode can be entered by setting the SBL bit HIGH. In this
mode the RGB-outputs are blanked during the second half
of the picture. There are 2 different methods for alignment
of the picture in vertical direction. Both methods make use
of the service blanking mode.
The first method is recommended for picture tubes that
have a marking for the middle of the screen. With the
vertical shift control the last line of the visible picture is
positioned exactly in the middle of the screen. After this
adjustment the vertical shift should not be changed. The
top of the picture is placed by adjustment of the vertical
amplitude, and the bottom by adjustment of the vertical
slope.
The second method is recommended for picture tubes that
have no marking for the middle of the screen. For this
method a video signal is required in which the middle of the
picture is indicated (e.g. the white line in the circle test
pattern). With the vertical slope control the beginning of the
blanking is positioned exactly on the middle of the picture.
Then the top and bottom of the picture are placed
symmetrical with respect to the middle of the screen by
adjustment of the vertical amplitude and vertical shift.
After this adjustment the vertical shift has the right setting
and should not be changed.
If the vertical shift alignment is not required VSH should be
set to its mid-value (i.e. VSH = 1F). Then the top of the
picture is placed by adjustment of the vertical amplitude
and the bottom by adjustment of the vertical slope. After
the vertical picture alignment the picture is positioned in
the horizontal direction by adjustment of the EW width and
the horizontal shift. Finally (if necessary) the left- and
right-hand sides of the picture are aligned in parallel by
adjusting the EW trapezium control.
After adjustment of the picture for normal vertical
deflection as described, no additional adjustment is
necessary for the compress and expand mode. If required
a small correction of the picture height can be made by
adjusting the vertical slope. This will not effect the linearity.
Fig.24 Plastic quad flat package; 64 leads (lead length 1.95 mm); body 14 × 20 × 2.8 mm.
January 199542
Page 43
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
processor
SOLDERING
Plastic dual in-line packages
Y DIP OR WAVE
B
The maximum permissible temperature of the solder is
260 °C; this temperature must not be in contact with the
joint for more than 5 s. The total contact time of successive
solder waves must not exceed 5 s.
The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified storage maximum. If the printed-circuit board has
been pre-heated, forced cooling may be necessary
immediately after soldering to keep the temperature within
the permissible limit.
EPAIRING SOLDERED JOINTS
R
Apply a low voltage soldering iron below the seating plane
(or not more than 2 mm above it). If its temperature is
below 300 °C, it must not be in contact for more than 10 s;
if between 300 and 400 °C, for not more than 5 s.
Plastic quad flat-packs
YWAVE
B
During placement and before soldering, the component
must be fixed with a droplet of adhesive. After curing the
adhesive, the component can be soldered. The adhesive
can be applied by screen printing, pin transfer or syringe
dispensing.
Maximum permissible solder temperature is 260 °C, and
maximum duration of package immersion in solder bath is
10 s, if allowed to cool to less than 150 °C within 6 s.
Typical dwell time is 4 s at 250 °C.
TDA8366
A modified wave soldering technique is recommended
using two solder waves (dual-wave), in which a turbulent
wave with high upward pressure is followed by a smooth
laminar wave. Using a mildly-activated flux eliminates the
need for removal of corrosive residues in most
applications.
Y SOLDER PASTE REFLOW
B
Reflow soldering requires the solder paste (a suspension
of fine solder particles, flux and binding agent) to be
applied to the substrate by screen printing, stencilling or
pressure-syringe dispensing before device placement.
Several techniques exist for reflowing; for example,
thermal conduction by heated belt, infrared, and
vapour-phase reflow. Dwell times vary between 50 and
300 s according to method. Typical reflow temperatures
range from 215 to 250 °C.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 min at 45 °C.
EPAIRING SOLDERED JOINTS (BY HAND-HELD SOLDERING
R
IRON OR PULSE
Fix the component by first soldering two, diagonally
opposite, end pins. Apply the heating tool to the flat part of
the pin only. Contact time must be limited to 10 s at up to
300 °C. When using proper tools, all other pins can be
soldered in one operation within 2 to 5 s at between 270
and 320 °C. (Pulse-heated soldering is not recommended
for SO packages.)
For pulse-heated solder tool (resistance) soldering of VSO
packages, solder is applied to the substrate by dipping or
by an extra thick tin/lead plating before package
placement.
-HEATED SOLDER TOOL)
January 199543
Page 44
Philips SemiconductorsObjective specification
I2C-bus controlled PAL/NTSC TV
TDA8366
processor
DEFINITIONS
Data sheet status
Objective specificationThis data sheet contains target or goal specifications for product development.
Preliminary specificationThis data sheet contains preliminary data; supplementary data may be published later.
Product specificationThis data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
PURCHASE OF PHILIPS I
Purchase of Philips I
components in the I2C system provided the system conforms to the I2C specification defined by
Philips. This specification can be ordered using the code 9398 393 40011.
2
C COMPONENTS
2
C components conveys a license under the Philips’ I2C patent to use the
January 199544
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.