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PDF TDA3592A Data sheet ( Hoja de datos )
| Número de pieza | TDA3592A | |
| Descripción | SECAM-PAL transcoder | |
| Fabricantes | NXP Semiconductors | |
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INTEGRATED CIRCUITS
DATA SHEET
TDA3592A
SECAM-PAL transcoder
Product specification
File under Integrated Circuits, IC02
January 1988
1 page  
Philips Semiconductors
SECAM-PAL transcoder
Product specification
TDA3592A
The two colour difference signals are combined again after clamping and then applied to the modulator via de-emphasis,
blanking and reinsertion circuits. The ratio of (R-Y) to (B-Y) at the de-emphasis output (pin 20) is 1,78.
Modulation
A burst signal is reinserted into the combined SECAM signal at the input to the PAL modulator. At this input the phase
relationship for magenta colour is +(R-Y) and −(B-Y). The modulation carriers for the (R-Y) and (B-Y) signals are 90° out
of phase; for a magenta colour the modulated (R-Y) component has the same phase position as the (R-Y) burst. The
(B-Y) burst is modulated 180° out of phase with respect to the (B-Y) component of a magenta-coloured input signal.
Identification SECAM/SECAM
Identification of the SECAM signal is performed using the fact that only SECAM signals have a line-to-line difference in
voltage level. The identification circuit compares the phase of the demodulated voltage difference waveform with the
phase of the flip-flop output. If the phase relationship is not correct, the flip-flop is reset by an extra pulse from the flip-flop
trigger generator. For horizontal identification the phase comparison is performed during the period of pulse ‘B’ (see
Fig.2). When vertical identification is selected, the comparison is performed only during the horizontal scan of the vertical
blanking. The SECAM identification circuits operate when selected by the voltage on pin 4; this may be horizontal, vertical
or combined horizontal and vertical identification, depending on the switching arrangements of pin 4.
These are as follows:
• Horizontal identification preset when V4-1 < 2,9 V;
• Vertical identification preset when V4-1 > 4,1 V;
• Horizontal/vertical combination when sandcastle pulse is present on pin 4.
Information obtained from the identification detector is also used for colour killing and, if required, for switching to PAL.
January 1988
5
5 Page 
Philips Semiconductors
SECAM-PAL transcoder
Product specification
TDA3592A
PARAMETER
Phase relationship of modulated
(R-Y) burst to modulated
(B-Y) burst (pin 9)
Amplitude relationship of
modulated (R-Y) burst to
modulated (B-Y) burst (pin 9)
Black level shift as a function of
supply voltage (pin 9)
(R-Y) signal
(B-Y) signal
Oscillator
Oscillator frequency (pin 9)
(set with series capacitor)
Frequency deviation without
spread of external components
(pin 9)
Temperature coefficient of
oscillator frequency (pin 9)
Frequency deviation for change
of VP from 9,0 to 13,2 V
DC voltage (pin 8)
Input resistance (pin 8)
DC voltage (pin 10)
Input resistance (pin 10)
PAL matrix
Input resistance (pin 11)
Input resistance (pin 12)
Output resistance (pin 14)
(SECAM/SECAM)
Internal emitter follower load
resistance (pin 14)
External load resistor (pin 14)
DC voltage (pin 11)
DC voltage (pin 12)
DC voltage (pin 14)
DC voltage (pin 14)
CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
87 90
93 deg
−1,5 0
+1,5 dB
− −1,5 − kHz/V
− 1,0
− kHz/V
fOSC
−
4,433619 −
MHz
∆fOSC
∆fOSC
V8
R8
V10
R10
R11
R12
R14
SECAM mode
SECAM mode
and
line blanking
RINT(14)
RL(14)
V11
V12
V14
V14
−−
− −2
−−
− 4,7
−1
− 4,4
−2
700 900
700 900
− 40
−7
2,4 −
− 5,0
− 5,0
− 6,2
− 4,9
±150 Hz
−3 Hz/°C
150 Hz
−V
− kΩ
−V
− kΩ
1100 Ω
1100 Ω
−Ω
− kΩ
− kΩ
−V
−V
−V
−V
January 1988
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet TDA3592A.PDF ] | |
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