TDA4655 Ver la hoja de datos (PDF) - Philips Electronics
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TDA4655 Datasheet PDF : 17 Pages
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Philips Semiconductors
Generic multi-standard decoder
Preliminary specification
TDA4655
SYMBOL
PARAMETER
System control processing (note 13)
td
system hold delay
colour killer; colour ON delay
colour OFF delay
ts
scanning time for each system
QUALITY SPECIFICATION URV-4-2-59/601
CONDITIONS MIN. TYP. MAX. UNIT
in event of a signal 2
−
3
field
disappearing for a
periods
short time
switching occurs 2
−
3
field
during field blanking
periods
0
−
1
field
periods
−
4
−
field
periods
Notes to the characteristics
1. Burstkey width for PAL 4.3 µs, for NTSC 3.6 µs.
Burst width for PAL and NTSC 2.25 µs, ratio burst chrominance amplitude 1/2.2.
2. At nominal phase of hue control.
3. V (p-p) of signal divided by 6 times effective noise voltage.
4. At NTSC 3.58 35 mV (p-p).
5. H/2 blanking alternately every second line.
6. These pins are leakage current sensitive. Pin 4 for (B-Y) Channel, pin 10 for (R-Y) Channel.
7. Within 2 dB output voltage deviation.
8. This pin is leakage current sensitive.
9. IC only.
10. Depends also on network on pin 17.
11. Pin 23 for PAL, pin 22 for SECAM, pin 21 for NTSC 3.58 MHz, pin 20 for NTSC 4.43 MHz.
Threshold levels are dependent on supply.
12. The field interval of the sandcastle has to be adapted to the ICs TDA2579B and TDA4690.
The thresholds are independent of supply voltage.
13. System scanning sequence: PAL, SECAM, NTSC 3.5, NTSC 4.4.
June 1993
10
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