TDA4556 Ver la hoja de datos (PDF) - Philips Electronics
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TDA4556 Datasheet PDF : 11 Pages
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Philips Semiconductors
Multistandard decoder
PARAMETER
Identification part
Switching voltages for chrominance filters
and crystals
at pin 28 (PAL)
at pin 27 (SECAM)
at pin 26 (NTSC 3.58 MHz)
at pin 25 (NTSC 4.43 MHz)
Control voltage OFF state
Control voltage ON state
during scanning; colour OFF
colour ON
Output current
Voltage for forced switching ON
PAL
SECAM
NTSC 3.58 MHz
NTSC 4.43 MHz
Delay time for
restart of scanning
colour ON
colour OFF
SECAM identification (pin 23)
Input voltage for
horizontal identification (H)
vertical identification (V)
combined (H) and (V) identification
Sequence of standard inquiry
PAL-SECAM-NTSC 3.58 MHz-NTSC
4.43 MHz
Reliable SECAM identification by PAL
priority circuit
Scanning time for each standard
Product specification
TDA4557
SYMBOL MIN.
TYP.
MAX. UNIT
V25,26,27,28-9
−
V25,26,27,28-9
2.1
V25,26,27,28-9
5.5
−I25,26,27,28-9
−
V28-9
9
V27-9
9
V26-9
9
V25-9
9
tdS
tdC1
tdC2
−
0.5 V
2.45
2.7 V
5.8
6.2 V
−
3
mA
−
VP
V
−
VP
V
−
VP
V
−
VP
V
2 to 3 vertical periods
2 to 3 vertical periods
0 to 1 vertical periods
V23-9
V23-9
V23-9
0
−
2
V
10
−
VP
V
−
6 (note 2) −
V
tS
4 vertical periods
March 1991
7
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