Philips Semiconductors
Product specification
TDA4555
TDA4556
Multistandard decoder
PARAMETER
SYMBOL
MIN.
TYP.
MAX. UNIT
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
V25,26,27,28-9
−
−
0,5
V
V25,26,27,28-9
V25,26,27,28-9
−I25,26,27,28-9
−
−
−
2,45
5,8
−
−
−
3
V
V
Output current
mA
Voltage for forced switching ON
PAL
V28-9
V27-9
V26-9
V25-9
9
9
9
9
−
−
−
−
−
−
−
−
V
V
V
V
SECAM
NTSC 3,58 MHz
NTSC 4,43 MHz
Delay time for
restart of scanning
tdS
2 to 3 vertical periods
2 to 3 vertical periods
0 to 1 vertical periods
colour ON
tdC1
tdC2
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
V23-9
V23-9
V23-9
−
−
2
−
−
V
V
V
10
−
−
6 (note 3)
tS
4 vertical periods
November 1984
7
NXP [ NXP ]
