TDA4570 Datasheet, PDF (6/9 Pages) NXP Semiconductors – NTSC decoder

Philips Semiconductors
NTSC decoder
Product specification
TDA4570
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
Sandcastle pulse detector (note 2)
Input voltage level (pin 15)
to separate vertical and
horizontal blanking pulses
V_15-3
1,3
1,6
1,9
V
required pulse amplitude
V_15-3
2,0
2,5
3,0
V
to separate horizontal
blanking pulse
V_15-3
3,3
3,6
3,9
V
required pulse amplitude
V_15-3
4,1
4,5
4,9
V
to separate burst gating pulse
V_15-3
6,6
7,1
7,6
V
required pulse amplitude
V_15-3
7,7
−
−
V
Input voltage during
horizontal scanning
Input current
V_15-3
−
−I₁₅
−
−
1,1
V
−
100
µA
Notes
1. Expressed as field periods.
2. The sandcastle pulse is compared with three internal threshold levels, which are proportional to the supply voltage.
August 1986
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