Philips Semiconductors
Product specification
Economy Autosync Deflection Controller
(EASDC)
TDA4858
CHARACTERISTICS
V
CC = 12 V; Tamb = 25 °C; peripheral components in accordance with Fig.1; unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX.
Horizontal sync separator
UNIT
INPUT CHARACTERISTICS FOR DC-COUPLED TTL SIGNALS [HSYNC (PIN 15)]
VDC(HSYNC)
sync input signal voltage
slicing voltage level
1.7
−
−
V
V
1.2
10
10
0.7
−
1.4
−
1.6
500
500
−
tr(HSYNC)
tf(HSYNC)
tW(HSYNC)
IDC(HSYNC)
rise time of sync pulse
fall time of sync pulse
minimum width of sync pulse
input current
ns
ns
µs
µA
µA
−
−
VHSYNC = 0.8 V
HSYNC = 5.5 V
−
−200
10
V
−
−
INPUT CHARACTERISTICS FOR AC-COUPLED VIDEO SIGNALS (SYNC-ON-VIDEO, NEGATIVE SYNC POLARITY)
VAC(HSYNC)
sync amplitude of video input
signal voltage
−
300
−
mV
mV
slicing voltage level
source resistance
90
120
150
(measured from top sync)
RS = 50 Ω
Vclamp(HSYNC)
IC(HSYNC)
top sync clamping voltage level
1.1
1.7
1.28
2.4
1.5
3.4
V
charge current for coupling
capacitor
V
HSYNC > Vclamp(HSYNC)
µA
tHSYNC(min)
RS(max)
minimum width of sync pulse
maximum source resistance
differential input resistance
0.7
−
−
−
µs
Ω
duty factor = 7%
during sync
−
1500
rdiff(HSYNC)
−
80
−
Ω
Automatic polarity correction for horizontal sync
horizontal sync pulse width
related to tH
fH < 45 kHz
fH > 45 kHz
−
−
−
−
20
25
%
%
tP (H)
-------------
tH
tP(H)
delay time for changing polarity
0.3
−
1.8
ms
Vertical sync integrator
tint(V) integration time for generation fH = 31.45 kHz;
7
10
13
µs
µs
µs
of a vertical trigger pulse
IHREF = 1.052 mA
fH = 64 kHz;
IHREF = 2.141 mA
3.9
2.5
5.7
3.8
6.5
4.5
fH = 100 kHz;
IHREF = 3.345 mA
Vertical sync slicer (DC-coupled, TTL compatible) [VSYNC (pin 14)]
VVSYNC
sync input signal voltage
slicing voltage level
input current
1.7
1.2
−
−
−
V
1.4
−
1.6
±10
V
IVSYNC
0 V < VSYNC < 5.5 V
µA
1997 Oct 27
13
NXP [ NXP ]
