tda4855 NXP Semiconductors, tda4855 Datasheet - Page 14

• Manufacturer Part Number: tda4855
• Description: Autosync Deflection Controller Asdc
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1996 Jul 18
V
I
V
Automatic polarity correction for vertical sync
t
t
Video clamping/vertical blanking output [CLBL (pin 16)]
t
V
t
t
TC
V
t
TC
V
TC
I
I
VSYNC
VSYNC(max)
d(VPOL)
clamp(CLBL)
d(clamp)
clamp(max)
blank(CLBL)
sink(CLBL)
load(CLBL)
ERTICAL SYNC OUTPUT AT
VSYNC
clamp(CLBL)
blank(CLBL)
scan(CLBL)
Autosync Deflection Controller (ASDC)
clamp
blank
scan
SYMBOL
output current
internal clamping voltage level
steepness of slopes
maximum width of vertical sync
pulse
delay for changing polarity
width of video clamping pulse
top voltage level of video
clamping pulse
delay between trailing edge of
horizontal sync and start of
video clamping pulse
maximum duration of video
clamping pulse referenced to
end of horizontal sync
temperature coefficient of
V
steepness of slopes for
clamping pulse
top voltage level of vertical
blanking pulse
width of vertical blanking pulse
temperature coefficient of
V
output voltage during vertical
scan
temperature coefficient of
V
internal sink current
external load current
clamp(CLBL)
blank(CLBL)
scan(CLBL)
VSYNC (
PARAMETER
PIN
14)
DURING COMPOSITE SYNC AT
during internal vertical
sync
during internal vertical
sync
measured at V
clamping pulse triggered
on trailing edge of
horizontal sync
measured at V
R
notes 1 and 2
VGA presets active
VGA presets disabled
I
CLBL
L
= 1 M ; C
= 0
14
CONDITIONS
L
CLBL
CLBL
= 20 pF
HSYNC (
= 3 V
= 3 V
4.4
0.3
0.6
4.32
1.7
500
240
0.59
2.4
PIN
0.7
MIN.
15)
4.8
300
0.7
4.75
130
+4
50
1.9
575
300
+2
0.63
1.0
2
TYP.
Preliminary specification
5.2
300
1.8
0.8
5.23
1.0
2.1
650
360
0.67
MAX.
1.35
3.0
TDA4855
mA
V
ns/mA
ms
V
ns
mV/K
ns/V
V
mV/K
V
mV/K
mA
mA
s
s
s
s
s
UNIT