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GS4911B Datasheet, PDF (33/119 Pages) Gennum Corporation – HD/SD/Graphics Clock and Timing Generator with GENLOCK | |||
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2.3 AC Electrical Characteristics
Table 2-2: AC Electrical Characteristics
VDD = 1.8V, TA = 0°C to 70°C, unless otherwise specified.
Parameter
Symbol
Condition
Min
Typ
Max
Units Notes
System
Reference Detection Time
â
Digital I/O
from when the
â
2
4
frames
â
reference input is
first present
PCLK Output Frequency
â
PCLK Jitter
â
â
PCLK Duty Cycle
â
PCLK1 & PCLK2 Rise/Fall Times
â
15pF load
20% - 80%
â
â
â
PCLK3 Rise/Fall Time
â
20% - 80%
PCLK Outputs Relative Timing
â
Skew
ACLK Frequency
â
(GS4911B only)
ACLK Duty Cycle
â
(GS4911B only)
â
3.375
â
165
MHz
â
SD video standards
â
350
â
XTAL_VDD = 3.3V
ps
1, 2
HD & Graphics
video standards
â
250
â
XTAL_VDD = 3.3V
ps
1, 3
â
40
â
60
%
â
IO_VDD = 1.8V
current drive =
LOW
â
â
1.7
ns
â
IO_VDD = 3.3V
current drive =
LOW
â
â
1.5
ns
â
IO_VDD = 1.8V
current drive =
HIGH
â
â
1.1
ns
â
IO_VDD = 3.3V
current drive =
HIGH
â
â
0.9
ns
â
100Ω differential
â
load
10pF to ground per
pin
â
850
ps
â
default PCLK phase
-3
â
delay of zero
3
ns
4
â
0.0097
â
49.152
MHz
â
â
40
â
60
%
5
GS4911B/GS4910B HD/SD/Graphics Clock and Timing
Generator with GENLOCK
Data Sheet
36655 - 5
June 2009
33 of 119
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