July 2005
P2781/82/84
rev 1.5
AC Electrical Characteristics
Symbol
Parameter
Min
Typ
Max
Unit
fIN
Input frequency: P278XA
3
-
78
MHz
P2781A
P2782A
P2784A
3
6
12
78
156
312
fOUT
Output frequency:
-
MHz
tLH
Output rise time (measured at 0.8 V to 2.0 V,
-
1
-
nS
nS
pS
%
P278XA 25pF scope probe loading)
tHL
Output fall time (measured at 2.0 V to 0.8 V, 25
-
1
-
P278XA pF scope probe loading)
tJC
Jitter (cycle to cycle, ± 6sigma, 1000 sweeps,
-
±250
-
P2781A ± 0.5% spread, I/O frequency = 16MHz)
tD
Output duty cycle deviation (error from 50% duty
±1 at 3MHz
-20
-
±2 at 82MHz
+20
P2781A cycle, 25pF scope probe loading)
∆F
Frequency deviation tolerance from BW% stated
0
%
P278XA in the Loop Filter Selection Table
General Purpose EMI Reduction IC
6 of 11
Notice: The information in this document is subject to change without notice.
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
