ICS251 DATASHEET
AC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature -40 to +85C
Parameter
Symbol
Conditions
Fundamental Crystal
Input Clock
Min.
5
Typ. Max. Units
27
MHz
MHz
MHz
ns
Input Frequency
FIN
3
150
200
Output Frequency
Output Rise Time
Output Fall Time
Duty Cycle
0.314
tOR
tOF
20% to 80%, Note 1
80% to 20%, Note 1
Note 2
1
1
ns
40
49-51
60
10
%
PLL lock time from
power-up
4
ms
PDTS goes high until stable
CLK output, Spread
Spectrum Off
.6
2
7
ms
Power-up time
PDTS goes high until stable
CLK output, Spread
Spectrum On
4
ms
ms
PDTS goes high until
spread spectrum is stable,
Spread Spectrum On
10
50
One Sigma Clock Period Jitter
Maximum Absolute Jitter
Configuration Dependent
50
ps
ps
Deviation from Mean.
Configuration Dependent
tja
+200
Note 1: Measured with 15 pF load.
Note 2: Duty Cycle is configuration dependent. Most configurations are minimum 45% and maximum 55%.
Thermal Characteristics
Parameter
Symbol
JA
Conditions
Min.
Typ. Max. Units
C/W
C/W
C/W
C/W
Still air
150
140
120
40
Thermal Resistance Junction to Ambient
Thermal Resistance Junction to Case
JA
1 m/s air flow
3 m/s air flow
JA
JC
FIELD PROGRAMMABLE SS VERSACLOCK SYNTHESIZER
6
REVISION E 05/19/14
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
