ICS270
TRIPLE PLL FIELD PROGRAMMABLE VCXO CLOCK
EPROM VCXO AND SYNTHESIZER
AC Electrical Characteristics
Unless stated otherwise,
VDD = 3.3V ±5%,
Ambient Temperature -40 to +85° C
Parameter
Input Frequency
Output Frequency
Crystal Pullability
VCXO Gain
Output Rise/Fall Time
Output Rise/Fall Time
Duty Cycle
Power-up time
Symbol
F
IN
F
P
Conditions
Fundamental crystal
0V< VIN < 3.3 V, Note 1
VIN = VDD/2 + 1 V,
Note 1
Min.
5
0.314
100
Typ.
Max. Units
27
200
MHz
MHz
ppm
ppm/V
ns
ns
60
10
2
%
ms
ms
ps
ps
250
ps
110
1.0
2.0
40
49-51
4
0.6
50
+200
-250
t
OF
t
OF
80% to 20%, high drive,
Note 2
80% to 20%, low drive,
Note 2
Note 3
PLL lock-time from
power-up
PDTS goes high until
stable CLK output
One Sigma Clock Period Jitter
Maximum Absolute Jitter
Pin-to-Pin Skew
t
ja
Configuration Dependent
Deviation from Mean,
Configuration Dependent
Low Skew Outputs
Note 1: External crystal device must conform with Pullable Crystal Specifications listed on page 3.
Note 2: Measured with 15 pF load.
Note 3: Duty Cycle is configuration dependent. Most configurations are min 45% / max 55%.
Thermal Characteristics
Parameter
Thermal Resistance Junction to
Ambient
Symbol
θ
JA
θ
JA
θ
JA
θ
JC
Conditions
Still air
1 m/s air flow
3 m/s air flow
Min.
Typ.
93
78
65
20
Max. Units
°
C/W
°
C/W
°
C/W
°
C/W
Thermal Resistance Junction to Case
IDT™ / ICS™
TRIPLE PLL FIELD PROGRAMMABLE VCXO CLOCK
7
ICS270
REV D 052008
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
