ICS275
TRIPLE PLL FIELD PROGRAMMABLE VCXO CLOCK SYNTHESIZER
EPROM VCXO AND SYNTHESIZER
AC Electrical Characteristics
Unless stated otherwise,
VDD = 3.3V ±5%,
Ambient Temperature -40 to +85° C
Parameter
Input Frequency
Crystal Pullability
VCXO Gain
Symbol
F
IN
F
P
Conditions
Fundamental crystal
0V< VIN < 3.3 V, Note 1,
Config. Dependent
VIN = VDD/2 + 1 V,
Note 1, Config.
Dependent
Min.
5
100
Typ.
Max. Units
27
MHz
ppm
110
ppm/V
Output Rise/Fall Time
Output Rise/Fall Time
Duty Cycle
Power-up time
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
40
1.0
2.0
49-51
4
0.6
50
+200
-250
250
60
10
2
ns
ns
%
ms
ms
ps
ps
ps
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 15pF 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.
78
70
68
37
Max. Units
°
C/W
°
C/W
°
C/W
°
C/W
Thermal Resistance Junction to Case
IDT™ / ICS™
TRIPLE PLL FIELD PROGRAMMABLE VCXO CLOCK SYNTHESIZER 6
ICS275
REV D 102808
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
