MEMS Programmable
Oscillator
Page 1 of 6
CMC251-SERIES
■ Low Power Oscillator
■ HCMOS/ LVCMOS output
■ SMD package 2.5 x 2.0 mm
ELECTRICAL SPECIFICATIONS
PARAMETER
SYMBOL
CONDITION
VALUE
Typ.
UNIT
Min.
Max.
Any Frequency between Frequency
range, accurate to
Frequency Range
Supply Voltage
1.0
1.8
110.0
3.3
MHz
V
f0
6 decimal places
Vs
Vs = 1.8V, f0=20MHz, no load
Vs = 2.5V, f0=20MHz, no load
Vs = 2.8V, f0=20MHz, no load
Vs = 3.3V, f0=20MHz, no load
3.5
3.7
3.8
3.8
4.1
4.2
4.5
4.5
mA
mA
mA
mA
Supply Current
Operating Temperature
Frequency Stability
Is
Ta
-20
-40
+70
+85
C
°C
Including First Year aging, initial
frequency tolerance at 25°C,
Frequency stability over
temperature range, supply variation,
load variation
-20
-25
-50
+20
+25
+50
ppm
ppm
ppm
Δf/f0
0.75Vs
V
V
Enable = Open or“1”(VIH≥0.75Vs)
( output signal active )
Disable = GND or “0”(VIL<0.25Vs )
( output high impedance, oscillator
operates )
Standby = GND or “0” VIL<0.25Vs )
0.25Vs
0.25Vs
Enable / Disable/ Standby Function
E/D/St
V
( output weakly pulled down,
oscillator sleep mode )
Enable / Disable Time
T E/D
130
ms
f0=110MHz
Vs=1.8V, E/D =GND
Vs=2.5V to 3.3V, E/D =GND
Output in high impedance state
4.0
4.2
mA
mA
Enable / Disable Current
I E/D
STBY=GND,Vs=1.8V
STBY=GND,Vs=2.5V
STBY=GND,Vs=2.8V to 3.3V
Output is weakly pulled down
0.2
1.1
2.1
1.3
2.5
4.3
Standby Current
Istby
Startup Time
T ST
J PH
5
ms
f0=75MHz,BW 900KHz to 7.5MHz
f0=75MHz,BW 12KHz to 20MHz
0.5
1.3
0.9
2.0
ps
ps
RMS Phase Jitter
RMS Period Jitter
J P
1.8
3
ps
f0=75MHz
f0=75MHz,Vs=2.5 to 3.3V
f0=75MHz, Vs=1.8V
12
14
25
30
ps
ps
Peak to Peak Period Jitter
J PK-PK
RALTRON ELECTRONICS . 10400 N.W. 33r d St . Miami, Florida 33172 . U.S.A.
phone: +1-305-593-6033 . fax: +1-305-594-3973 . e-mail: sales@raltron.com . internet: http://www.raltron.com