Ultra Low Power 32.768KHz
MEMS TCXO
Page 1 of 5
CMC159-SERIES
■ Ultra Low power: < 1A
■ Fixed 32.768 kHz
■ No Supply Voltage external bypass capacitors required
■ Frequency Stability over Temperature as low as ±5ppm
■ Small SMD package 1.5 x 0.8 mm
ELECTRICAL SPECIFICATIONS
PARAMETER
SYMBOL
CONDITION
VALUE
Typ.
UNIT
Min.
Max.
Frequency nominal
Supply Voltage
32.768
kHz
V
f0
Vs
Ta = -40°C to +85°C
1.5
3.63
A
Vs = 1.8V, no load condition,
LVCMOS, Ta = 25°C
0.99
Vs = 3.63V max, Ta = -10°C to +70°C
no load condition
Vs = 1.5V to 3.63V, Ta = -40°C to
+85°C, no load condition
Is does not include output stage
current or load.
Core Supply Current
Is
A
1.52
Commercial
Industrial
0
-40
+70
+85
C
°C
Operating Temperature
Ta
-5
-10
-20
+5
+10
+20
+10
+13
+22
+0.75
+1.5
ppm
ppm
ppm
ppm
ppm
ppm
ppm
ppm
Initial offset is defined as the frequency
deviation from the nominal value at
room temperature after reflow
Frequency Stability vs. Temperature
( without initial offset )
Δf/Ta
-10
-13
-22
Initial offset is defined as the frequency
deviation from the nominal value at
room temperature after reflow
Frequency Stability vs. Temperature
( with initial offset )
Δf/Ta
Δf/Vs
Vs= 1.8V±10%
Vs= 1.5V ~ 3.63V
-0.75
-1.5
Frequency stability vs. Supply Voltage
Power supply Ramp
Ta = -40°C to +85°C, 0 to 90% Vs
100
ms
Ta = -40°C ≤ Ta ≤ +60°C, valid output
Ta = +60°C ≤ Ta ≤ +70°C, valid output
Ta = +70°C ≤ Ta ≤ +85°C, valid output
180
35
300
350
380
ms
ms
ms
Start-up Time
T START
Long Term Frequency Stability
Period Jitter RMS
Ta=25°C, Vs=3.3V
-1.0
+1.0
ppm
ns
Δf/T
Cycles = 10,000,Ta=25°C,
Vs= 1.5V ~ 3.63V
Long Term Jitter
81920 cycles ( 2.5 sec ), 100 samples
2.5
s p-p
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