Ultra Low Power 32.768KHz
MEMS Oscillator
Page 1 of 5
CMC208-SERIES
■ Ultra Low power: < 1A
■ Fixed 32.768 kHz
■ No Supply Voltage external bypass capacitors required
■ XTAL replacement in 2.0 mm x 1.2 mm SMD
■ SMD package 2.0 x 1.2 mm
ELECTRICAL SPECIFICATIONS
PARAMETER
SYMBOL
CONDITION
Min.
VALUE
Typ.
32.768
Max.
UNIT
Frequency nominal
Supply Voltage
f
0
Vs
T
a
= -10°C to +70°C
T
a
= -40°C to +85°C
Vs = 1.8V, no load condition,
T
a
= 25°C
Vs = 3.63V max, T
a
= -10°C to +70°C
no load condition
Vs = 3.63V max, T
a
= -40°C to +85°C
no load condition
Is does not include output stage
current or load. To derive total
operating current( no load) ,add
Is+(0.065A)(peak to peak output
Voltage swing )
Vs = 1.5V~3.63V max,
T
a
= -40°C to +85°C,no load condition
Commercial
Industrial
After two reflows, at 25°C
Vs=1.5V ~ 3.63V
T
a
= -10°C to +70°C, Vs=1.5~3.63V
T
a
= -40°C to +85°C, Vs=1.5~3.63V
T
a
= -10°C to +70°C, Vs=1.2~1.5V
Measured peak to peak, inclusive of
initial tolerance at 25°C, variations over
operating temperature range, rated
supply voltage and load
T
a
= -40°C to +85°C, 0 to 90% Vs
T
START
T
a
= -40°C ≤ T
a
≤ +50°C, valid output
T
a
= 50°C ≤ T
a
≤ +85°C, valid output
-10
-40
1.2
1.5
kHz
3.63
3.63
V
V
0.9
1.3
1.4
A
A
A
Core Supply Current
Is
Output Stage Supply Current
Operating Temperature
Frequency Tolerance
Is
0ut
T
a
0.065
0.125
+70
+85
20
75
100
250
A/Vpp
C
°C
ppm
ppm
ppm
ppm
Δf/f
0
Frequency Stability
Δf/f
0
Power supply Ramp
Start-up Time
100
180
300
450
ms
ms
ms
RALTRON ELECTRONICS
10400 N.W . 33
rd
St
Miam i, 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
Ultra Low Power 32.768KHz
MEMS Oscillator
CMC208-SERIES
2 of 5
OUTPUT CHARACTERISTICS
VALUE
PARAMETER
SYMBOL
V
OH
Output Levels
CONDITION
Min
0.9 Vs
Typ.
Max
UNIT
V
LVCMOS
Vs= 1.5V ~ 3.63V. I
OH
= -10A, 15 pF
Vs= 1.5V ~ 3.63V. I
OL
= 10A, 15 pF
V
OL
Duty Cycle
Rise/ Fall Time
0.1Vs
48
52
100
200
50
V
%
ns
ns
DC
Tr/ Tf
10-90% Vs, 15 pF Load, Vs=1.5V to 3.63V
10-90% Vs, 5 pF Load, Vs≥1.62V
VALUE
PARAMETER
SYMBOL
CONDITION
DC bias programmable output voltage
High range
Vs=1.5V~3.63V, I
OH
= -0.2
A,
10pF Load
See Table 1
DC bias programmable output voltage
Low range
Vs=1.5V~3.63V, I
OH
= 0.2
A,
10pF Load
See Table 1
48
30-70%(
V
OL
/V
OH
), 10 pF Load
Vs= 1.5V ~ 3.63V, 10 pF Load ,
I
OH
/
I
OL
=±0.2
A
This output is intended for a receiver that
is AC- coupled, see table 1
T
a
= -40°C to +85°C, Vs=1.5~3.63V
-0.055
35
Min
Typ.
Max
UNIT
Nano Drive
TM
Programmable
Reduced Swing Output
V
OH
Output Levels
0.6 to 1.225
V
V
OL
Duty Cycle
Rise/ Fall Time
AC- couple Programmable
Output Swing
Programmable Output Voltage Swing
Tolerance
Period Jitter RMS
0.35 to 0.80
V
DC
Tr/ Tf
V sw
52
200
%
ns
0.20 to 0.80
V
0.055
V
ns
Jp
Cycles = 10000, T
a
= 25°C, Vs=1.5~3.63V
Table1. NanoDrive
TM
Output levels
NanoDrive
TM
D26
D14
D74
AA3
V
OH
( V )
1.2
1.1
0.7
-
V
OL
( V )
0.6
0.4
0.4
-
Swing ( mV )
600±55
700±55
300±55
300±55
1.8V logic compatible
1.8V logic compatible
XTAL compatible
XTAL compatible
RALTRON ELECTRONICS
10400 N.W . 33
rd
St
Miam i, 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
Ultra Low Power 32.768KHz
MEMS Oscillator
CMC208-SERIES
3 of 5
MECHANICAL DIMENSIONS AND PIN FUNCTIONING
PIN
1
2
3
4
SYMBOL
NC
GND
OUTPUT
Vs
FUNCTION
No connect. This pin will not respond to any input signal. It can be
left floating
Electrical Ground
Output Signal
1
Supply Voltage
2
Note: 1. Oscillator output signal. When interfacing to an MCU’s XTAL, the CLK Out is typically connected to the
Receiving IC’s X
IN
pin. Oscillator includes an internal driver. The output swing and operation is not dependent on capacitive
loading.
2. Connect to supply voltage 1.5V≤Vs≤3.63V for operation over -40°C to +85°C temperature range. Under normal operation
Conditions, Vs does not require external bypass/ decoupling capacitor(s). Internal power supply filtering will reject more than
±150mV p-p with frequency components through 10MHz.
RALTRON ELECTRONICS
10400 N.W . 33
rd
St
Miam i, 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
Ultra Low Power 32.768KHz
MEMS Oscillator
CMC208-SERIES
4 of 5
ENVIRONMENTAL
REFLOW PROFILE
Soldering
Moisture Sensitivity Level
Temperature Cycle
Vibration
Mechanical Shock
Storage Temperature
MIL-STD-883F, Method 2003
MSL 1 at 260°C
JESD22, Method A104
MIL-STD-883F, Method 2007
MIL-STD-883F, Method 2002
-65° ……. +150°C
REFLOW PROFILE
t
P
T
P
Ramp-up
Critical Zone
T
L
to T
P
T
L
T
SMAX
Temp.
[°C]
T
SMIN
t
S
Preheat
t
L
Ramp-down
t[25°C] to Peak
Time [sec]
Temperature Min Preheat
Temperature Max Preheat
Time (T
SMIN
to T
SMAX
)
Temperature
Peak Temperature
Ramp-up rate
Ramp-down rate
Time within 5°C of Peak Temperature
Time t[25°C] to Peak Temperature
Time
Recommended Solder Reflow Profile
T
SMIN
T
SMAX
t
S
T
L
T
P
R
UP
R
DOWN
t
P
t[25°C] to Peak
t
L
150°C
200°C
60-180 sec.
217°C
260°C
3°C/sec max.
6°C/sec max.
10 sec
480 sec.
60-150 sec.
RALTRON ELECTRONICS
10400 N.W . 33
rd
St
Miam i, 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
Ultra Low Power 32.768KHz
MEMS Oscillator
CMC208-SERIES
ORDERING INFORMATION
5 of 5
SERIES
SUPPLY VOLTAGE
(V)
Frequency
Stability
TEMP
RANGE
(°C )
Output Signal
-
OUTPUT FREQUENCY
(kHz)
1: LVCMOS
NanoDrive
TM
Reduced
Swing Output setting
options
12: Vs=1.2V~3.6V
A: AC-coupled
A: ±75 ppm
B: ±100ppm
C: ±200ppm
U: -10~70
V: -40~85
26:D26
14:D14
74:D74
3:AA3
See table 1
D: DC- coupled
-
CMC208
15: Vs=1.5V~3.6V
32.768
APPROVALS
Eng. approval, date: SP, 07 / 21 / 2016
Created by, date:
Revision: A
SP, 07 /21 / 2016
RALTRON ELECTRONICS
10400 N.W . 33
rd
St
Miam i, 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
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