EURO
QUARTZ
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 Email: info@euroquartz.co.uk www.euroquartz.co.uk
Low Power - Low Frequency SMD Oscillator
DESCRIPTION
LSM series oscillators are precision surface mount oscillators with a
frequency range from 30kHz to 200kHz. The part comprises of a
hermetically sealed crystal with a hybrid circuit sealed in a ceramic
package with a Kovar lid. Full MIL testing is available.
Low current consumption, low frequency from 30kHz
Low profile, miniature SMD package
Full military testing available
Testing to MIL-PRF-55310 available
LSM Series Oscillators
Frequency Range****: 30kHz to 200kHz (32.768kHz)
Supply Voltage*: 3.3 or 5.0 Volts ±10%
Calibration Tolerance**
Code A: ±0.001% (±10ppm)
Code B: ±0.0025%
Code C: ±0.01%
Frequency Stability***
0° to +50°C: ±0.0025% typical (±25ppm)
±0.004% maximum (±40ppm)
-20° to +40°C: ±0.007% typical (±70ppm)
±0.01% maximum (±100ppm
Voltage Coefficient
±1ppm/V typical
±3ppm/V maximum
Ageing: ±1ppm/year typical
±3ppm/year maximum
Shock: 1000g, 1ms, ½ sine, ±3ppm max.
Vibration: 10g rms, 10-2000Hz, ±3ppm max.
Frequency Change
vs. Output Load Change: ±1ppm maximum
Operating Temperature: -10° to +70°C Commercial
-40° to +85°C Industrial
-55° to +125°C Military
Output Voltage (5.0V supply)
HIGH: 4.8V minimum, 4.95V typical
LOW: 0.2V maximum, 0.05V typical
Rise/Fall Times: 12ns typical
Symmetry: 40/60% maximum, 45/55% typical
Supply Current
5.0V supply: 15 mA max., 8.3 mA typical
3.3V supply: 10 mA max., 5.5 mA typical
Packaging: Tray pack (standard)
16mm tape, 17.8cm or 33cm reels
SPECIFICATION
OUTLINE & DIMENSIONS
Example: 32.7680kHz LSMA050UMTA
PART NUMBERING
Frequency
Series Designation LSM
Calibration Tolerance (see table above)
Stability*
100 = ±100ppm
50 = ±50ppm
25 = ±25ppm
Output Universal (CMOS)
Operating Temp. Range
C = Commercial
I = Industrial
M = Military
Pad 1 Function
T = Enable/Disable
Blank = not connected
Supply Voltage**
Blank = 5.0 Volts
A = 3.3 Volts
* For other stability requirements enter figure required.
** For other supply voltage enter required voltage.
P - Power Down: When Pad 1 is LOW the oscillator stops running
T - Enable/Disable: When Pad 1 is LOW the internal oscillator
continues to run but the output (Pad 3) is in a
high impedance (Z) state.
Power Down: Disabled current consumption low,
recovery delayed.
Enable/Disable: Disabled current consumption lower than normal,
Recovery immediate.
Option
Power Down P
Enable/Disable T
Not Connected Blank
LOW High Z
HIGH Frequency output
LOW High Z
HIGH Frequency output
NC Frequency output
ENABLE/DISABLE, POWER DOWN, NOT CONNECTED
Specifying
Code
Pad 1* Pad 3
* Normally HIGH (internal pull-up resistor)
ENABLE/DISABLE vs. POWER DOWN
Notes:
* Contact factory for lower supply voltages
** Tighter tolerances avialable
*** Does not include calibration tolerance. Positive variations
are small compared to negative variations.
**** Contact factory for frequencies other than 32.7680kHz
