EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE

Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001

info@euroquartz.co.uk

www.euroquartz.co.uk

Low Frequency - Low power 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

MIL testing to MIL-PRF-55310 available

LSM 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 (±100ppm standard)

Stability*

100 = ±100ppm

050 = ±50ppm

025 = ±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.

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

30kHz to 200kHz

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 (Output)

* Normally HIGH (internal pull-up resistor)

ENABLE/DISABLE vs. POWER DOWN

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.

FEATURES