LFXO Datasheet, PDF (1/1 Pages) EUROQUARTZ limited – Low Power Coinsumption SMD Crystal Oscillator

EURO QUARTZ
LFXO TF OSCILLATORS
Low Power Coinsumption SMD Crystal Oscillator
32.768kHz
FEATURES
Very low power consumption
Tight frequency tolerance
CMOS Output
Optional output Eanable/Disable with Tri-state
Low EMI emission
Full military testing available
OUTLINE & DIMENSIONS
DESCRIPTION
The 32.7368kHz LFXO oscillator has been designed especially for
applications requiring low power consumption, as low as 500nA. The
oscillator consists of a miniature tuning fork quartz crystal and a
CMOS/TTL compatible hybrid circuit. Each crystal is pre-qualified
before assembly by electrical tests and temperature characterization.
SPECIFICATION
Specifications are typical at 25°C unless otherwise indicated.
Specifications are liable to change without notice.
Frequency:
32.768kHz
Supply Voltage:
1.8V to +5.0 Volts ±10%
Calibration Tolerance:
±10, ±50 or ±100ppm
Frequency Stability
over Operating Temperature Range
0° ~ +50°C:
±25ppm
-40° ~ +85°C:
±100ppm
-55° ~ +125°C: ±100ppm
Ageing:
±1ppm year typical
±3ppm per year maximum.
Shock, Survival:
5000g, 0.3ms, ½ sine
Vibration Survival:
20g, 10~2000Hz swept sine
Frequency Change vs.
10% Output Load Change:
±1ppm maximum.
Operating Temperature Range
Commercial:
-10° to +70°C
Industrial:
-40° to +85°C
Military:
-55° to +125°C
Typical Current Consumption
Vdd = 1.8V:
0.5µA
Vdd = 2.5V:
0.6µA
Vdd = 3.3V:
0.7µA
Vdd = 5.0V:
1.3µA
Output:
CMOS
Rise/Fall Times:
12ns typical, 25ns maximum
Duty Cycle:
45/55%
Process Temperature:
260°C, 20 seconds
Storage Temperature:
-55° to +125°C
ENABLE/DISABLE OPTIONS
There are two Enable/Disable options available, 'E' and 'N'. The 'E'
option stops oscillating when the output is put into the High Z state.
the 'N' version does not have Pad 1 connected internally. The table
below describes the 'E' Enable/Disable option.
Enable (Pad 1 High) Disable (Pad 1 Low)
Output Frequency Output
Oscillator Oscillates
Current Normal
High Z state
Stops
Very Low
When Pad 1 is allowed to float it is held high
(output enabled) by an internal pull-up resistor.
HOW TO ORDER LFXO SMD CRYSTAL OSCILLATORS
LFXO TF 4
S T - SM3 - 32.768k 30 / 30 / – / I
TF = Low Power
Supply Voltage
1 = 1.8V
2 = 2.5V
3 = 3.0V
4 = 3.3V
5 = 5.0V
Enable/Disable
option, T or N
Blank = standard
S = special or
custom
Terminations
Blank = SM1 =Gold plated
SM3 = Solder dipped
SM5 = Solder dipped
(SM1 and SM5 are pB free)
Frequency
k = kHz
Calibration
Tolerance
at 25°C
(in ±ppm)
Frequency
Stability over
Temp. Range
(in ppm)
OR
— / — / 50
Temp. Range
C = -10° ~ +70°C
I = -40° ~ +85°C
M = -55° ~ +125°C
S = Customer specified
/
I
Total
Frequency
Tolerance
(in ppm)
Temp. Range
C = -10° ~ +70°C
I = -40° ~ +85°C
M = -55° ~ +125°C
S = Customer specified
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: [phone] Fax: [phone] [e-mail] www.euroquartz.co.uk