Data Sheet

EURO QUARTZ
XOA91 Low Frequency Oscillator
7 x 5mm SMD oscillator with AT-Cut Crystal
32.768kHz
FEATURES
7 x 5mm SMD package with AT-Cut crystal for high stability
Frequency 32.768kHz for real time clock applications
Tristate (Enable/Disable) function as standard
Supply voltage 3.3V, 2.5V or 1.8 Volts
DESCRIPTION
XOA91miniature oscillators consist of a TTL/CMOS-compatible hybrid
circuit together with a miniature AT-Cut quartz crystal packaged in a
low-profile, industry-standard ceramic package. The AT-Cut crystal
provides high frequency stability but with a low µA current
consumption, usually only available with a X-Cut crystal.
SUPPLY VOLTAGE DEPENDANT SPECIFICATION
Supply Voltage (Vdd)
Current Consumption
(32.768kHz, 15pF load)
+1.8VDC
65µA typ., 80µA max.
+2.5VDC
+3.3VDC
70µA typ., 90µA max. 75µA typ., 100µA max.
Output Logic HIGH
(VOH; IOH= -1.0mA)
1.62 V min.
2.25V min.
2.97V min.
Output Logic LOW
(VOL; IOL= -1.0mA)
0.18V max.
0.25V max.
0.33V max.
Rise Time/Fall Time
5.0ns typ., 10ns max.
4.0ns typ., 10ns max.
GENERAL SPECIFICATION
Frequency:
Supply Voltage:
Output Logic:
Frequency Stability:
Operating Temp. Range:
3.0ns typ., 10ns max.
PART NUMBERING
from 10kHz to 100kHz
1.8V or 2.5V±10% or 3.3 Volts ±10%
HCMOS/LSTTL
±25ppm, ±50ppm or ±100ppm
over Operating Temp. Range
-10 to +70°C (Commercial)
-40 to +85°C (Industrial)
±1ppm max.
15pF
50%±3% tyical, 50%±5% max.
-55° to +125°C
0.8ms typical 5.0ms max.
±3ppm max. per year
Supply V. vs. Freq. Stability:
Output Load: :
Duty Cycle:
Storage Temperature:
Startup Time:
Ageing:
Tristate Function (Pad 1):
Output (Pad 3) is active if Pad 1 is not connected or a
voltage to Pad 1 is 'HIGH'. Output is high impedance
when 'LOW' or GROUND is applied to Pad 1.
Enable/Disable Time:
Enable: 1ms max., Disab: 0.1µs max.
Example:
32.768kHz XOA91025UCTA
Frequency
Series Designation XOA91
Temperature Stability
025 = ±25ppm
050 = ±50ppm
100 = ±100ppm
Output CMOS/TTL
Operating Temperature Range
C = Commercial
(-10° to +70°C)
I = Industrial
(-40° to +85°C)
Tristate Function
Supply Voltage
A = 3.3Volts
B = 2.5 Volts
C = 1.8 Volts
OUTLINE & DIMENSIONS
Pad Connections:
1. High Enable
2. Ground
3. Output
4. Supply Voltage
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk
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