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