Ultra Low Current KX Series Crystal Oscillator 2.5 x 2.0mm KX251 CMOS 32.768kHz 2.5 x 2.0mm Ceramic SMD Package: (Scale: none Dimensions are in mm) Product Features Recommended Land Pattern: AT Cut 32.768 kHz XO CMOS compatible logic levels Ultra low active current (< 10A) Very tight temperature stability Designed for standard reflow and washing techniques CREATED USING CADSTD LITE FREEWARE FROM WWW.CADSTD.COM. NON-COMMERCIAL USE ONLY. Pb-free and RoHS/Green compliant Product Description Pin Functions: The KX251 Series real time clock oscillator Pin Function achieves superb stability over a broad range 1 OE Function of operating conditions. It utilizes Pericom 2 Ground proprietary technology to achieve ultra low 3 Clock Output current less than 10A. The output clock signal is compatible with LVCMOS/LVTTL logic 4 V DD levels. The device, available on tape and reel, is contained in a 2.5 x 2.0mm surface-mount ceramic package. CREATED USING CADSTD LITE FREEWARE FROM WWW.CADSTD.COM. NON-COMMERCIAL USE ONLY. Part Ordering Information: Applications KX 251 V I S 032.768000 Real-Time Clock Oscillator where low current A B C D and tight stability are needed Stability and Temp Range: Voltage: Internal : Frequency: Stability Temp Range 1=+3.3V 0 ~ 9 FFF.FFFFFF A = +/-20 ppm -20/+70C 2=+2.5V kHz, 3 digits/decimal/6 digits format B = +/-25 ppm -20/+70C C = +/-50 ppm -20/+70C 3=+1.8V D = +/-25 ppm -40/+85C B=+3.0V E = +/-50 ppm -40/+85C F = +/-20 ppm 0/+70C G = +/-25 ppm 0/+70C H = +/-25 ppm 0/+85C I = +/-25 ppm -20/+85C Z = Reference Design Following the above format, Saronix-eCera part numbers will be assigned upon confirmation of exact customer requirements. SaRonix-eCera is a Pericom Semiconductor company US: +1-408-435-0800 TW: +886-3-4518888 www.saronix-ecera.com 14-0033 All specifications are subject to change without notice. KX251 REV C 8/27/2014 1KX251 CMOS 32.768kHz Ultra Low Current KX Series Crystal Oscillator 2.5 x 2.0mm Electrical Performance Parameter Min. Typ. Max. Units Notes Output Frequency 32.768 kHz +1.71 +1.8 +1.89 V +2.25 +2.5 +2.75 V Supply Voltage See part ordering options +2.85 +3.0 +3.15 V +3.0 +3.3 +3.6 V Supply Current, Output Enabled 10 15 A At 15pF load Supply Current, Standby Mode 0.5 A Output Hi-Z Frequency Stability 50 ppm See part ordering options, and note 1 Operating Temperature Range -40 +85 C See part ordering options Output Logic 0, V 0.1 V V OL DD Output Logic 1, V 0.9 V V OH DD Output Load 15 pF See Note 2 Duty Cycle 45 55 % measured 50% of V DD Rise and Fall Time 35 50 ns measured 20/80% of V DD Start-up time 10 ms Notes: 1. Stability includes all combinations of operating temperature, load changes, rated input (supply) voltage changes, initial calibration tolerance (25C), aging (1 year at 25C average effective ambient temperature), shock and vibration. 2. For specifications othere than those listed, please contact sales. Output Enable / Disable Function Parameter Min. Typ. Max. Units Notes Input Voltage (pin 1), Output Enable 0.7 V V or open DD Input Voltage (pin 1), Output Disable (low power standby) 0.3 V V Output is Hi-Z DD Internal Pullup Resistance 100 k Output Disable Delay 100 ns Output Enable Delay 10 ms Absolute Maximum Ratings Parameter Min. Typ. Max. Units Notes Storage Temperature -55 +125 C For the latest product information visit: