User's Manual

AP6255 Datasheet
AMPAK Technology Inc. www.ampak.com.tw
Proprietary & Confidential Information
Doc. NO:
18
9. External clock reference
External LPO signal characteristics
Parameter Specification Units
Nominal input frequency 32.768 kHz
Frequency accuracy
30
±
ppm
Duty cycle 30 - 70 %
Input signal amplitude 400 to 1800 mV, p-p
Signal type Square-wave -
Input impedance
>100k
<5
Ω
pF
Clock jitter (integrated over 300Hz – 15KHz) <1 Hz
Output high voltage 0.7Vio - Vio V