VW2200 Crystal Clock Feature • • • • Single 1.5V battery operation Low power consumption High precision 32768Hz quartz crystal controlled oscillation 1 Hz stepper motor driven with a pulse Description • The VW2200 is a CMOS simple analog clock IC for a quartz clock circuit 32768Hz oscillation that drives a stepper motor precisely once a second. Electrical Characteristics Parameter Operation Voltage Operation Current Symbol Min VDD 1.2 IC - Typical Max 1.5 1.8 200 Unit Volt uA Standby Current IDD - - 3 uA Oscillator Frequency Fosc - 32768 - Hz Pulse Width TW TW TW VOH VOL TOP 1.0 0 31.25 23.40 15.60 - 0.4 60 ms ms ms Volt Volt °C Code F Code G Code H Output Voltage High Output Voltage Low Operation Temperature Remark VDD=1.5V RL=250ohm VDD=1.5V No Load Crystal Frequency -20 to -50 ppm VDD=1.5V VDD=1.5V Application Diagram M Name VDD OSCI OSCO TEST VSS MOT1 MOT2 Unit X 72.5 314.5 656 905 897.5 854.5 72.5 Micron Y 75.5 77.5 77.5 77.5 202.5 559 602.5 MOT1 MOT2 VSS VDD OSC1 OSC0 TEST *IC substrate should be connected to VDD in PCB (PCB 上 IC 必须接 VDD) VW2200 Crystal Clock Preliminary Product Specification Dated 19 May 2004