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EM1344- Timing & Clock Circuits

CMOS Circuit for Analog Quartz Clocks with Bipolar Stepping Motor Drive - Ultra-Low Power

General Description

The H1344 is a low power 32kHz analog clock integrated circuit designed in CMOS technology to drive a bipolar stepping motor. A set of capacitors is provided on chip to be
connected, in any combination, to the two oscillator terminals, with a maximum total capacitance of 48pF. Both the motor pulse period and the motor pulse width are maskprogrammable (see page 6 for already available options).
For versions v143 and v221, the TEST1 and TEST2 pins are only for test and must not be used in the application.

Applications:

• Stepper Motor Driver for time-switches
• Analog clocks