Product folder

H1344 CMOS Circuit for Analog Quartz Clocks with Bipolar Stepping Motor Drive

Datasheet DataSheet 190 Kb

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 mask-programmable (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

Features

• 32kHz quartz oscillator • Integrated capacitors, mask selectable • Single battery operation • 0.7 uA typical current consumption • Low resistance outputs for bipolar stepping motor • Mask options for pad designation, motor period and pulse width, alarm frequency, modulation and duty cycle • Alarm output function compatible with either NPN or PNP-driver transistors • Alarm input function • 1024Hz output on ALIN pad for oscillator frequency verification • Fast test function • ESD protected terminals