EM Microelectronic EM1344
The H1344 is a low power 32kHz analog clock integrated circuit designed in CMOS technology to drive a bipolar stepping motor. For versions v143 and v221, the TEST1 and TEST2 pins are only for test and must not be used in the application.| Part No. | EM1344 |
|---|---|
| Datasheet | EM1344 Download |
| Manufacturer |  EM Microelectronic |
| Description | CMOS Circuit for Analog Quartz Clocks |
| Buy | Stock & Price |
DESCRIPTION
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 available options).APPLICATIONS
● Stepper Motor Driver for time-switches● Analog clocks
FEATURES
● 32kHz quartz oscillator● Integrated capacitors, mask selectable
● Single battery operation
● 0.7 A 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 Functional Diagram Pin Assignment 1.5V + C TR 1 8 2 H1344 7 V 143 3 V 221 6 4 5 Motor M Fig. 1 VDD 1 VSS 2 MOT2 3 TEST1 4 H 1344 V143 V221 8 OSCIN 7 OSCOUT 6 TEST2 5 MOT1 Fig.
