H1344 Datasheet, PDF(1/6 Page) EM Microelectronic - MARIN SA – CMOS Circuit for Analog Quartz Clocks with Bipolar Stepping Motor Drive

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H1344 Datasheet, PDF (1/6 Pages) EM Microelectronic - MARIN SA – CMOS Circuit for Analog Quartz Clocks with Bipolar Stepping Motor Drive

EM MICROELECTRONIC - MARIN SA

H1344

CMOS Circuit for Analog Quartz Clocks with Bipolar

Stepping Motor Drive

Description

The H 1344 is a low power 32Khz analog clock integrated

circuit designed in HCMOS 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.

Applications

! Analog clocks

Features

! 32kHz quartz oscillator

! Integrated capacitors, mask selectable

! Single battery operation

! 0.7 ÂµA 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 +

CTR

H1344

2 V40 7

V41

3 V47 6

Motor

Alarm Output

Fig. 1

VDD 1

VSS 2

MOT2 3

ALARMIN 4

H1344

V40

V41

V47

V143

8 OSCIN

7 OSCOUT

6 ALARMOUT

5 MOT1

VDD 1

VSS 2

MOT2 3

ALARMIN 4

H1344

V38

8 OSCOUT

7 OSCIN

6 ALARMOUT

5 MOT1

Fig. 2

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