Datasheet > H1137V27

H1137V27

更新时间： 2024-09-24 04:20:19

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描述
CMOS circuit for Analog Quartz Watches

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EM MICROELECTRONIC - MARIN SA

H1137

CMOS circuit for Analog Quartz Watches

Description

Features

The H1137 is a low power 32kHz analog watch chip de-

signed to drive a stepping motor. Motor pulse width is

programmable from 0.9765 to 14.65 milliseconds in steps

of 0.9765 milliseconds. Motor pulse period is program-

mable from 2 x 1 to 2 x 60 seconds in steps of 1 second.

Motor pulse period is also programmable from 2 x 0.25 to

2 x 15.75 seconds in steps of 0.25 seconds. Input and

output capacitors are integrated on the chip. Their values

are metal mask selectable. The selection of width, period

and capacitance are metal options and do not require

additional bonds.

32Hz quartz oscillator

Operating voltage range – 1.2V to –1.8V

High oscillator stability

Integrated capacitors, mask selectable

Mask options for pad designation, motor period and

motor pulse width

Shorted motor coil between motor pulses

Fast motor test function

ESD protected terminals

512Hz output on TEST pad for quartz frequency

measurement

Fully debounced TEST input and RESET input

Application

Analog watches

Functional Diagram

Pin Assignment

CROWN

V_N

RESET

MOT₁

V_P

H1137

V_P

(Stepping Motor)

C_TR

H1137

OSC_IN

MOT₂

V_P

Pad

V_N

V_P

Function

Pad location

Negative supply voltage

Positive supply voltage

Oscillator input

OSC_IN

V_P

OSC_OUT

OSC_OUTOscillator output

MOT₁

MOT₂

Motor drive output 1

Motor drive output 2

Operating range of Trimmer Capacitance:

3pF ≤ C_TR≤ 30 pF

RESET Reset input

TEST Test input/output

2 or 8

2 or 8 or 10

Fig. 2

Fig. 1

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