Datasheet > EM1537

EM1537

更新时间： 2022-12-22 02:30:23

品牌	Logo	应用领域
EMMICRO		手表
页数	文件大小	规格书
7页	234K
描述
Low Power 32 kHz Circuit for Analog Quartz Watches

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

EM1537 数据手册

EM MICROELECTRONIC - MARIN SA

EM1537

Low Power 32 kHz Circuit for Analog Quartz Watches

Description

Features

The EM1537 is an integrated circuit in a low power CMOS

technology for battery operated wristwatches with bipolar

stepping motors. Time base is a 32 kHz crystal oscillator.

It has a very low current consumption of typ. 100 nA in a

wide voltage range of 1.2 to 3.6 Volt.

Low power 32 kHz Quartz oscillator

Operating voltage ranges 1.55V and 3 Volt.

Very low current consumption typ. 100 nA at 1.5V.

Motor pulse width motor period and motor pulse

chopping is programmable in a wide range by metal

mask and don’t require additional bonds.

The IC is available in two voltage ranges - 1.2 to 1.8 Volt

and 1.8 to 3.6 V.

Fully debounced RESET input for accurate time setting

and power saving during shelf life.

Motor pulse width is programmable from 0.098 ms to

14.65 ms in steps of 0.98 ms by metal mask.

Integrated capacitors, mask selectable is steps of 1 pF up to

35 pF.

Motor period is programmable from 2 x 1s to 2 x 60 s in

steps of 1 s selectable by metal mask.

Operation temperature range: -10°C to +60°C

Available in chip form, SO8 package

Motor pulse chopping is programmable from 1/8 to 8/8 in

steps of 1/8 with chopping frequencies of 1024 Hz or 2048

Hz selectable by metal mask.

Motor period in Motor test mode is selectable 2 x 31.25

ms or 2 x 62.5 ms by metal mask

Applications

Analog watches

Input and output capacitors are integrated on chip and

also programmable by metal mask.

Driver for bipolar stepping motors

With a fully debounced RESET pad the motor can be

stopped.

A multi-functional bidirectional pad MTEST acts as output

for a 32 Hz or 512 Hz for frequency tuning - if open, or – if

connected to Vp – accelerates the motor period by a

factor of 16 or 32.

Functional Diagram

RESET

V_P

RESET

MOT1

C_TR

H1537

(Stepping Motor)

OSCIN

MOT2

V_P

OSCOUT

Operating range of Trimmer Capacitance:

3pF ≤ C_TR≤ 30 pF

www.emmicroelectronic.com

10/06 – rev.A

12 3 4 5 6 7

下载PDF

与EM1537相关器件

型号	品牌	描述	获取价格	数据表
EM15510200J0G	AMPHENOL	Barrier Strip Terminal Block	获取价格
EM15515200J0G	AMPHENOL	Barrier Strip Terminal Block,	获取价格
EM15516200J0G	AMPHENOL	Barrier Strip Terminal Block	获取价格
EM1564	EMMICRO	Low Power Crystal Oscillator 32.768 kHz	获取价格
EM1564V1SON10B	EMMICRO	Low Power Crystal Oscillator 32.768 kHz	获取价格
EM15710200J0G	AMPHENOL	Barrier Strip Terminal Block	获取价格