Datasheet > EM3027-13

EM3027-13

更新时间： 2024-11-19 12:56:31

品牌	Logo	应用领域
EMMICRO		电池
页数	文件大小	规格书
28页	1086K
描述
Battery Switchover and Trickle Charger

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EM3027-13 数据手册

EM MICROELECTRONIC - MARIN SA

EM3027

Real Time Clock with I2C or SPI, Crystal Temperature

Compensation, Battery Switchover and Trickle Charger

Description

Features

The EM3027 is an Ultra Low Power CMOS real-time

clock IC with two serial interface modes: I2C or SPI. The

interface mode is selected by the chip version (see §12).

 Fully operational from 2.1 to 5.5V

 Supply current typically 600 nA at 1.4V

 Thermal compensated crystal frequency

 Oscillator stability 0.5 ppm / Volt

The basic clock is obtained from the 32.768 kHz crystal

oscillator. A thermal compensation of the frequency is

based on the temperature measurement and calculation

of the correction value. The temperature can be

measured internally or be input by an external application

to the register.

 Counter for seconds, minutes, hours, day of week,

date months, years in BCD format and alarm

 Leap year compensation

 16-bits timer with 2 working modes

 Two low voltage detection levels V_Low1, V_Low2

 Automatic supply switchover

 Serial communication via I2C (I²C-bus specification

Rev. 03 compatible – see §10.2) or SPI (3-line SPI-

bus with separate combinable data input and output)

The chip provides clock and calendar information in BCD

format with alarm possibility. The actual contents are

latched at the beginning of a read transmission and

afterwards data are read without clock counter data

corruption.

An integrated 16-bit timer can run in Zero-Stop or Auto-

Reload mode.

 Thermometer readable by the host

 Trickle charger to maintain battery charge

 Integrated oscillator capacitors

An interrupt request signal can be provided through

INT/IRQ pin generated from alarm, timer, voltage

detector and Self-Recovery system.

 Two EEPROM and 8 RAM data bytes for application

 Digital Self-Recovery system

An integrated trickle charger allows recharging backup

supply V_Backfrom the main supply voltage V_CCthrough

internal resistor(s). The internal device supply will

switchover to V_CCwhen V_CCis higher than V_Backand vice

versa.

 No busy states and no risk of corrupted data while

accessing

 One hour periodical configuration registers refresh

 Support for standard UL1642 for Lithium batteries

 Standard temperature range: -40°C to +85°C

 Extended temperature range: -40°C to +125°C

 Packages: TSSOP8, TSSOP14, SO8.

The device operates over a wide 1.4 to 5.5V supply

range and requires only 900 nA at 5V. It can detect

internally two supply voltage levels.

Applications

 Utility meters

Block Diagram

 Battery operated and portable equipment

 Consumer electronics

 White/brown goods

 Pay phones

EM3027

Temperature

Sensor

 Cash registers

 Personal computers

 Programmable controller systems

 Data loggers

Watch & Alarm

Oscillator

- Seconds

- Minutes

- Hours

- Days

V_CC

Power

Management

V_REG

V_Back

- Weekdays

- Months

- Years

SCL/SCK

SDA/SO

I2C

or SPI

Timer

CLKOUT

Output

Control

INT or IRQ

CLKOE

EEPROM

www.emmicroelectronic.com

3027-DS.doc, Version 8.0, 25-Jan-13

12 3 4 5 6 7...28

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与EM3027-13相关器件

型号	品牌	获取价格	描述	数据表
EM3027IDSSO08A	EMMICRO	获取价格	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and
EM3027IDSSO08B	EMMICRO	获取价格	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and
EM3027IDSSO8B	EMMICRO	获取价格	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and
EM3027IDSTP14	EMMICRO	获取价格	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and
EM3027IDSTP8A	EMMICRO	获取价格	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and
EM3027IDSTP8B	EMMICRO	获取价格	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and
EM3027IDSWS8	EMMICRO	获取价格	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and
EM3027IDXSO08B	EMMICRO	获取价格	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and
EM3027IDXSO8B	EMMICRO	获取价格	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and
EM3027IDXTP14	EMMICRO	获取价格	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and

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