EM3027IDSWS8 datasheet(1/28 Pages) EMMICRO

номер детали	EM3027IDSWS8

подробное описание детали	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and Trickle Charger

PDF	28 Pages

Scroll/Zoom	100%

производитель	EMMICRO [EM Microelectronic - MARIN SA]

домашняя страница	http://www.emmicroelectronic.com

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EM3027

Copyright

 2013, EM Microelectronic-Marin SA

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

1

www.emmicroelectronic.com

Real Time Clock with I2C or SPI, Crystal Temperature

Compensation, Battery Switchover and Trickle Charger

Description

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).

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.

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.

An interrupt request signal can be provided through

INT/IRQ pin generated from alarm, timer, voltage

detector and Self-Recovery system.

An integrated trickle charger allows recharging backup

supply VBack from the main supply voltage VCC through

internal resistor(s). The internal device supply will

switchover to VCC when VCC is higher than VBack and vice

versa.

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

 Battery operated and portable equipment

 Consumer electronics

 White/brown goods

 Pay phones

 Cash registers

 Personal computers

 Programmable controller systems

 Data loggers

Features

 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

 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 VLow1, VLow2

 Automatic supply switchover

 Serial communication via I2C (I

2C-bus specification

Rev. 03 compatible

– see §10.2) or SPI (3-line SPI-

bus with separate combinable data input and output)

 Thermometer readable by the host

 Trickle charger to maintain battery charge

 Integrated oscillator capacitors

 Two EEPROM and 8 RAM data bytes for application

 Digital Self-Recovery system

 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.

Block Diagram

SCL/SCK

SDA/SO

CLKOUT

EM3027

VCC

VBack

Watch & Alarm

- Seconds

- Minutes

- Hours

- Days

- Weekdays

- Months

- Years

Timer

EEPROM

Temperature

Sensor

SI

CS

CLKOE

INT or IRQ

X1

X2

VREG

Oscillator

Power

Management

Output

Control

I2C

or SPI

EM MICROELECTRONIC - MARIN SA

Аналогичный номер детали - EM3027IDSWS8

производитель	номер детали	датащи	подробное описание детали
EM Microelectronic - MA...	EM3027IDSSO08A	593Kb / 28P	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and Trickle Charger
	EM3027IDSSO08B	593Kb / 28P	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and Trickle Charger
	EM3027IDSTP8A	593Kb / 28P	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and Trickle Charger
	EM3027IDSTP8B	593Kb / 28P	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and Trickle Charger

More results

Аналогичное описание - EM3027IDSWS8

производитель	номер детали	датащи	подробное описание детали
EM Microelectronic - MA...	EM3027	593Kb / 28P	Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switchover and Trickle Charger
Microchip Technology	MCP7940N	562Kb / 36P	Low-Cost I2C??Real-Time Clock/Calendar with SRAM and Battery Switchover 2011
Micro Analog systems	MCP7952X	946Kb / 50P	3V SPI Real-Time Clock Calendar with Battery Switchover
STMicroelectronics	M41T83	1,001Kb / 62P	Serial I2C bus real-time clock (RTC) with battery switchover 26-Oct-2012
STMicroelectronics	M41T93	787Kb / 51P	Serial SPI bus real-time clock with battery switchover 12-Oct-2011
Microchip Technology	MCP7940N	1Mb / 42P	Low-Cost I2C??Real-Time Clock/Calendar with SRAM and Battery Switchover 11/29/12
	MCP795W1X	1Mb / 54P	3V SPI Real-Time Clock Calendar with Enhanced Features and Battery Switchover 2011-2012 11/29/11
	MCP79510-IMS	946Kb / 50P	3V SPI Real-Time Clock Calendar with Battery Switchover 11/29/11
	MCP7940NT-I-MNY	1Mb / 42P	Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover 11/29/12
EM Microelectronic - MA...	EM3027-13	1Mb / 28P	Battery Switchover and Trickle Charger

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Аналогичный номер детали - EM3027IDSWS8

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