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EM3027

EM Microelectronic
Part Number EM3027
Manufacturer EM Microelectronic
Description Real-Time Clock
Published Dec 22, 2020
Detailed Description EM MICROELECTRONIC - MARIN SA EM3027 Real Time Clock with I2C or SPI, Crystal Temperature Compensation, Battery Switch...
Datasheet PDF File EM3027 PDF File

EM3027
EM3027

Overview
EM MICROELECTRONIC - MARIN SA EM3027 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 AutoReload mode.
An interrupt request signal can be provided through INT, and/or IRQ/CLKOUT pins 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 V...


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