Product category:
Frequency Control Components
News Release from: Topline Components | Subject: EM3027/29
Edited by the Electronicstalk Editorial
Team on 22 February 2008
Real-time clock is easy to interface
The EM3027/29 is an ultra-low-power CMOS real-time clock IC with a choice of I2C, SPI or three-wire serial interfaces.
Available now in the UK from Topline Components, the EM3027/29 is an ultra-low-power CMOS real-time clock IC with a choice of I2C, SPI or three-wire serial interfaces The clock is obtained from a 32kHz crystal oscillator, and the frequency is thermally compensated based on temperature measurement and calculation of a correction value
This article was originally published on Electronicstalk on 21 Dec 2004 at 8.00am (UK)
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The temperature can be measured internally or written by an external application to the register.
The chip provides clock and calendar information in BCD format with optional alarms.
The actual contents are latched at the beginning of a transaction and afterwards data are read without clock counter data corruption.
An integrated 16bit timer can run in zero-stop or auto- reload mode.
An interrupt can be provided for events coming from the alarm, timer, voltage detector or digital self-recovery systems.
An integrated trickle charger allows recharging from the main supply voltage through internal resistor(s).
The device operates over a wide 1.3 to 5.5V supply range and requires only 600nA at 5V.
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