S-35399A02 Datasheet, PDF (1/55 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

Rev.1.0_00
2-WIRE REAL-TIME CLOCK
S-35399A02
The S-35399A02 is a CMOS 2-wire real-time clock IC which operates with the very low
current consumption and in the wide range of operation voltage. The operation voltage is 1.3
V to 5.5 V so that this IC can be used for various power supplies from main supply to backup
battery. Due to the 0.34 µA current consumption and wide range of power supply voltage at
time keeping, this IC makes the battery life longer. In the system which operates with a
backup battery, the included free registers can be used as the function for user’s backup
memory. Users always can take back the information in the registers which is stored before
power-off the main power supply, after the voltage is restored.
This IC has the function to correct advance/delay of the clock data speed, in the wide range,
which is caused by the oscillation circuit’s frequency deviation. Correcting according to the
temperature change by combining this function and a temperature sensor, it is possible to
make a high precise clock function which is not affected by the ambient temperature. This IC
has the function for the external microcomputer’s sub clock to output the 32.768 kHz clock
pulse. And for this output, users can select either of Nch open drain or CMOS.
Moreover, this IC has a 24-bit binary up counter. This counter counts up every 60 sec from
power-on so that users are able to grasp the elapsed time from power-on up to 30 years.
„ Features
• Low current consumption :
0.34 µA typ. (V_DD = 3.0 V, Ta = 25°C)
• Wide range of operating voltage :
1.3 to 5.5 V
• Built-in clock-correction function
• Clock pulse output (CMOS output, function to select frequency)
• 32.768 kHz clock pulse output (Nch open-drain, output control pin)
• Built-in 24-bit binary up counter
• Built-in free user register
• 2-wire (I²C-bus) CPU interface
• Built-in alarm interrupter
• Built-in flag generator during detection of low power voltage or at power-on
• Auto calendar up to the year 2099, automatic leap year calculation function
• Built-in constant voltage circuit
• Built-in 32.768 kHz crystal oscillator (C_d built in, C_g external)
• Package : WLP-12A
• Lead-free product
„ Applications
• Mobile game devices
• Mobile AV devices
• Digital still cameras
• Digital video cameras
• Electronic power meters
• DVD recorders
• TVs, VCRs
• Mobile phones, PHS
• Car navigation
„ Package
Package Name
WLP-12A
Package
HA012-A
Drawing Code
Tape
HA012-A
Reel
HA012-A
Seiko Instruments Inc.
1