RV-4162 Datasheet, PDF (6/39 Pages) MICORO CRYSTAL SWITZERLAND – Ultra Small Real Time Clock

Micro Crystal
Ultra Small Real Time Clock / Calendar Module
2.1. PINOUT
C7 Package:
#8
#1
#5 #2
#3
#4
SDA
CLKOUT
V_SS
N.C.
4162
RV-4162
#8
SCL
#7
N.C.
#6
INT
#5
V_DD
#1
#4
2.2. PIN DESCRIPTION
Symbol
SDA
CLKOUT
VSS
N.C.
VDD
INT
N.C.
SCL
Pin #
1
2
3
4
5
6
7
8
Description
Serial Data; open-drain; requires pull-up resistor
Clock Output
Ground
Not Connected
Power Supply Voltage
Interrupt Output; open-drain; requires pull-up resistor; active low
Not Connected
Serial Clock Input; requires pull-up resistor
2.3. FUNCTIONAL DESCRIPTION
The RV-4162 is a low power CMOS Real-Time Clock / Calendar module with built-in “Tuning-Fork” crystal with the
nominal frequency of 32.768 kHz; no external components are required for the oscillator circuitry.
The oscillator frequency on all devices is tested not to exceed a time deviation of ± 20 ppm (parts per million) at
25°C, which equates to about ± 52 seconds per month.
This time accuracy can be further improved to ± 2 ppm at 25°C or better by individually measuring the frequency-
deviation in the application and programming a correction value into the frequency compensation register.
The CMOS IC contains 16 8-bit RAM registers; the address counter is automatically incremented after each written
or read data byte. All sixteen registers are designed as addressable 8-bit parallel registers, although, not all bits are
implemented.
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