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R2045S-E2-FE +BOM

R2045S-E2-FE Real Time Clock Module

Manufacturer:

Nisshinbo Micro Devices Inc
Mfr.Part #:

R2045S-E2-FE
Datasheet:

R2045S-E2-FE Datasheet (PDF)
Programmable:

Not Verified
Type:

Clock/Calendar
Features:

Alarm, Leap Year
Time Format:

HH:MM:SS (12/24 hr)
EDA/CAD Models:

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R2045S-E2-FE General Description

The R2045S/D is a real-time clock module, built in CMOS real-time clock IC and crystal oscillator, connected to the CPU by four signal lines, CE, SCLK, SI, and SO, and configured to perform serial transmission of time and calendar data to the CPU. The oscillation frequency is adjusted to high precision (05ppm: 13 sec. per month at 25C). The periodic interrupt circuit is configured to generate interrupt signals with six selectable interrupts ranging from 0.5 seconds to 1 month. The 2 alarm interrupt circuits generate interrupt signals at preset times. As the oscillation circuit is driven under constant voltage, fluctuation of the oscillator frequency due to supply voltage is small, and the time keeping current is small (TYP. 0.48A at 3V). The oscillation halt sensing circuit can be used to judge the validity of internal data in such events as power-on. The supply voltage monitoring circuit is configured to record a drop in supply voltage below two selectable supply voltage monitoring threshold settings.

Key Features

Built in 32.768kHz crystal unit, The oscillation frequency is adjusted to high precision (05ppm: at 25C)
Time keeping voltage 1.15V to 5.5V
Super low power consumption 0.48A TYP (1.2A MAX) at VDD=3V
Four signal lines (CE, SCLK, SI, and SO) required for connection to the CPU.
Time counters (counting hours, minutes, and seconds) and calendar counters (counting years, months, days,
and weeks) (in BCD format)
Interrupt circuit configured to generate interrupt signals (with interrupts ranging from 0.5 seconds to 1 month)
to the CPU and provided with an interrupt flag and an interrupt halt
2 alarm interrupt circuits (Alarm_W for week, hour, and minute alarm settings and Alarm_D for hour and minute
alarm settings)
32768Hz clock output pin (N-channel open drain output)
With Power-on flag to prove that the power supply starts from 0V
With Oscillation halt sensing Flag to judge the validity of internal data
Supply voltage monitoring circuit with two supply voltage monitoring threshold settings
Automatic identification of leap years up to the year 2099
Selectable 12-hour and 24-hour mode settings
Oscillation adjustment circuit for correcting temperature frequency deviation or offset deviation
Two types of package, SOP14(10.1x7.4x3.1) or SON22(6.1x5.0x1.3)

Specifications

Category	Integrated Circuits (ICs)Clock/TimingReal Time Clocks	Series	-
Programmable	Not Verified	Type	Clock/Calendar
Features	Alarm, Leap Year	Memory Size	-
Time Format	HH:MM:SS (12/24 hr)	Date Format	YY-MM-DD-dd
Interface	3-Wire Serial, 4-Wire Serial	Voltage - Supply	1.7V ~ 5.5V
Voltage - Supply, Battery	-	Current - Timekeeping (Max)	1.8µA ~ 2µA @ 3V ~ 5V
Operating Temperature	-40°C ~ 85°C	Mounting Type	Surface Mount
Base Product Number	R2045