2-wire Serial Interface (I2C Bus)

Product
Name
 Time Keeping
Current
Typ.
Time Keeping
Voltage
Alarm
Function
Perodic
Interupt
Function
32kHz Clock Output Battery
Checker
Clock
Adjust
Function
OSC
Halt
Sensing
Back-up
battery
switch-over
circuit
VD with
DELAY
Function
Others Package Data
Sheet
(PDF)
Switch-over
Threshold/
Detector
Threshold
R2023x 0.45μA
(at 3V)
Typ. 0.66V to 5.50V
Worst.1.0V to 5.5V
 2set
(W/H/M, H/M)
0.5s to
1Month
CMOS output,
with Control pin
1.6V or 1.3V * *       QFN023023-16
TSSOP10G
Download
R2025x 0.48μA
(at 3V)
1.15V to 5.50V 2set
(W/H/M, H/M)
0.5s to
1Month
CMOS output,
with Control pin
2.1V or 1.3V * *     Built-in crystal unit Frequency Deviation (0±5ppm) SOP14
SON22
Download
1.70MB
R2051x 0.40µA
(at 3V)
Typ. 0.75V to 5.50V
Worst.1.0V to 5.5V
2set
(W/H/M, H/M)
0.5s to
1Month
CMOS output,
with Level shifter
2.10V or 1.35V * * * * 2.4V, 2.8V QFN023023-16 Download
2.4V, 2.8V, 4.0V SSOP16
(Register only.
No INTR pin)
(Register only.
No INTR pin)
2.4V TSSOP10G
R2221x 0.3µA *1
(at 3V)
Typ. 0.6V to 5.5V
Worst. 0.9V to 5.5V
2set
(W/H/M, H/M)
0.5s to
1Month
CMOS output,
with Control pin
1.35V * *     ECO mode is set by pin QFN018018-12
TSSOP10G
Download
R2223x ECO mode is set
by register
RS5C372A 0.5µA
(at 3V)
1.3V to 6.0V 2set
(W/H/Mx2)
0.5s to
1Month
Nch Open drain
(Controllable by command)
* *     32768Hz/ 32000Hz
crystal selectable
SSOP8 Download
RS5C372B 1.45V to 6.00V CMOS output
(Controllable by command)
RV5C386A 0.35µA
(at 3V)
1.45V to 5.50V 2set
(W/H/M, H/M)
0.5s to
1Month
CMOS output,
with Control pin
2.1V or 1.6V * *       SSOP10G Download
RV5C387A  0.35µA
(at 3V)   
1.45V to 5.50V   2set
(W/H/M, H/M)
0.5s to
1Month
Nch Open drain
(Controllable by command)
2.1V or 1.6V * *       SSOP10G Download
Product
Name
 Time Keeping
Current
Typ.
Time Keeping
Voltage
Alarm
Function
Perodic
Interupt
Function
32kHz Clock Output Battery
Checker
Clock
Adjust
Function
OSC
Halt
Sensing
Back-up
battery
switch-over
circuit
VD with
DELAY
Function
Others Package Data
Sheet
(PDF)
Switch-over
Threshold/
Detector
Threshold
  • *1 Time keeping current can be reduced in ECO mode.
  • *All PDF files are less than 1MB unless otherwise stated.
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