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產品資訊 > RICOH > Real-time clock ICs - 2-wire Serial Interface(I2C Bus)
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
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
2 Sets
(W/H/M, H/M)
0.5s to
1Month
CMOS Output,
with Control Pin
1.6V or 1.3V N N   QFN023023-16
TSSOP10G
DL
R2025x 0.48μA
(at 3V)
1.15V to 5.50V 2 Sets
(W/H/M, H/M)
0.5s to
1Month
CMOS Output,
with Control Pin
2.1V or 1.3V N N Built-in Crystal Unit,
Frequency Deviation (0±5ppm)
SOP14
SON22
DL
1.70MB
R2051x 0.40µA
(at 3V)
Typ. 0.75V to 5.50V
Worst.1.0V to 5.5V
2 Sets
(W/H/M, H/M)
0.5s to
1Month
CMOS Output,
with Level Shifter
2.10V or 1.35V Y Y 2.4V, 2.8V QFN023023-16 DL
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
2 Sets
(W/H/M, H/M)
0.5s to
1Month
CMOS Output,
with Control Pin
1.35V N N ECO mode is set by ECO Pin. QFN018018-12
TSSOP10G
DL
R2223x ECO mode is set by a Register.
RS5C372A 0.5µA
(at 3V)
1.3V to 6.0V 2 Sets
(W/H/Mx2)
0.5s to
1Month
Nch Open Drain Output
(Controllable by Command)
N N 32768Hz/ 32000Hz
Crystal Selectable
SSOP8 DL
RS5C372B 1.45V to 6.00V CMOS Output
(Controllable by Command)
RV5C386A 0.35µA
(at 3V)
1.45V to 5.50V 2 Sets
(W/H/M, H/M)
0.5s to
1Month
CMOS Output,
with Control Pin
2.1V or 1.6V N N   SSOP10G DL
RV5C387A 0.35µA
(at 3V)
1.45V to 5.50V 2 Sets
(W/H/M, H/M)
0.5s to
1Month
Nch Open Drain Output
(Controllable by Command)
2.1V or 1.6V N N   SSOP10G DL
Product
Name
Time Keeping
Current
Typ.
Time Keeping
Voltage
Alarm
Function
Perodic
Interupt
Function
32kHz Clock Output Battery
Checker
Back-up
battery
switch-over
circuit
VD with
DELAY
Function
Others Package Data
Sheet
(PDF)
Switch-over
Threshold/
Detector
Threshold

Tap to see the table

  • *1Time keeping current can be reduced in ECO mode.