Datasheet

±5ppm, I
2
C Real-Time Clock
3Maxim Integrated
DS3231M
AC ELECTRICAL CHARACTERISTICS—POWER SWITCH
(T
A
= -45NC to +85NC, unless otherwise noted.) (Figure 2)
DC ELECTRICAL CHARACTERISTICS—GENERAL (continued)
(V
CC
= +2.3V to +5.5V, T
A
= -45NC to +85NC, unless otherwise noted. Typical values are at V
CC
= +3.3V, V
BAT
= +3.0V, and T
A
=
+25NC, unless otherwise noted.)
DC ELECTRICAL CHARACTERISTICS—V
BAT
CURRENT CONSUMPTION
(V
CC
= 0V, V
BAT
= +2.3V to +5.5V, T
A
= -45NC to +85NC, unless otherwise noted. Typical values are at V
CC
= 0V, V
BAT
= +3.0V,
and T
A
= +25NC, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Power-Fail Voltage V
PF
2.45 2.575 2.70 V
Logic 0 Output
(32KHZ, INT/SQW, SDA)
V
OL
I
OL
= 3mA 0.4 V
Logic 0 Output
(RST)
V
OL
I
OL
= 1mA 0.4 V
Output Leakage
(32KHZ, INT/SQW, SDA)
I
LO
-0.1 +0.1 µA
Input Leakage
(SCL)
I
LI
-0.1 +0.1 µA
RST I/O Leakage
I
OL
-200 +10 µA
V
BAT
Leakage I
BATLKG
25 100 nA
Temperature Accuracy TEMP
ACC
V
CC
or V
BAT
= +3.3V
Q3 NC
Temperature Conversion Time t
CONV
10 ms
Pushbutton Debounce PB
DB
250 ms
Reset Active Time t
RST
250 ms
Oscillator Stop Flag (OSF) Delay t
OSF
(Note 3) 125 200 ms
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Active Battery Current
(I
2
C Active) (Note 4)
I
BATA
V
BAT
= +3.63V 70
µA
V
BAT
= V
BATMAX
150
Timekeeping Battery Current
(I
2
C Inactive) (Note 4)
I
BATT
V
BAT
= +3.63V, EN32KHZ = 0 2 3.0
µA
V
BAT
= V
BATMAX
, EN32KHZ = 0 2 3.5
Temperature Conversion Current
(I
2
C Inactive)
I
BATTC
V
BAT
= +3.63V 575
µA
V
BAT
= V
BATMAX
650
Data Retention Current
(Oscillator Stopped and I
2
C
Inactive)
I
BATDR
T
A
= +25NC
100 nA
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
CC
Fall Time, V
PFMAX
to
V
PFMIN
t
VCCF
300
Fs
V
CC
Rise Time, V
PFMIN
to
V
PFMAX
t
VCCR
0
Fs
Recovery at Power-Up t
REC
(Note 5) 250 300 ms