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±5ppm, I2C Real-Time Clock
3
Maxim Integrated
DS3231M
AC ELECTRICAL CHARACTERISTICS—POWER SWITCH
(TA = -45NC to +85NC, unless otherwise noted.) (Figure 2)
DC ELECTRICAL CHARACTERISTICS—GENERAL (continued)
(VCC = +2.3V to +5.5V, TA = -45NC to +85NC, unless otherwise noted. Typical values are at VCC = +3.3V, VBAT = +3.0V, and TA =
+25NC, unless otherwise noted.)
DC ELECTRICAL CHARACTERISTICS—VBAT CURRENT CONSUMPTION
(VCC = 0V, VBAT = +2.3V to +5.5V, TA = -45NC to +85NC, unless otherwise noted. Typical values are at VCC = 0V, VBAT = +3.0V,
and TA = +25NC, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Power-Fail Voltage
VPF
2.45
2.575
2.70
V
Logic 0 Output
(32KHZ, INT/SQW, SDA)
VOL
IOL = 3mA
0.4
V
Logic 0 Output
(RST)
VOL
IOL = 1mA
0.4
V
Output Leakage
(32KHZ, INT/SQW, SDA)
ILO
-0.1
+0.1
A
Input Leakage
(SCL)
ILI
-0.1
+0.1
A
RST I/O Leakage
IOL
-200
+10
A
VBAT Leakage
IBATLKG
25
100
nA
Temperature Accuracy
TEMPACC VCC or VBAT = +3.3V
Q
3
N
C
Temperature Conversion Time
tCONV
10
ms
Pushbutton Debounce
PBDB
250
ms
Reset Active Time
tRST
250
ms
Oscillator Stop Flag (OSF) Delay
tOSF
(Note 3)
125
200
ms
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Active Battery Current
(I2C Active) (Note 4)
IBATA
VBAT = +3.63V
70
A
VBAT = VBATMAX
150
Timekeeping Battery Current
(I2C Inactive) (Note 4)
IBATT
VBAT = +3.63V, EN32KHZ = 0
2
3.0
A
VBAT = VBATMAX, EN32KHZ = 0
2
3.5
Temperature Conversion Current
(I2C Inactive)
IBATTC
VBAT = +3.63V
575
A
VBAT = VBATMAX
650
Data Retention Current
(Oscillator Stopped and I2C
Inactive)
IBATDR
TA = +25NC
100
nA
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
VCC Fall Time, VPFMAX to
VPFMIN
tVCCF
300
F
s
VCC Rise Time, VPFMIN to
VPFMAX
tVCCR
0
F
s
Recovery at Power-Up
tREC
(Note 5)
250
300
ms
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