Extremely Accurate I
2
C-Integrated
RTC/TCXO/Crystal
DS3231
AC ELECTRICAL CHARACTERISTICS
(V
CC
= V
CC(MIN)
to V
CC(MAX)
or V
BAT
= V
BAT(MIN)
to V
BAT(MAX)
, V
BAT
> V
CC
, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Note 1)
PARAMETER
SCL Clock Frequency
Bus Free Time Between STOP
and START Conditions
Hold Time (Repeated) START
Condition (Note 6)
Low Period of SCL Clock
High Period of SCL Clock
Data Hold Time (Notes 7, 8)
Data Setup Time (Note 9)
START Setup Time
Rise Time of Both SDA and SCL
Signals (Note 10)
Fall Time of Both SDA and SCL
Signals (Note 10)
Setup Time for STOP Condition
Capacitive Load for Each Bus
Line (Note 10)
Capacitance for SDA, SCL
Pulse Width of Spikes That Must
Be Suppressed by the Input Filter
Pushbutton Debounce
Reset Active Time
Oscillator Stop Flag (OSF) Delay
Temperature Conversion Time
SYMBOL
f
SCL
t
BUF
t
HD:STA
t
LOW
t
HIGH
t
HD:DAT
t
SU:DAT
t
SU:STA
t
R
t
F
t
SU:STO
C
B
C
I/O
t
SP
PB
DB
t
RST
t
OSF
t
CONV
(Note 11)
10
30
250
250
100
125
200
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
CONDITIONS
MIN
100
0
1.3
4.7
0.6
4.0
1.3
4.7
0.6
4.0
0
0
100
250
0.6
4.7
20 +
0.1C
B
20 +
0.1C
B
0.6
4.7
400
300
1000
300
300
0.9
0.9
TYP
MAX
400
100
UNITS
kHz
μs
μs
μs
μs
μs
ns
μs
ns
ns
μs
pF
pF
ns
ms
ms
ms
ms
POWER-SWITCH CHARACTERISTICS
(T
A
= T
MIN
to T
MAX
)
PARAMETER
V
CC
Fall Time; V
PF(MAX)
to
V
PF(MIN)
V
CC
Rise Time; V
PF(MIN)
to
V
PF(MAX)
Recovery at Power-Up
SYMBOL
t
VCCF
t
VCCR
t
REC
(Note 12)
CONDITIONS
MIN
300
0
250
300
TYP
MAX
UNITS
μs
μs
ms
4
_____________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
