DS1338 I
2
C RTC with 56-Byte NV RAM
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 0V, T
A
= -40°C to +85°C,
unless otherwise noted. Typical values are at V
BAT
= 3.0V, T
A
= +25°C, unless
otherwise noted.) (Note 1)
PARAMETER
V
BAT
Current (OSC ON); V
BAT
= 3.7V, SQW/OUT OFF (Note 7)
V
BAT
Current (OSC ON); V
BAT
= 3.7V, SQW/OUT ON (32kHz)
(Note 7)
V
BAT
Data-Retention Current (Osc Off); V
BAT
= 3.7V (Note 7)
SYMBOL
I
BATOSC1
I
BATOSC2
I
BATDAT
MIN
TYP
800
1025
10
MAX
1200
1400
100
UNITS
nA
nA
nA
AC ELECTRICAL CHARACTERISTICS
(V
CC
= V
CC(MIN)
to V
CC(MAX)
, T
A
= -40°C to +85°C) (Note 1)
PARAMETER
SCL Clock Frequency
Bus Free Time Between STOP
and START Condition
Hold Time (Repeated) START
Condition (Note 8)
LOW Period of SCL Clock
HIGH Period of SCL Clock
Setup Time for Repeated
START Condition
Data Hold Time (Notes 9, 10)
Data Setup Time (Note 11)
Rise Time of Both SDA and
SCL Signals (Note 12)
Fall Time of Both SDA and
SCL Signals (Note 12)
Setup Time for STOP
Condition
Capacitive Load for Each Bus
Line
I/O Capacitance (SDA, SCL)
Oscillator Stop Flag (OSF)
Delay
SYMBOL
f
SCL
t
BUF
t
HD:STA
t
LOW
t
HIGH
t
SU:STA
t
HD:DAT
t
SU:DAT
t
R
t
F
t
SU:STO
C
B
C
I/O
t
OSF
CONDITION
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
(Note 12)
(Note 13)
(Note 14)
100
MIN
100
0
1.3
4.7
0.6
4.0
1.3
4.7
0.6
4.0
0.6
4.7
0
0
100
250
20 + 0.1C
B
20 + 0.1C
B
20 + 0.1C
B
20 + 0.1C
B
0.6
4.0
400
10
300
1000
300
300
0.9
TYP
MAX
400
100
UNITS
kHz
μs
μs
μs
μs
μs
μs
ns
ns
ns
μs
pF
pF
ms
3 of 16
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
