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DS1338 I2C RTC with 56-Byte NV RAM
3 of 16
DC ELECTRICAL CHARACTERISTICS
(
VCC = 0V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VBAT = 3.0V, TA = +25°C, unless
otherwise noted.) (Note 1)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
VBAT Current (OSC ON); VBAT = 3.7V, SQW/OUT OFF (Note 7)
IBATOSC1
800
1200
nA
VBAT Current (OSC ON); VBAT = 3.7V, SQW/OUT ON (32kHz)
(Note 7)
IBATOSC2
1025
1400
nA
VBAT Data-Retention Current (Osc Off); VBAT = 3.7V (Note 7)
IBATDAT
10
100
nA
AC ELECTRICAL CHARACTERISTICS
(VCC = VCC(MIN) to VCC(MAX), TA = -40°C to +85°C) (Note 1)
PARAMETER
SYMBOL
CONDITION
MIN
TYP
MAX
UNITS
SCL Clock Frequency
fSCL
Fast mode
100
400
kHz
Standard mode
0
100
Bus Free Time Between STOP
and START Condition
tBUF
Fast mode
1.3
s
Standard mode
4.7
Hold Time (Repeated) START
Condition (Note 8)
tHD:STA
Fast mode
0.6
s
Standard mode
4.0
LOW Period of SCL Clock
tLOW
Fast mode
1.3
s
Standard mode
4.7
HIGH Period of SCL Clock
tHIGH
Fast mode
0.6
s
Standard mode
4.0
Setup Time for Repeated
START Condition
tSU:STA
Fast mode
0.6
s
Standard mode
4.7
Data Hold Time (Notes 9, 10)
tHD:DAT
Fast mode
0
0.9
s
Standard mode
0
Data Setup Time (Note 11)
tSU:DAT
Fast mode
100
ns
Standard mode
250
Rise Time of Both SDA and
SCL Signals (Note 12)
tR
Fast mode
20 + 0.1CB
300
ns
Standard mode
20 + 0.1CB
1000
Fall Time of Both SDA and
SCL Signals (Note 12)
tF
Fast mode
20 + 0.1CB
300
ns
Standard mode
20 + 0.1CB
300
Setup Time for STOP
Condition
tSU:STO
Fast mode
0.6
s
Standard mode
4.0
Capacitive Load for Each Bus
Line
CB
(Note 12)
400
pF
I/O Capacitance (SDA, SCL)
CI/O
(Note 13)
10
pF
Oscillator Stop Flag (OSF)
Delay
tOSF
(Note 14)
100
ms
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