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ISL12029 Datasheet, PDF (5/28 Pages) Intersil Corporation – Real Time Clock/Calendar with EEPROM
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ISL12029
Watchdog Timer/Low Voltage Reset Parameters
SYMBOL
PARAMETER
CONDITIONS
tRPD
tPURST
VRVALID
VDD Detect to RESET LOW
Power Up Reset Time-Out Delay
Minimum VDD for Valid RESET
Output
VRESET ISL12029-4.5A Reset Voltage Level
ISL12029 Reset Voltage Level
ISL12029-3 Reset Voltage Level
ISL12029-2.7A Reset Voltage Level
ISL12029-2.7 Reset Voltage Level
tWDO Watchdog Timer Period
32.768kHz crystal between X1
and X2
tRST Watchdog Timer Reset Time-Out 32.768kHz crystal between X1
Delay
and X2
tRSP I2C Interface Minimum Restart Time
EEPROM SPECIFICATIONS
EEPROM Endurance
EEPROM Retention
Temperature ≤ +75°C
TYP
MIN (Note 5)
500
100
250
1.0
4.59
4.64
4.33
4.38
3.04
3.09
2.87
2.92
2.58
2.63
1.70
1.75
725
750
225
250
225
250
1.2
>2,000,000
50
MAX
400
4.69
4.43
3.14
2.97
2.68
1.801
775
275
275
UNITS
ns
ms
V
NOTES
9
V
V
V
V
V
s
ms
ms
ms
µs
Cycles
Years
Serial Interface (I2C) Specifications
DC/AC Characteristics
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
VIL
SDA, and SCL Input Buffer LOW SBIB = 1 (Under VDD mode)
-0.3
Voltage
VIH
SDA, and SCL Input Buffer HIGH SBIB = 1 (Under VDD mode)
Voltage
0.7 x VDD
Hysteresis SDA and SCL Input Buffer
Hysteresis
SBIB = 1 (Under VDD mode)
0.05 x VDD
VOL SDA Output Buffer LOW Voltage
ILI
Input Leakage Current on SCL
ILO
I/O Leakage Current on SDA
TIMING CHARACTERISTICS
IOL = 4mA
VIN = 5.5V
VIN = 5.5V
0
0.1
0.1
fSCL SCL Frequency
tIN
Pulse Width Suppression Time at Any pulse narrower than the max
SDA and SCL Inputs
spec is suppressed.
tAA
tBUF
SCL Falling Edge to SDA Output
Data Valid
SCL falling edge crossing 30% of
VDD, until SDA exits the 30% to
70% of VDD window.
Time the Bus Must be Free Before
the Start of a New Transmission
SDA crossing 70% of VDD during
a STOP condition, to SDA
crossing 70% of VDD during the
following START condition.
1300
tLOW Clock LOW Time
Measured at the 30% of VDD
crossing.
1300
MAX
0.3 x VDD
UNITS
V
NOTES
VDD + 0.3
V
V
0.4
V
10
µA
10
µA
400
kHz
50
ns
900
ns
ns
ns
5
FN6206.6
October 18, 2006
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