Datasheet

DS1683
Total-Elapsed-Time and Event Recorder with Alarm
3Maxim Integrated
Note 1: All voltages are referenced to ground. Currents entering the IC are specified as positive; currents exiting the IC are specified
as negative.
Note 2: Guaranteed by design.
Note 3: C
B
: Total capacitance of one bus line in pF.
Note 4: EEPROM write time begins after a STOP condition occurs.
Note 5: A decoupling capacitor to supply high instantaneous currents during EEPROM writes is recommended. A typical value is
0.01FF. V
CC
must be maintained above V
CC(MIN)
, including transients, during EEPROM writes.
Note 6: V
CC
must be at or above 2.5V for t
W
after the end of an event to ensure data transfer to the EEPROM.
Note 7: Memory locations to which this specification applies: User Memory, ETC Alarm Limit, Event Counter Alarm Limit,
Configuration, Password Value.
Note 8: Memory locations to which this specification applies: Event Counter register, ETC register.
I
2
C AC ELECTRICAL CHARACTERISTICS
(V
CC
= 2.5V to 5.5V, T
A
= -40NC to +85NC, timing referenced to V
IL(MAX)
and V
IH(MIN)
, unless otherwise noted.) (Figure 7)
NONVOLATILE MEMORY CHARACTERISTICS
(V
CC
= 2.5V to 5.5V, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SCL Clock Frequency f
SCL
400 kHz
Bus Free Time Between STOP
and START Conditions
t
BUF
1.3
Fs
Hold Time (Repeated) START
Condition
t
HD:STA
0.6
Fs
Low Period of SCL t
LOW
1.3
Fs
High Period of SCL t
HIGH
0.6
Fs
Data Hold Time t
HD:DAT
0 0.9
Fs
Data Setup Time t
SU:DAT
100 ns
START Setup Time t
SU:STA
0.6
Fs
SDA and SCL Rise Time t
R
(Note 3)
20 +
0.1C
B
300 ns
SDA and SCL Fall Time t
F
(Note 3)
20 +
0.1C
B
300 ns
STOP Setup Time t
SU:STO
0.6
Fs
SDA and SCL Capacitive
Loading
C
B
(Note 3) 400 pF
EEPROM Write Time t
W
(Notes 4, 5, 6) 10 20 ms
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS
EEPROM Write Cycles
T
A
= +70NC (Note 7)
50,000 Writes
EEPROM Write Cycles (4 Banks)
T
A
= +70NC (Note 8)
200,000 Writes