Rainbow Electronics DS1855 - Manual (Page 14)

DS1855
14 of 20
AC ELECTRICAL CHARACTERISTICS (-40°C to +85°C, V
CC
= 2.7V to 5.5V)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTES
SCL Clock Frequency f
SCL
Fast Mode
Standard Mode
0
0 400
100 kHz 4
Bus Free Time Between
STOP and START t
BUF
Fast Mode
Standard Mode
1.3
4.7 ms 4
Hold Time (repeated)
START Condition t
HD:STA
Fast Mode
Standard Mode
0.6
4.0 ms 4,5
Low Period of SCL
Clock t
LOW
Fast Mode
Standard Mode
1.3
4.7 ms 4
High Period of SCL
Clock t
HIGH
Fast Mode
Standard Mode
0.6
4.0 ms 4
Data Hold Time t
HD:DAT
Fast Mode
Standard Mode
0
0 0.9
0.9 ms 4,6
Data Set-Up Time t
SU:DAT
Fast Mode
Standard Mode
100
250 ns 4
Start Set-Up Time t
SU:STA
Fast Mode
Standard Mode
0.6
4.7 ms 4
Rise Time of Both SDA
and SCL Signals t
R
Fast Mode
Standard Mode
20+0.1CB
300
1000
ns 4
Fall Time of Both SDA
and SCL Signals t
F
Fast Mode
Standard Mode
20+0.1CB
300
300 ns 7
Set-Up Time for STOP
Condition t
SU:STO
Fast Mode
Standard Mode
0.6
4.0 ms
Capacitive Load for
Each Bus Line C
B
400 pF 7
EEPROM Write Time T
W
2.5 10 ms 8
NONVOLATILE MEMORY CHARACTERISTICS
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS
Writes +85 ° C 50,000