Datasheet
DS1621
15 of 16
AC ELECTRICAL CHARACTERISTICS (-55°C to +125°C; V
DD
= 2.7V to 5.5V)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTES
Temperature
Conversion Time
T
TC
750 ms
NV Write Cycle
Time
t
WR
0°C to 70°C 4 10 ms 10
SCL Clock
Frequency
f
SCL
Fast Mode
Standard Mode
0
0
400
100
KHz
Bus Free Time
Between a STOP
and START
Condition
t
BUF
Fast Mode
Standard Mode
1.3
4.7
µs
Hold Time
(Repeated) START
Condition
t
HD:STA
Fast Mode
Standard Mode
0.6
4.0
µs 5
Low Period of SCL
Clock
T
LOW
Fast Mode
Standard Mode
1.3
4.7
µs
High Period of SCL
Clock
T
HIGH
Fast Mode
Standard Mode
0.6
4.0
µs
Setup Time for a
Repeated START
Condition
t
SU:STA
Fast Mode
Standard Mode
0.6
4.7
µs
Data Hold Time t
HD:DAT
Fast Mode
Standard Mode
0
0
0.9 µs 6, 7
Data Setup Time t
SU:DAT
Fast Mode
Standard Mode
100
250
ns 8
Rise Time of Both
SDA and SCL
Signals
t
R
Fast Mode
Standard Mode
20+0.1C
B
300
1000
ns 9
Fall Time of both
SDA and SCL
Signals
t
F
Fast Mode
Standard Mode
20+0.1C
B
300
300
ns 9
Setup time for
STOP Condition
t
SU:STO
Fast Mode
Standard Mode
0.6
4.0
µs
Capacitative Load
for each Bus Line
C
b
400 pF
All values referred to V
IH
=0.9 V
DD
and V
IL
=0.1 V
DD
.
AC ELECTRICAL CHARACTERISTICS (-55°C to +125°C; V
DD
= 2.7V to 5.5V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Capacitance C
I
5 pF