DS620 Datasheet, PDF (4/15 Pages) Dallas Semiconductor – Low-Voltage, +-0.5°C Accuracy Digital Thermometer and Thermostat

DS620 Digital Thermometer and Thermostat
AC ELECTRICAL CHARACTERISTICS
EEPROM AC Electrical Characteristics
PARAMETER
EEPROM Write Cycle Time
EEPROM Writes
EEPROM Data Retention
SYMBOL
T_WR
N_EEWR
t_EEDR
CONDITIONS
-40°C to +85°C
-40°C ≤ T_A ≤ +85°C
(Note 1)
T_A = +25°C (Note 1)
-40°C to +125°C (Note 2)
2-Wire AC Electrical Characteristics
PARAMETER
SCL Frequency
Bus Free Time Between a
STOP and START Condition
START and Repeat START
Hold Time from Falling SCL
Low Period of SCL
High Period of SCL
Repeated START Condition
Setup Time to Rising SCL
Data-Out Hold Time from
Falling SCL
Data-In Setup Time to Rising
SCL
SYMBOL
f_SCL
t_BUF
t_HD:STA
t_LOW
t_HIGH
t_SU:STA
t_HD:DAT
t_SU:DAT
Rise Time of SDA and SCL
t_R
CONDITIONS
(Note 3, 4)
(Note 3)
(Note 3)
(Note 3)
(Note 3)
(Note 3)
(Note 3, 5)
Fall Time of SDA and SCL
STOP Setup Time to Rising
SCL
Capacitive Load for Each BUS
Line
Input Capacitance
Spike Pulse Width that can be
Suppressed by Input Filter
t_F
T_SU:STO
C_B
C_I
(Note 3, 5)
Note 1: VDD must be 2.0V to 3.5V.
Note 2: Write done at 25°C.
Note 3: All values referenced to 0.9 VDD and 0.1 VDD.
Note 4: After this period the first clock pulse is generated.
Note 5: For example, if CB = 300pF, then tR(MIN) = tF(MIN) = 50ns.
MIN
10k
40k
10
MIN
0
1.3
0.6
1.3
0.6
0.6
0
100
20 +
0.1xC_B
20 +
0.1xC_B
0.6
0
TYP
20k
80k
TYP
10
MAX
10
MAX
400
0.9
1000
300
400
50
UNITS
ms
writes
years
UNITS
KHz
µs
µs
µs
µs
µs
µs
ns
ns
ns
µs
pF
pF
ns
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