Datasheet
1-Wire Digital Thermometer with
Sequence Detect and PIO
DS28EA00
2 Maxim Integrated
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(T
A
= -40°C to +85°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IO Voltage Range to GND ........................................-0.5V to +6V
IO Sink Current....................................................................20mA
Maximum PIOA or PIOB Pin Current...................................20mA
Maximum Current Through GND Pin ..................................40mA
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature...........................Refer to the IPC/JEDEC
J-STD-020 Specification.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLY
Supply Voltage V
DD
(Note 2) 3.0 5.5 V
Supply Current (Note 3) I
DD
V
DD
= +5.5V 1.5 mA
Standby Current I
DDS
V
DD
= +5.5V 1.5 μA
IO PIN: GENERAL DATA
Local power 3.0 V
DD
1-Wire Pullup Voltage (Note 2) V
PUP
Parasite power 3.0 5.5
V
1-Wire Pullup Resistance R
PUP
(Notes 2, 4) 0.3 2.2 k
Input Capacitance C
IO
(Notes 3, 5) 1000 pF
Input Load Current I
L
IO pin at V
PUP
0.1 1.5 μA
High-to-Low Switching Threshold V
TL
(Notes 3, 6, 7) 0.46
V
PUP
-
1.9V
V
Parasite powered 0.5
Input Low Voltage (Notes 2, 8) V
IL
V
DD
powered (Note 3) 0.7
V
Low-to-High Switching Threshold
(Notes 3, 6, 9)
V
TH
Parasite power 1.0
V
PUP
-
1.1V
V
Switching Hysteresis
(Notes 3, 6, 10)
V
HY
Parasite power 0.21 1.7 V
Output Low Voltage (Note 11) V
OL
At 4mA 0.4 V
Standard speed, R
PUP
= 2.2k 5
Overdrive speed, R
PUP
= 2.2k 2
Recovery Time
(Notes 2, 12)
t
REC
Overdrive speed, directly prior to reset
pulse; R
PUP
= 2.2k
5
μs
Standard speed 0.5 5.0
Rising-Edge Hold-Off Time
(Notes 3, 13)
t
REH
Overdrive speed Not applicable (0)
μs
Standard speed 65
Time-Slot Duration
(Notes 2, 14)
t
SLOT
Overdrive speed 8
μs
IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE
Standard speed 480 640
Reset Low Time (Note 2) t
RSTL
Overdrive speed 48 80
μs