Rainbow Electronics DS28EA00 - Manual (Page 2)

DS28EA00 1-Wire Digital Thermometer with Sequence Detect and PIO
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ABSOLUTE MAXIMUM RATINGS
IO Voltage to GND -0.5V, +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 -40°C to +85°C
Soldering Temperature See IPC/JEDEC J-STD-020
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 the absolute maximum rating conditions for extended periods may affect device.
ELECTRICAL CHARACTERISTICS
(T
A
= -40°C to +85°C; see Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Power Supply
Supply Voltage V
DD
(Note 2) 3.0 5.5 V
Supply Current (Note 5) 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, 3) 0.3 2.2 k
Ω
Input Capacitance C
IO
(Notes 4, 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 5, 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 5) 0.7
V
Low-to-High Switching
Threshold (Notes 5, 6, 9)
V
TH
Parasite power 1.0
V
PUP
-
1.1V
V
Switching Hysteresis
(Notes 5, 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
Ω
5
Overdrive speed, R
PUP
= 2.2k
Ω
2 Recovery Time
(Notes 2, 12)
t
REC
Overdrive speed, directly prior to reset
pulse; R
PUP
= 2.2k
Ω
5
µs
Standard speed 0.5 5.0 Rising-Edge Hold-Off Time
(Notes 5, 13)
t
REH
Overdrive speed Not applicable (0)
µs
Standard speed 65 Timeslot 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
Standard speed 15 60 Presence-Detect High
Time
t
PDH
Overdrive speed 2 6
µs
Standard speed 1.125 8.1 Presence-Detect Fall Time
(Notes 5, 15)
t
FPD
Overdrive speed 0 1.3
µs
Standard speed 60 240 Presence-Detect Low
Time
t
PDL
Overdrive speed 8 24
µs
Standard speed 68.1 75 Presence-Detect Sample
Time (Notes 2,16)
t
MSP
Overdrive speed 7.3 10
µs