DS1923 Maxim, DS1923 Datasheet - Page 2

• Manufacturer Part Number: DS1923
• Description: The DS1923 temperature/humidity logger iButton® is a rugged, self-sufficient system that measures temperature and/or humidity and records the result in a protected memory section
• Manufacturer: Maxim

Hygrochron Temperature/Humidity Logger
iButton with 8KB Data-Log Memory
ABSOLUTE MAXIMUM RATINGS
IO Voltage Range Relative to GND ..........................-0.3V to +6V
IO Sink Current....................................................................20mA
ELECTRICAL CHARACTERISTICS
(V
*See the Safe Operating Range graph.
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.
2
IO PIN: GENERAL DATA
1-Wire Pullup Resistance
Input Capacitance
Input Load Current
High-to-Low Switching Threshold
Input Low Voltage
Low-to-High Switching Threshold
Switching Hysteresis
Output Low Voltage
Recovery Time
(Note 1)
Rising-Edge Hold-Off Time
Time-Slot Duration (Note 1)
IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE
Reset Low Time (Note 1)
Presence-Detect High Time
Presence-Detect Fall Time
(Note 12)
PUP
_______________________________________________________________________________________
= +3.0V to +5.25V, T
PARAMETER
A
= -20°C to +85°C.) (Note 31)
SYMBOL
R
t
t
t
t
t
SLOT
t
C
V
V
RSTL
V
V
REC
REH
PDH
V
FPD
PUP
I
TH
HY
OL
IO
TL
L
IL
(Notes 1, 2)
(Note 3)
IO pin at V
(Notes 4, 5)
(Notes 1, 6)
(Notes 4, 7)
(Note 8)
At 4mA (Note 9)
Standard speed, R
Overdrive speed, R
Overdrive speed directly prior to reset
pulse, R
(Note 10)
Standard speed
Overdrive speed, V
Overdrive speed (Note 11)
Standard speed, V
Standard speed (Note 11)
Overdrive speed, V
Overdrive speed (Note 11)
Standard speed, V
Standard speed (Note 11)
Overdrive speed (Note 11)
Standard speed, V
Standard speed
Overdrive speed
PUP
PUP
= 2.2k
CONDITIONS
PUP
PUP
PUP
PUP
PUP
PUP
Operating Temperature
Storage Temperature
PUP
and Humidity Range ................-20°C to +85°C, 0 to 100%RH*
and Humidity Range ................-40°C to +85°C, 0 to 100%RH*
> 4.5V
> 4.5V
> 4.5V
= 2.2k
> 4.5V
> 4.5V
= 2.2k
0.09
0.15
MIN
480
690
0.4
0.7
0.6
9.5
1.5
1.5
65
48
70
15
15
5
2
5
8
2
TYP
100
6
MAX
63.5
800
N/A
720
720
2.2
3.2
0.3
3.4
0.4
2.0
10
80
80
60
7
5
8
1
UNITS
k
pF
μA
μs
μs
μs
μs
μs
μs
V
V
V
V
V