DS1922E(2008) Просмотр технического описания (PDF) - Maxim Integrated
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DS1922E Datasheet PDF : 44 Pages
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High-Temperature Logger iButton with 8KB
Data-Log Memory
ABSOLUTE MAXIMUM RATINGS
I/O Voltage Range to GND .......................................-0.3V to +6V
I/O Sink Current...................................................................20mA
Operating Temperature Range ........................+15°C to +140°C
Junction Temperature ......................................................+150°C
Storage Temperature Range...........................+15°C to +140°C*
*Storage or operation above +50°C significantly reduces battery life with an upper limit of 300hr cumulative at +140°C.
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.
ELECTRICAL CHARACTERISTICS
(VPUP = 3.0V to 5.25V.)
PARAMETER
SYMBOL
CONDITIONS
Operating Temperature
TA
DS1922E (Note 1)
I/O PIN GENERAL DATA
1-Wire Pullup Resistance
RPUP (Notes 2, 3)
Input Capacitance
CIO
(Note 4)
Input Load Current
IL
I/O pin at VPUP
High-to-Low Switching Threshold
VTL
(Notes 5, 6)
Input Low Voltage
VIL
(Notes 2, 7)
Low-to-High Switching Threshold
VTH (Notes 5, 8)
Switching Hysteresis
VHY
(Note 9)
Output Low Voltage
VOL At 4mA (Note 10)
Standard speed, RPUP = 2.2k
Recovery Time
(Note 2)
tREC
Overdrive speed, RPUP = 2.2k
Overdrive speed, directly prior to reset
pulse; RPUP = 2.2k
Rising-Edge Hold-Off Time
tREH (Note 11)
Standard speed
Time Slot Duration (Note 2)
tSLOT Overdrive speed, VPUP > 4.5V
Overdrive speed (Note 12)
I/O PIN 1-Wire RESET, PRESENCE-DETECT CYCLE
Standard speed, VPUP > 4.5V
Reset Low Time (Note 2)
tRSTL
Standard speed (Note 12)
Overdrive speed, VPUP > 4.5V
Overdrive speed (Note 12)
Presence-Detect High Time
tPDH
Standard speed, VPUP > 4.5V
Standard speed (Note 12)
Overdrive speed (Note 12)
MIN TYP MAX UNITS
+15
+140
°C
2.2
k
100 800
pF
6
10
μA
0.4
3.2
V
0.3
V
0.7
3.4
V
0.09
V
0.4
V
5
2
μs
5
0.6
2.0
μs
65
8
μs
9.5
480
720
690
720
μs
48
80
70
80
15
60
15
63.5
μs
2
7
2 _______________________________________________________________________________________
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