DS1922L Ver la hoja de datos (PDF) - Dallas Semiconductor -> Maxim Integrated
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DS1922L Datasheet PDF : 48 Pages
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DS1922L/DS1922T
ABSOLUTE MAXIMUM RATINGS
I/O Voltage to GND
I/O Sink Current
Operating Temperature Range (DS1922L)
Operating Temperature Range (DS1922T)
Junction Temperature
Storage Temperature Range (DS1922L)
Storage Temperature Range (DS1922T)
-0.3V, +6V
20mA
-40°C to +85°C
0°C to +125°C
+150°C
-40°C to +85°C*
0°C to +125°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 the absolute maximum rating conditions for extended periods may affect device.
*Storage or operation above +50°C significantly reduces battery life.
ELECTRICAL CHARACTERISTICS
(VPUP = 3.0V to 5.25V, TA = -40°C to +85°C)
PARAMETER
SYMBOL
CONDITIONS
MIN
I/O Pin General Data
1-Wire Pullup Resistance
RPUP
(Notes 1, 2)
Input Capacitance
CIO
(Note 3)
Input Load Current
IL
I/O pin at VPUP
High-to-Low Switching
Threshold
VTL
(Notes 4, 5)
0.4
Input Low Voltage
VIL
(Notes 1, 6)
Low-to-High Switching
Threshold
VTH
(Notes 4, 7)
0.7
Switching Hysteresis
VHY
(Note 8)
Output Low Voltage
VOL
At 4mA (Note 9)
Standard speed, RPUP = 2.2kW
Recovery Time (Note 1)
tREC
Overdrive speed, RPUP = 2.2kW
Overdrive speed, directly prior to reset
pulse; RPUP = 2.2kW
Rising-Edge Hold-Off Time
tREH
(Note 10)
Standard speed
0.09
5
2
5
0.6
65
Timeslot Duration (Note 1)
tSLOT
Overdrive speed, VPUP > 4.5V
8
Overdrive speed (Note 11)
9.5
I/O Pin, 1-Wire Reset, Presence Detect Cycle
Standard speed, VPUP > 4.5V
480
Reset Low Time (Note 1)
tRSTL
Standard speed (Note 11)
Overdrive speed, VPUP > 4.5V
690
48
Overdrive speed (Note 11)
70
Presence Detect High
Time
Standard speed, VPUP > 4.5V
tPDH
Standard speed (Note 11)
Overdrive speed (Note 11)
15
15
2
Presence Detect Fall Time
(Note 12)
Standard speed, VPUP > 4.5V
tFPD
Standard speed
Overdrive speed
1.5
1.5
0.15
Presence Detect Low
Time
Standard speed, VPUP > 4.5V
60
tPDL
Standard speed (Note 11)
Overdrive speed, VPUP > 4.5V (Note 11)
60
7
Overdrive speed (Note 11)
7
Presence Detect Sample
Time (Note 1)
Standard speed, VPUP > 4.5V
tMSP
Standard speed
Overdrive speed
65
71.5
8
I/O Pin, 1-Wire Write
Standard speed
60
Write-0 Low Time (Note 1)
tW0L
Overdrive Speed, VPUP > 4.5V (Note 11)
6
Overdrive speed (Note 11)
7.5
Write-1 Low Time
(Notes 1, 13)
Standard speed
tW1L
Overdrive speed
5
1
TYP MAX UNITS
2.2
kW
100
800
pF
6
10
µA
3.2
V
0.3
V
3.4
V
N/A
V
0.4
V
µs
2.0
µs
µs
720
720
80
µs
80
60
63.5
µs
7
5
8
µs
1
240
287
24
µs
28
75
75
µs
9
120
12
µs
12
15 - e
1.95 - e
µs
2 of 48
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