DS1922E(2008) 查看數據表（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
ELECTRICAL CHARACTERISTICS (continued)
(VPUP = 3.0V to 5.25V.)
PARAMETER
Presence-Detect Fall Time
(Note 13)
Presence-Detect Low Time
Presence-Detect Sample Time
(Note 2)
I/O PIN 1-Wire WRITE
Write-Zero Low Time
(Notes 2, 14)
Write-One Low Time
(Notes 2, 14)
I/O PIN 1-Wire READ
Read Low Time
(Notes 2, 15)
Read Sample Time
(Notes 2, 15)
REAL-TIME CLOCK (RTC)
SYMBOL
tFPD
tPDL
tMSP
CONDITIONS
Standard speed, VPUP > 4.5V
Standard speed
Overdrive speed
Standard speed, VPUP > 4.5V
Standard speed (Note 12)
Overdrive speed, VPUP > 4.5V (Note 12)
Overdrive speed (Note 12)
Standard speed, VPUP > 4.5V
Standard speed
Overdrive speed
tW0L
tW1L
Standard speed
Overdrive speed, VPUP > 4.5V (Note 12)
Overdrive speed (Note 12)
Standard speed
Overdrive speed
tRL
tMSR
Standard speed
Overdrive speed
Standard speed
Overdrive speed
Accuracy
Frequency Deviation
TEMPERATURE CONVERTER
Conversion Time
(Note 16)
Thermal Response Time
Constant (Note 17)
Conversion Error (Notes 18, 19)
Temperature Cycles
Operating Lifetime
F
0°C to +125°C
tCONV
RESP
NTCY
tLIFE
8-bit mode
16-bit mode (11 bits)
iButton package
+15°C to +110°C (Note 20)
+110°C to +140°C
Cycle = ramp from +25°C to > +125°C
and back to +25°C (Note 21)
Temperature > +125°C (Note 21)
MIN TYP MAX UNITS
1.5
5
1.5
8
μs
0.15
1
60
240
60
287
μs
7
24
7
28
65
75
71.5
75
μs
8
9
60
120
6
12
μs
7.5
12
5
15
μs
1
1.95
5
1
tRL +
tRL +
15 -
μs
1.95 -
15
μs
1.95
See the RTC Accuracy
graph
-600
+60
Min/
Month
ppm
30
75
ms
240
600
130
s
±7
°C
-1.5
+1.5
300 Cycles
300 Hours
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