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DS2740U/T Datasheet(PDF) 15 Page - Dallas Semiconductor

Part # DS2740U/T
Description  High-Precision Coulomb Counter
PDF  15 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS2740U/T Datasheet(HTML) 15 Page - Dallas Semiconductor

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DS2740
15 of 15
Input Logic Low: DQ,
PIO
VIL
(Note 1)
0.6
V
Output Logic Low:
DQ, PIO
VOL
IOL = 4mA (Note 1)
0.4
V
DQ, PIO Input
Pulldown Current
IPD
VDD = 4.2V,
VDQ = 0.4V
0.5
mA
OVD Input Leakage
ILOVD
PIO bit = 1
-1
1
mA
DQ Capacitance
CDQ
50
pF
DQ Low to Sleep Time
tSLEEP
(Note 3)
2.0
2.4
s
ELECTRICAL CHARACTERISTICS: 1-WIRE INTERFACE—STANDARD
SPEED
(2.7V
£ VDD £ 5.5V; TA = -20°C to +70°C.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Time Slot
tSLOT
60
120
ms
Recovery Time
tREC
1
ms
Write 0 Low Time
tLOW0
60
120
ms
Write 1 Low Time
tLOW1
115
ms
Read Data Valid
tRDV
15
ms
Reset Time High
tRSTH
480
ms
Reset Time Low
tRSTL
480
960
ms
Presence Detect High
tPDH
15
60
ms
Presence Detect Low
tPDL
60
240
ms
ELECTRICAL CHARACTERISTICS: 1-WIRE INTERFACE—OVERDRIVE
SPEED
(2.7V
£ VDD £ 5.5V; TA = -20°C to +70°C.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Time Slot
tSLOT
616
ms
Recovery Time
tREC
1
ms
Write 0 Low Time
tLOW0
616
ms
Write 1 Low Time
tLOW1
12
ms
Read Data Valid
tRDV
2
ms
Reset Time High
tRSTH
48
ms
Reset Time Low
tRSTL
48
80
ms
Presence Detect High
tPDH
26
ms
Presence Detect Low
tPDL
824
ms
Note 1:
All voltages are referenced to VSS.
Note 2:
Offset performance requires proper circuit layout design free of surface contaminants.
Note 3:
The DS2740 enters the sleep mode 2.0s to 2.4s after DQ goes low.



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