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1024-Bit EEPROM iButton
ABSOLUTE MAXIMUM RATINGS
IO Voltage Range to GND .......................................-0.5V to +6V
IO Sink Current ...................................................................20mA
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-55°C to +125°C
Operating Temperature Range ...........................-40°C to +85°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
(T A = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
IO PIN: GENERAL DATA
1-Wire Pullup Voltage
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
V PUP
R PUP
C IO
I L
V TL
V IL
V TH
V HY
V OL
(Note 2)
(Notes 2, 3)
(Notes 4, 5)
IO pin at V PUP
(Notes 5, 6, 7)
(Notes 2, 8)
(Notes 5, 6, 9)
(Notes 5, 6, 10)
At 4mA (Note 11)
2.8
0.3
0.05
0.5
1.0
0.21
5.25
2.2
1000
6.7
V PUP -
1.8
0.5
V PUP -
1.0
1.70
0.4
V
k
pF
μA
V
V
V
V
V
Standard speed, R PUP = 2.2k
5
Recovery Time
(Notes 2, 12)
Rising-Edge Hold-Off Time
(Notes 5, 13)
Time Slot Duration
(Notes 2, 14)
t REC
t REH
t SLOT
Overdrive speed, R PUP = 2.2k
Overdrive speed, directly prior to reset
pulse; R PUP = 2.2k
Standard speed
Overdrive speed
Standard speed
Overdrive speed
2
5
0.5 5.0
Not applicable (0)
65
8
μs
μs
μs
IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE
Reset Low Time (Note 2)
Presence-Detect High Time
Presence-Detect Low Time
Presence-Detect Sample Time
(Notes 2, 15)
t RSTL
t PDH
t PDL
t MSP
Standard speed
Overdrive speed
Standard speed
Overdrive speed
Standard speed
Overdrive speed
Standard speed
Overdrive speed
480
48
15
2
60
8
60
6
640
80
60
6
240
24
75
10
μs
μs
μs
μs
2
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