Hygrochron Temperature/Humidity Logger

iButton with 8KB Data-Log Memory

2

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

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.

IO Voltage Range Relative to GND ..........................-0.3V to +6V

IO Sink Current....................................................................20mA

Operating Temperature

and Humidity Range ................-20°C to +85°C, 0 to 100%RH*

Storage Temperature

and Humidity Range ................-40°C to +85°C, 0 to 100%RH*

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

IO PIN: GENERAL DATA

1-Wire Pullup Resistance

(Notes 1, 2)

2.2

k

Input Capacitance

(Note 3)

100

800

pF

Input Load Current

6

10

μA

High-to-Low Switching Threshold

(Notes 4, 5)

0.4

3.2

V

Input Low Voltage

(Notes 1, 6)

0.3

V

Low-to-High Switching Threshold

(Notes 4, 7)

0.7

3.4

V

Switching Hysteresis

(Note 8)

0.09

N/A

V

Output Low Voltage

At 4mA (Note 9)

0.4

V

5

2

Recovery Time

(Note 1)

Overdrive speed directly prior to reset

5

μs

Rising-Edge Hold-Off Time

(Note 10)

0.6

2.0

μs

Standard speed

65

8

Time-Slot Duration (Note 1)

Overdrive speed (Note 11)

9.5

μs

IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE

480

720

Standard speed (Note 11)

690

720

48

80

Reset Low Time (Note 1)

Overdrive speed (Note 11)

70

80

μs

15

60

Standard speed (Note 11)

15

63.5

Presence-Detect High Time

Overdrive speed (Note 11)

2

7

μs

1.5

5

Standard speed

1.5

8

Presence-Detect Fall Time

(Note 12)

Overdrive speed

0.15

1

μs

*See the

Safe Operating Range graph.