DS1923(2009) Просмотр технического описания (PDF) - Maxim Integrated

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DS1923
(Rev.:2009)

Hygrochron Temperature/Humidity Logger iButton with 8KB Data-Log Memory

Maxim Integrated 

Hygrochron Temperature/Humidity Logger

iButton with 8KB Data-Log Memory

ABSOLUTE MAXIMUM RATINGS

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*

*See the Safe Operating Range graph.

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

(VPUP = +3.0V to +5.25V, TA = -20°C to +85°C.)

PARAMETER

SYMBOL

CONDITIONS

IO PIN: GENERAL DATA

1-Wire Pullup Resistance

RPUP (Notes 1, 2)

Input Capacitance

CIO

(Note 3)

Input Load Current

IL

IO pin at VPUP

High-to-Low Switching Threshold

VTL

(Notes 4, 5)

Input Low Voltage

VIL

(Notes 1, 6)

Low-to-High Switching Threshold

Switching Hysteresis

VTH

(Notes 4, 7)

VHY

(Note 8)

Output Low Voltage

Recovery Time

(Note 1)

VOL

tREC

At 4mA (Note 9)

Standard speed, RPUP = 2.2k

Overdrive speed, RPUP = 2.2k

Overdrive speed directly prior to reset

pulse, RPUP = 2.2k

Rising-Edge Hold-Off Time

tREH

(Note 10)

Standard speed

Time-Slot Duration (Note 1)

tSLOT

Overdrive speed, VPUP > 4.5V

Overdrive speed (Note 11)

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

Standard speed, VPUP > 4.5V

Reset Low Time (Note 1)

tRSTL

Standard speed (Note 11)

Overdrive speed, VPUP > 4.5V

Overdrive speed (Note 11)

Presence-Detect High Time

tPDH

Standard speed, VPUP > 4.5V

Standard speed (Note 11)

Overdrive speed (Note 11)

Presence-Detect Fall Time

(Note 12)

Standard speed, VPUP > 4.5V

tFPD Standard speed

Overdrive speed

MIN TYP MAX UNITS

2.2

k

100 800

pF

6

10

μA

0.4

3.2

V

0.3

V

0.7

3.4

V

0.09

N/A

V

0.4

V

5

2

μs

5

0.6

2.0

μs

65

8

μs

9.5

480

720

690

720

μs

48

80

70

80

15

60

15

63.5

μs

2

7

1.5

5

1.5

8

μs

0.15

1

2 _______________________________________________________________________________________

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