DS1923 查看數據表（PDF） - Dallas Semiconductor -> Maxim Integrated

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DS1923

Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory

Dallas Semiconductor -> Maxim Integrated 

DS1923: Hygrochron Temperature/Humidity Logger iButton with 8kB Data log Memory

DS1923 ABSOLUTE MAXIMUM RATINGS

IO Voltage to GND

IO Sink current

Operating Temperature and Humidity Range

Storage Temperature and Humidity Range

-0.3V, +6V

20mA

-20°C to +85°C, 0%RH to 100%RH

(See Safe Operating Range Chart)

-40°C to +85°C, 0%RH to 100%RH

(See Safe Operating Range Chart)

This is a stress rating only and functional operation of the device at these or any other conditions above those

indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating

conditions for extended periods of time may affect reliability.

DS1923 ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

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

CONDITIONS

MIN TYP MAX UNITS

IO Pin General Data

1-Wire Pullup

Resistance

RPUP (Notes 1, 2)

2.2

kW

Input Capacitance

Input Load Current

High-to-Low Switching

Threshold

CIO

(Note 3)

IL

IO pin at VPUP

VTL

(Notes 4. 5)

100 800

pF

6

10

µA

0.4

3.2

V

Input Low Voltage

Low-to-High Switching

Threshold

VIL

(Notes 1, 6)

VTH

(Notes 4, 7)

0.3

V

0.7

3.4

V

Switching Hysteresis

Output Low Voltage

Recovery Time

(Note 1)

Rising-Edge Hold-off

Time

VHY

(Note 8)

VOL

At 4mA (Note 9)

Standard speed, RPUP = 2.2kW

tREC

Overdrive speed, RPUP = 2.2kW

Overdrive speed, directly prior to

reset pulse; RPUP = 2.2kW

tREH

(Note 10)

0.09

5

2

5

0.6

N/A

V

0.4

V

µs

2.0

µs

Timeslot Duration

(Note 1)

tSLOT

Standard speed

Overdrive speed, VPUP > 4.5V

Overdrive speed (Note 11)

65

8

9.5

µs

IO Pin, 1-Wire Reset, Presence Detect Cycle

Reset Low Time

(Note 1)

Standard speed, VPUP > 4.5V

480

tRSTL

Standard speed (Note 11)

Overdrive speed, VPUP > 4.5V

690

48

Overdrive speed (Note 11)

70

720

720

80

µs

80

Presence-Detect High

Time

Standard speed, VPUP > 4.5V

tPDH

Standard speed (Note 11)

15

15

Overdrive speed (Note 11)

2

60

63.5 µs

7

Presence-Detect Fall

Time

(Note 12)

Standard speed, VPUP > 4.5V

tFPD

Standard speed

Overdrive speed

1.5

1.5

0.15

5

8

µs

1

Standard speed, VPUP > 4.5V

60

Presence-Detect Low

Time

Standard speed (Note 11)

tPDL

Overdrive speed, VPUP > 4.5V

(Note 11)

60

7

240

287

24

µs

Overdrive speed (Note 11)

7

28

Presence-Detect

Sample Time

(Note 1)

Standard speed, VPUP > 4.5V

tMSP

Standard speed

Overdrive speed

65

71.5

8

75

75

µs

9

2 of 52

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