DS1994

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PHYSICAL SPECIFICATIONS

Size

See mechanical drawing

Weight

3.3 grams (F5 package)

Expected Service Life

10 years at 25

C

Safety

Meets UL#913 (4th Edit.); Intrinsically Safe Apparatus,

Approved under Entity Concept for use in Class I,

Division 1, Group A, B, C, and D Locations

ABSOLUTE MAXIMUM RATINGS*

Voltage on any Pin Relative to Ground

-0.5V to +7.0V

Operating Temperature

-40

C to +70C

Storage Temperature

-40

C to +70C

* 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.

DC ELECTRICAL CHARACTERISTICS

(-40°C to +70°C)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

1-Wire Pullup Voltage

2.8

6.0

V

1, 2

Logic 1

2.2

V

1

Logic 0

-0.3

+0.8

V

1

Output Logic Low at 4mA

0.4

V

1

Input Load Current

5

A

3

CAPACITANCE

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

I/O (1-Wire)

100

800

pF

6, 8

AC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Time Slot

60

120

s

Write 1 Low Time

1

15

s

Write 0 Low Time

60

120

s

Read Data Valid

exactly 15

s

Release Time

0

15

45

s

Read Data Setup

1

s

5

Interrupt

960

4800

s

Recovery Time

1

s

Reset Time High

480

s

4

Reset Time Low

480

960

s

7

Presence Detect High

15

60

s

Presence Detect Low

60

240

s