DS1994

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PHYSICAL SPECIFICATIONS

Size

See mechanical drawing

Weight

3.3 grams (F5 package)

Humidity

90% RH at 50

°C

Altitude

10,000 feet

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

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

Logic 1 (Note 1)

2.2

V

Logic 0 (Note 1)

-0.3

+0.8

V

Output Logic Low at 4mA

(Note 1)

0.4

V

Output Logic High (Notes 1,

2)

V

Input Load Current (Note 3)

5

mA

CAPACITANCE

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

I/O (1-Wire) (Notes 6, 8)

100

800

pF

AC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

Time Slot

60

120

ms

Write 1 Low Time

115

ms

Write 0 Low Time

60

120

ms

Read Data Valid

exactly 15

ms

Release Time

015

45

ms

Read Data Setup (Note 5)

1

ms

Interrupt

960

4800

ms

Recovery Time

1

ms

Reset Time High (Note 4)

480

ms