Rainbow-electronics DS2404 Bedienungsanleitung PDF herunterladen (Seite 27)

DS2404

27 of 29

CAPACITANCE (t

A

= 25°C)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Input Capacitance C

IN

10 pF

Output Capacitance C

OUT

15 pF

I/O (1-Wire) I

IN/OUT

100 800 pF 8

RESISTANCES (-40°C to +85°C)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

RST Resistance to Ground

Z

RST

65

kW

DQ Resistance to Ground Z

DQ

65

kW

CLK Resistance to Ground Z

CLK

65

kW

AC ELECTRICAL CHARACTERISTICS:

3-WIRE PORT (-40°C to +85°C; V

CC

= 5V+ 10%)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Data to CLK Setup t

DC

35 ns 2

CLK to Data Hold t

CDH

40 ns 2

CLK to Data Delay t

CDD

100 ns 2,3,4

CLK Low Time t

CL

250 ns 2

CLK High Time t

CH

250 ns 2

CLK Frequency t

CLK

DC 2.0 MHz 2

CLK Rise and Fall t

R

,t

F

500 ns 2

RST to CLK Setup

t

CC

1

ms

2

CLK to RST Hold

t

CCH

40 ns 2

RST Inactive Time

t

CWH

250 ns 2

CLK or RST to DQ High Z

t

CDZ

50 ns 2

AC ELECTRICAL CHARACTERISTICS:

1-WIRE PORT (-40°C to +85°C; V

CC

=2.8 to 5.5V)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Time Slot t

SLOT

60 120

ms

Write 1 Low Time t

LOW1

115

ms

23

Write 0 Low Time t

LOW0

60 120

ms

Read Low Time t

LOWR

115

ms

23

Read Data Valid t

RDV

15

ms

22

Release Time t

RELEASE

01545

ms

Read Data Setup t

SU

1

ms

15

Recovery Time t

REC

1

ms

Interrupt t

INT

960 4800

ms

Reset Time High t

RSTH

480

ms

14

Reset Time Low t

RSTL

480 960

ms

20

Presence Detect High t

PDH

15 60

ms

Presence Detect Low t

PDL

60 240

ms

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