Rainbow Electronics DS1904 - Manual (Page 11)

DS1904
11 of 12
PHYSICAL SPECIFICATION
Size See mechanical drawing
Weight 3.3 grams
Humidity 90% RH at 50°C
Altitude 10000 feet
Expected Service Life 10 years at 25°C
Safety Meets UL#913 (4th Edit.); Intrinsically Safe
Apparatus, Approval under Entity Concept for
use in Class I, Division 1, Group A, B, C and
D Locations (application pending)
ABSOLUTE MAXIMUM RATINGS*
Voltage on 1-Wire 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 abso-
lute maximum rating conditions for extended periods of time may affect reliability.
DC ELECTRICAL CHARACTERISTICS (V
PUP
=2.8V to 6.0V; -40°C to +70°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Logic 1 V
IH
2.2 6.0 V 1
Logic 0 V
IL
-0.3 0.8 V 1,5
Output Logic Low @ 4 mA V
OL
0.4 V 1
Output Logic High V
OH
V
PUP
V 1,2
Input Load Current I
L
5 µA 3
CAPACITANCE (t
A
= 25°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Capacitance 1-Wire C
IN
50 pF
AC ELECTRICAL CHARACTERISTICS (V
PUP
=2.8V to 6.0V; -40°C to +70°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Time Slot t
SLOT
60 120 µs
Write 1 Low Time t
LOW1
1 15 µs
Write 0 Low Time t
LOW0
60 120 µs
Read Low Time t
LOWR
1 15 µs
Read Data Valid t
RDV
exactly 15 µs 7
Release Time t
RELEASE
0 15 45 µs
Read Data Setup t
SU
1 µs 4
Recovery Time t
REC
1 µs
Reset High Time t
RSTH
480 µs
Reset Low Time t
RSTL
480 960 µs 6
Presence Detect High t
PDH
15 60 µs
Presence Detect Low t
PDL
60 240 µs