DS1990A
ABSOLUTE MAXIMUM RATINGS*
Voltage on any Pin Relative to Ground
Operating Temperature
Storage Temperature
∗
-0.5V to +7.0V
-40°C to +85°C
-55°C to +125°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
Logic 1
Logic 0
Output Logic Low @ 4 mA
Output Logic High
Input Load Current
Operating Charge
SYMBOL
V
IH
V
OL
V
OL
V
OH
I
L
Q
OP
MIN
2.2
-0.3
(V
PUP
=2.8V to 6.0V; -40°C to +85°C)
TYP
MAX
V
CC
+0.3
+0.8
0.4
6.0
30
UNITS
V
V
V
V
µA
nC
NOTES
1,6
1
1
1,2
3
7,8
V
PUP
5
CAPACITANCE
PARAMETER
I/O (1-Wire)
SYMBOL
C
IN/OUT
MIN
TYP
100
MAX
800
UNITS
pF
(TA = 25°C)
NOTES
9
AC ELECTRICAL CHARACTERISTICS
PARAMETER
Time Slot
Write 1 Low Time
Write 0 Low Time
Read Data Valid
Release Time
Read Data Setup
Recovery Time
Reset Time High
Reset Time Low
Presence Detect High
Presence Detect Low
SYMBOL
t
SLOT
t
LOW1
t
LOW0
t
RDV
t
RELEASE
t
SU
t
REC
t
RSTH
t
RSTL
t
PDH
t
PDL
MIN
60
1
60
0
1
480
480
15
60
(V
PUP
=2.8V to 6.0V; -40°C to +85°C)
TYP
MAX
120
15
120
45
1
UNITS
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
NOTES
exactly 15
15
5
4
10
60
240
9 of 10
DALLAS [ DALLAS SEMICONDUCTOR ]
