DS1990 DALLAS [Dallas Semiconductor], DS1990 Datasheet - Page 9

• Manufacturer Part Number: DS1990
• Description: Serial Number iButton
• Manufacturer: DALLAS [Dallas Semiconductor]

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