Datasheet
DS2431
1024-Bit, 1-Wire EEPROM
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(T
A
= -40°C to +85°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IO Voltage Range to GND .......................................-0.5V to +6V
IO Sink Current ...................................................................20mA
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-55°C to +125°C
Lead Temperature (excluding UCSP, soldering, 10s).....+300°C
Soldering Temperature (reflow)
TO-92 ............................................................................+250°C
AIl other packages, excluding SFN ..............................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
IO PIN: GENERAL DATA
1-Wire Pullup Voltage V
PUP
(Note 2) 2.8 5.25 V
1-Wire Pullup Resistance R
PUP
(Notes 2, 3) 0.3 2.2 k
Input Capacitance C
IO
(Notes 4, 5) 1000 pF
Input Load Current I
L
IO pin at V
PUP
0.05 6.7 µA
High-to-Low Switching Threshold V
TL
(Notes 5, 6, 7) 0.5
V
PUP
-
1.8
V
Input Low Voltage V
IL
(Notes 2, 8) 0.5 V
Low-to-High Switching Threshold V
TH
(Notes 5, 6, 9) 1.0
V
PUP
-
1.0
V
Switching Hysteresis V
HY
(Notes 5, 6, 10) 0.21 1.70 V
Output Low Voltage V
OL
At 4mA (Note 11) 0.4 V
Standard speed, R
PUP
= 2.2k 5
Overdrive speed, R
PUP
= 2.2k 2
Recovery Time
(Notes 2,12)
t
REC
Overdrive speed, directly prior to reset
pulse; R
PUP
= 2.2k
5
µs
Standard speed 0.5 5.0
Rising-Edge Hold-Off Time
(Notes 5, 13)
t
REH
Overdrive speed Not applicable (0)
µs
Standard speed 65
Time Slot Duration
(Notes 2, 14)
t
SLOT
Overdrive speed 8
µs
IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE
Standard speed 480 640
Reset Low Time (Note 2) t
RSTL
Overdrive speed 48 80
µs
Standard speed 15 60
Presence-Detect High Time t
PDH
Overdrive speed 2 6
µs
Standard speed 60 240
Presence-Detect Low Time t
PDL
Overdrive speed 8 24
µs
Standard speed 60 75
Presence-Detect Sample Time
(Notes 2, 15)
t
MSP
Overdrive speed 6 10
µs