Datasheet

DS28EC20: 20Kb 1-Wire EEPROM
2 of 27
ABSOLUTE MAXIMUM RATINGS
I/O Voltage to GND
-0.5V, +6V
I/O 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 (soldering, 10s)
+300°C
Soldering Temperature (reflow)
TO-92
+250°C
TSOC
+260°C
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 the absolute maximum rating conditions for extended periods may affect device reliability.
5.0V SUPPLY ELECTRICAL CHARACTERISTICS
(V
PUP
= 5.0V ±5%, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
I/O PIN GENERAL DATA
1-Wire Pullup Resistance
R
PUP
(Notes 2, 3)
0.3
2.2
k
Ω
Input Capacitance
C
IO
(Notes 4, 5)
2000
pF
Input Load Current
I
L
I/O pin at V
PUP
0.05
3.5
µA
High-to-Low Switching
Threshold
V
TL
(Notes 5, 6, 7) 1.6
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) 2.5
V
PUP
-
1.1
V
Switching Hysteresis
V
HY
(Notes 5, 6, 10)
0.30
1.30
V
Output Low Voltage
V
OL
At 4mA (Note 11)
0.20
V
Recovery Time
(Notes 2, 12)
t
REC
Standard speed
5
µs
Overdrive speed
5
Rising-Edge Hold-off Time
(Notes 5, 13)
t
REH
Standard speed
0.5
5.0
µs
Overdrive speed
Not applicable (0)
Timeslot Duration
(Notes 2, 14)
t
SLOT
Standard speed
65
µs
Overdrive speed
11
I/O PIN, 1-Wire RESET, PRESENCE DETECT CYCLE
Reset-Low Time (Note 2) t
RSTL
Standard speed
480
640
µs
Overdrive speed
48
80
Presence-Detect High
Time
t
PDH
Standard speed
15
60
µs
Overdrive speed
2
6
Presence-Detect Low
Time
t
PDL
Standard speed
60
240
µs
Overdrive speed
8
24
Presence-Detect Sample
Time (Notes 2, 15)
t
MSP
Standard speed
60
75
µs
Overdrive speed
6
10
I/O PIN, 1-Wire WRITE
Write-0 Low Time
(Notes 2, 16, 17)
t
W0L
Standard speed
60
120
µs
Overdrive speed
6
15.5
Write-1 Low Time
(Notes 2, 17)
t
W1L
Standard speed
1
15
µs
Overdrive speed
1
2
I/O PIN, 1-Wire READ
Read-Low Time
(Notes 2, 18)
t
RL
Standard speed
5
15 -
δ
µs
Overdrive speed
0.800
2 -
δ
Read-Sample Time
(Notes 2, 18)
t
MSR
Standard speed
t
RL
+
δ
15
µs
Overdrive speed
t
RL
+
δ
2.27