Datasheet

DS2408
3 of 39
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
I/O Pin, 1-Wire Reset, Presence-Detect Cycle
Reset-Low Time
(Notes 1, 12)
t
RSTL
Standard speed, V
PUP
>
4.5V
480 720
µs
Standard speed
660
720
Overdrive speed
53
80
Presence-Detect High
Time (Note 12)
t
PDH
Standard speed
15
60
µs
Overdrive speed
2
7
Presence-Detect Fall
Time (Note 13)
t
FPD
Standard speed, V
PUP
>
4.5V
1 5
µs
Standard speed
1
8
Overdrive speed
1
Presence-Detect Low
Time (Note 12)
t
PDL
Standard speed, V
PUP
>
4.5V
60 240
µs
Standard speed
60
280
Overdrive speed
7
27
Presence-Detect
Sample Time (Note 1)
t
MSP
Standard speed, V
PUP
>
4.5V
65 75
µs
Standard speed
68
75
Overdrive speed
8
9
I/O Pin, 1-Wire Write
Write-0 Low Time
(Notes 1, 12, 14)
t
W0L
Standard speed
60
120
µs
Overdrive speed
8
13
Write-1 Low Time
(Notes 1, 12, 14)
t
W1L
Standard speed
5
15
µs
Overdrive speed
1
1.8
Write Sample Time
(Slave Sampling)
(Note 12)
t
SLS
Standard speed
15
60
µs
Overdrive speed 1.8 8
I/O Pin, 1-Wire Read
Read-Low Time
(Notes 1, 15)
t
RL
Standard speed
5
15 - δ
µs
Overdrive speed
1
1.8 - δ
Read-0 Low Time
(Data From Slave)
(Note 12)
t
SPD
Standard speed
15
60
µs
Overdrive speed 1.8 8
Read-Sample Time
(Notes 1, 12, 15)
t
MSR
Standard speed
t
RL
+ δ
15
µs
Overdrive speed
t
RL
+
δ
1.8
P0 to P7, RSTZ Pin
Input-Low Voltage
V
IL
(Notes 1, 7)
0.30
V
Input-High Voltage V
IH
V
X
= max (V
PUP
,V
CC
)
(Note 1)
V
X
- 0.8 5.25 V
Output-Low Voltage
at 4mA
V
OL
(Note 10) 0.4 V
Leakage Current
I
LP
5.25V at the pin
1
µA
Output Fall Time
t
FPIO
(Notes 4, 16)
100
ns
Minimum-Sensed
PIO Pulse
t
PWMIN
(Notes 4, 17)
1
5 µs