Manual

DS1904
10 of 12
READ/WRITE TIMING DIAGRAM Figure 9
Write-one Time Slot
15
µ
s
(
OD: 2
µ
s
)
60
µ
s
(
OD: 6
µ
s
)
DS1904
Sam
p
lin
g
V
PULLUP
V
PULLUP MIN
V
IH MIN
V
IL MAX
0V
t
SLOT
t
REC
t
LOW1
60
µ
s
≤
t
SLOT
< 120
1
µ
s
≤
t
LOW1
< 15
µ
s
1
µ
s
≤
t
REC
<
∞
RESISTO
MASTER
Write-zero Time Slot
15µs
RESISTOR
MASTER
(OD: 2µs)
DS1904
60µs
t
LOW0
Sampling Window
(OD: 6µs)
60 µs
≤
t
LOW0
< t
SLOT
< 120 µs
1 µs
≤
t
REC
<
∞
V
PULLUP
V
PULLUP MIN
V
IH MIN
V
IL MAX
0V
t
SLOT
t
REC
Read-data Time Slot
RESISTOR
MASTER
DS1904
Master
Sampling Window
60 µs
≤
t
SLOT
< 120 µs
1 µs
≤
t
LOWR
< 15 µs
0
≤
t
RELEASE
< 45 µs
1 µs
≤
t
REC
<
∞
t
RDV
= 15 µs
t
SU
< 1 µs
V
PULLUP
V
PULLUP MIN
V
IH MIN
V
IL MAX
0V
t
SLOT
t
REC
t
LOWR
t
SU
t
RDV
t
RELEASE