DS1904L-F5 Maxim Integrated Products, DS1904L-F5 Datasheet - Page 10

• Manufacturer Part Number: DS1904L-F5
• Description: RTC Ibutton
• Manufacturer: Maxim Integrated Products

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