DS1990R Maxim, DS1990R Datasheet - Page 8
![no-image](/images/no-image-200.jpg)
DS1990R
Manufacturer Part Number
DS1990R
Description
The DS1990R Serial Number iButton® is a rugged data carrier that serves as an electronic registration number for automatic identification
Manufacturer
Maxim
Datasheet
1.DS1990R.pdf
(10 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DS1990R#F3
Manufacturer:
DALLAS
Quantity:
3 387
Company:
Part Number:
DS1990R#F5
Manufacturer:
DALLAS
Quantity:
326
Company:
Part Number:
DS1990R-F3#
Manufacturer:
Maxim Integrated Products
Quantity:
135
Company:
Part Number:
DS1990R-F5#
Manufacturer:
Maxim Integrated Products
Quantity:
1 799
Serial Number iButton
Figure 7. Read/Write Timing Diagram
8
_______________________________________________________________________________________
WRITE-ONE TIME SLOT
V
WRITE-ZERO TIME SLOT
V
READ-DATA TIME SLOT
V
IHMASTER
IHMASTER
IHMASTER
V
V
V
V
V
V
ILMAX
ILMAX
ILMAX
IHMIN
IHMIN
IHMIN
V
V
V
PUP
PUP
PUP
0V
0V
0V
t
t
t
F
F
F
t
RL
RESISTOR
RESISTOR
RESISTOR
t
W1L
t
MSR
ε
δ
SAMPLING
WINDOW
MASTER
t
W0L
t
t
t
SLOT
SLOT
MASTER
SLOT
MASTER
MASTER
ε
t
REC
t
REC
DS1990R