DS2482-100_12 MAXIM [Maxim Integrated Products], DS2482-100_12 Datasheet - Page 22

• Manufacturer Part Number: DS2482-100_12
• Description: Single-Channel 1-Wire Master
• Manufacturer: MAXIM [Maxim Integrated Products]

Single-Channel 1-Wire Master
reduced bus capacitance of 300pF is acceptable for
pullup voltages of 4V and lower. For fast speed operation
at any pullup voltage, the bus capacitance must not
Figure 10. Application Schematic
Figure 11. I
22
______________________________________________________________________________________
2
C Fast Mode Pullup Resistor Selection Chart
2000
1600
1200
800
400
0
1
*R
P
= I
2
C PULLUP RESISTOR (SEE THE APPLICATIONS INFORMATION SECTION FOR R
μC
(I
2
C PORT)
MINIMUM R
2
P
V
CC
R
P
*
PULLUP VOLTAGE (V)
SDA
SCL
AD0
AD1
SDA
SCL
AD0
AD1
3
DS2482-100
DS2482-100
V
CC
exceed 200pF. The corresponding pullup resistor value
at the voltage is indicated by the “MINIMUM R
PCTLZ
PCTLZ
IO
IO
P
SIZING).
4
MAX LOAD AT MIN R
1-Wire LINE
1-Wire LINE
CURRENT-LIMITING
RESISTOR
REFER TO APPLICATION
NOTE 4206
V
CC
(WITH SPECIAL POWER
DEVICE #2
1-Wire DEVICE #1
1-Wire
REQUIREMENTS)
P
FAST MODE
5
500
400
300
200
100
0
P
” line.