DS2431-A1 Maxim, DS2431-A1 Datasheet - Page 15

• Manufacturer Part Number: DS2431-A1
• Description: The DS2431-A1 is an AEC-Q100 Grade 1 qualified version of the DS2431
• Manufacturer: Maxim

Figure 10. Initialization Procedure: Reset and Presence Pulse
A read-data time slot begins like a write-one time slot.
The voltage on the data line must remain below V
until the read low time t
window, when responding with a 0, the DS2431-A1
starts pulling the data line low; its internal timing gener-
ator determines when this pulldown ends and the volt-
age starts rising again. When responding with a 1, the
DS2431-A1 does not hold the data line low at all, and
the voltage starts rising as soon as t
The sum of t
nal timing generator of the DS2431-A1 on the other side
define the master sampling window (t
t
MSRMAX
), in which the master must perform a read from
V
IHMASTER
V
RL
ILMAX
V
V
PUP
V
0V
TH
TL
+ δ (rise time) on one side and the inter-
______________________________________________________________________________________
t
F
RL
MASTER Tx "RESET PULSE"
is expired. During the t
RESISTOR
RL
Slave-to-Master
is over.
t
RSTL
MSRMIN
for Automotive Applications
RL
TL
to
1024-Bit, 1-Wire EEPROM
ε
MASTER
the data line. For the most reliable communication, t
should be as short as permissible, and the master
should read close to but no later than t
reading from the data line, the master must wait until
t
t
slot. Note that t
gle DS2431-A1 attached to a 1-Wire line. For multidevice
configurations, t
date the additional 1-Wire device input capacitance.
Alternatively, an interface that performs active pullup
during the 1-Wire recovery time such as the DS2482-x00
or DS2480B 1-Wire line drivers can be used.
SLOT
REC
t
PDH
for the DS2431-A1 to get ready for the next time
is expired. This guarantees sufficient recovery time
t
MSP
MASTER Rx "PRESENCE PULSE"
t
PDL
t
REC
RSTH
REC
specified herein applies only to a sin-
should be extended to accommo-
t
REC
DS2431-A1
MSRMAX
. After
15
RL