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DS2401_11 Datasheet - Page 3

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The idle state for the 1-Wire bus is high. If, for any reason, a transaction needs to be suspended, the bus
MUST be left in the idle state if the transaction is to resume. If this does not occur and the bus is left low
for more than 120µs, one or more of the devices on the bus may be reset.
DS2401 MEMORY MAP Figure 1
8-Bit CRC Code
MSB
LSB MSB
DS2401 EQUIVALENT CIRCUIT Figure 2
BUS MASTER CIRCUIT Figure 3
Note:
Depending on the 1-Wire communication speed and the bus load characteristics, the optimal pullup
resistor (R
) value will be in the 1.5kΩ to 5kΩ range.
PU
48-Bit Serial Number
LSB
A) Open Drain
V
PUP
See note
To data connection
of DS2401
B) Standard TTL
V
PUP
See note
8-Bit Family Code (01h)
MSB
LSB
To data connection
of DS2401

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