DS2401 参数 Datasheet PDF下载

DS2401

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

48-Bit Serial Number

LSB

8-Bit Family Code (01h)

MSB

LSB

DS2401 EQUIVALENT CIRCUIT

Figure 2

BUS MASTER CIRCUIT

Figure 3

A) Open Drain

V

PUP

See note

To data connection

of DS2401

B) Standard TTL

V

PUP

See note

To data connection

of DS2401

Note:

Depending on the 1-Wire communication speed and the bus load characteristics, the optimal pullup

resistor (R

PU

) value will be in the 1.5kΩ to 5kΩ range.

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