DS2401 Maxim, DS2401 Datasheet - Page 3

• Manufacturer Part Number: DS2401
• Description: The DS2401 enhanced Silicon Serial Number is a low-cost, electronic registration number that provides an absolutely unique identity which can be determined with a minimal electronic interface (typically, a single port pin of a microcontroller)
• Manufacturer: Maxim

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 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
DS2401 MEMORY MAP Figure 1
MSB
8-Bit CRC Code
PU
) value will be in the 1.5kΩ to 5kΩ range.
LSB MSB
48-Bit Serial Number
A) Open Drain
B) Standard TTL
3 of 11
V
V
PUP
PUP
See note
LSB
To data connection
of DS2401
See note
MSB
To data connection
of DS2401
8-Bit Family Code (01h)
LSB