DS1482 View Datasheet(PDF) - Dallas Semiconductor -> Maxim Integrated

Part Name

Description

Manufacturer

DS1482

1-Wire Level Shifter and Line Driver with Load Sensor

Dallas Semiconductor -> Maxim Integrated 

Point 1:

Point 2:

Point 3:

Point 4:

DS1482

The 1-Wire slave device starts drawing current (internal micro or numeric processor is

running). The strong pullup (SPU) must be activated before the high current phase begins.

The 1-Wire slave device no longer draws current. After the deglitching time (tCF) is over, the

DONE signal turns high. The START signal must be activated no later than tSD before tCF is

over. Typically START is activated shortly after SPU, but not before the 1-Wire slave device

has started drawing high current.

As soon as the DONE signal is high, the host micro ends the strong pullup by changing SPU

to low.

While the DONE signal is high, the host micro changes START to low; this may occur

simultaneously with the state change of SPU or later. When START changes to low, DONE

becomes low.

Figure 5. Timing References TXD to I/O

TXD

I/O

tTI

tFIO

0.7 x VCCQ

0.2 x VCCQ

tTI

0.9 x VCC

0.1 x VCC

Figure 6. Timing References I/O to RXD

I/O

tIR

RXD

tF

0.7 x VCC

0.2 x VCC

tIR

0.9 x VCCQ

0.1 x VCCQ

tR

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