DS1990A

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NOTES:

1. All voltages are referenced to ground.

3. Input load is to ground.

4. An additional reset or communication sequence cannot begin until the reset high time has expired.

5. Read data setup time refers to the time the host must pull the 1-Wire bus low to read a bit. Data is

guaranteed to be valid within 1

µs of this falling edge and will remain valid for 14 µs minimum. (15

µs total from falling edge on 1-Wire bus.)

7. 30 nanocoulombs per 72 time slots @ 5.0V.

9. Capacitance on the I/O pin could be 800 pF when power is first applied. If a 5 k

Ω resistor is used to

µs after power has been applied the parasite capacitance will not affect

normal communications.

µs, to allow interrupt signaling,

otherwise, it could mask or conceal interrupt pulses if this device is used in parallel with a DS1994.