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AC ELECTRICAL CHARACTERISTICS: OVERDRIVE SPEED
PARAMETER SYMBOL MIN TYP MAX
Time Slot t SLOT 6 16
Write 1 Low Time t LOW1 1 2
Write 0 Low Time t LOW0 6 16
Read Data Valid t RDV exactly 2
Release Time t RELEASE 0 1.5 4
Read Data Setup t SU 1
Recovery Time t REC 1
Reset Time High t RSTH 48
Reset Time Low t RSTL 48 80
Presence Detect High t PDH 2 6
Presence Detect Low t PDL 7 24
DS1996
(-40°C to 70°C)
UNITS NOTES
μs
μs
μs
μs
μs
μs 4
μs
μs 3
μs
μs
μs
NOTES:
1. All voltages are referenced to ground.
2. Input load is to ground.
3. An additional reset or communication sequence cannot begin until the reset high time has expired.
4. 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 μ s of this falling edge.
5. Capacitance on the data contact could be 800 pF when power is first applied. If a 5 k ? resistor is used
to pullup the data line to V CC , 5 ms after power has been applied, the parasite capacitance will not
affect normal communications.
6. The reset low time (t RSTL ) should be restricted to a maximum of 960 μs, to allow interrupt signaling,
otherwise, it could mask or conceal interrupt pulses.
7. V IH is a function of the external pullup resistor and the V CC power supply.
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