DS1992 datasheet(16/17 Pages) MAXIM

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DS1992/DS1993

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Note 1: All voltages are referenced to ground.

Note 2: VIH is a function of the external pullup resistor and the VCC power supply.

Note 3: VPUP = external pullup voltage.

Note 4: Input load is to ground.

Note 5: Capacitance on the data line could be 800pF when power is first applied. If a 5k

Ω resistor is used

to pull up the data line to VPUP, 5µs after power has been applied, the parasite capacitance does not affect

normal communications.

Note 6: Guaranteed by design; not production tested.

Note 7: 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 remains valid for 14µs minimum (15µs total

from falling edge on 1-Wire bus).

Note 8: An additional reset or communication sequence cannot begin until the reset high time has

expired.

Note 9: The reset low time (tRSTL) should be restricted to a maximum of 960µs, to allow interrupt

signaling; otherwise, it could mask or conceal interrupt pulses.

PACKAGE INFORMATION

For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”,

“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the

drawing pertains to the package regardless of RoHS status.

PACKAGE TYPE

PACKAGE CODE

OUTLINE NO.

LAND PATTERN NO.

F5 iButton

IB+5BW

21-0266

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DS1992 Datasheet(PDF) 16 Page - Maxim Integrated Products