DS1982 Maxim, DS1982 Datasheet - Page 23

• Manufacturer Part Number: DS1982
• Description: The DS1982 1Kb Add-Only iButton is a rugged read/write data carrier that identifies and stores relevant information about the product or person to which it is attached
• Manufacturer: Maxim

NOTES:
1. All voltages are referenced to ground.
2. V
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
6. V
7. 30 nanocoulombs per 72 time slots @ 5.0V.
8. At V
9. Capacitance on the data pin could be 800 pF when power is first applied. If a 5 k resistor is used to
10. Maximum 1-Wire voltage for programming parameters is 11.5V to 12.0V; temperature range is -40°C
11. Under certain low voltage conditions V
12. The accumulative duration of the programming pulses for each address must not exceed 5 ms.
guaranteed to be valid within 1 s of this falling edge and will remain valid for 14 s minimum. (15
s total from falling edge on 1-Wire bus.)
pull up the data line to V
normal communications.
to +50°C.
guarantee a presence pulse.
PUP
IH
is a function of the external pullup resistor and the pullup voltage.
CC
= external pullup voltage.
=5.0V with a 5 k pullup to V
CC
, 5 ms after power has been applied the parasite capacitance will not affect
CC
ILMAX
and a maximum time slot of 120 s.
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may have to be reduced to as much as 0.5V to always
DS1982