DS1996 Maxim, DS1996 Datasheet - Page 18

• Manufacturer Part Number: DS1996
• Description: The DS1996 Memory iButton is a rugged read/write data carrier that acts as a localized database that can be easily accessed with minimal hardware
• Manufacturer: Maxim

AC ELECTRICAL CHARACTERISTICS: OVERDRIVE SPEED
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
5. Capacitance on the data contact could be 800 pF when power is first applied. If a 5 kΩ resistor is used
6. The reset low time (t
7. V
PARAMETER
Time Slot
Write 1 Low Time
Write 0 Low Time
Read Data Valid
Release Time
Read Data Setup
Recovery Time
Reset Time High
Reset Time Low
Presence Detect High
Presence Detect Low
guaranteed to be valid within 1 µs of this falling edge.
to pullup the data line to V
affect normal communications.
otherwise, it could mask or conceal interrupt pulses.
IH
is a function of the external pullup resistor and the V
RSTL
) should be restricted to a maximum of 960 µs, to allow interrupt signaling,
CC
, 5 ms after power has been applied, the parasite capacitance will not
SYMBOL
t
RELEASE
t
t
t
t
t
t
t
LOW1
LOW0
t
t
SLOT
RSTH
RSTL
t
RDV
PDH
REC
PDL
SU
18 of 19
MIN
48
48
6
1
6
0
1
2
7
CC
exactly 2
TYP
1.5
power supply.
MAX
16
16
80
24
2
4
1
6
UNITS
(-40°C to 70°C)
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
NOTES
DS1996
4
3