DS1996 Ver la hoja de datos (PDF) - Maxim Integrated

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DS1996

64kbit Memory iButton

Maxim Integrated 

AC ELECTRICAL CHARACTERISTICS OVERDRIVE SPEED

PARAMETER

SYMBOL MIN TYP MAX

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

tSLOT

tLOW1

tLOW0

tRDV

tRELEASE

tSU

tREC

tRSTH

tRSTL

tPDH

tPDL

6

16

1

2

6

16

exactly 2

0

1.5

4

1

1

48

48

80

2

6

8

24

DS1996

(-40°C to 70°C)

UNITS NOTES

µs

µs

µs

µs

µs

µs

5

µs

µs

4

µs

µs

µs

NOTES:

1. All voltages are referenced to ground.

2. VPUP = external pullup voltage.

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.

6. Capacitance on the data contact could be 800 pF when power is first applied. If a 5 kΩ resistor is used

to pullup the data line to VCC, 5 ms after power has been applied, the parasite capacitance will not

affect normal communications.

7. The reset low time (tRSTL) should be restricted to a maximum of 960 µs, to allow interrupt signaling,

otherwise, it could mask or conceal interrupt pulses.

8. VIH is a function of the external pullup resistor and the VCC power supply.

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