Rainbow-electronics MAX7359 Manual de usuario descargar pdf (Pagina 3)

MAX7359

2-Wire Interfaced Low-EMI

Key Switch Controller/GPO

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C TIMING CHARACTERISTICS

= 1.62V to 3.6V, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V

= 2.5V, T

= +25°C.) (Notes 1, 2) (Figure 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Capacitance

(SCL, SDA, AD0)

(Notes 3, 4) 10 pF

SCL Serial-Clock Frequency f

SCL

Bus timeout disabled 0 400 kHz

Bus Free Time Between a STOP

and a START Condition

BUF

1.3 µs

Hold Time (Repeated) START

Condition

STA

0.6 µs

Repeated START Condition

Setup Time

STA

0.6 µs

STOP Condition Setup Time t

STO

0.6 µs

Data Hold Time t

DAT

(Note 5) 0.9 µs

Data Setup Time t

DAT

100 ns

SCL Clock Low Period t

LOW

1.3 µs

SCL Clock High Period t

HIGH

0.7 µs

Rise Time of Both SDA and SCL

Signals, Receiving

(Notes 3, 4)

20 +

0.1C

300 ns

Fall Time of Both SDA and SCL

Signals, Receiving

(Notes 3, 4)

20 +

0.1C

300 ns

Fall Time of SDA Transmitting t

F.TX

(Notes 3, 6)

20 +

0.1C

250 ns

Pulse Width of Spike Suppressed t

(Notes 3, 7) 50 ns

C ap aci ti ve Load for E ach Bus Li ne C

(Note 3) 400 pF

Note 1: All parameters are tested at T

= +25°C. Specifications over temperature are guaranteed by design.

Note 2: All digital inputs at V

or GND.

Note 3: Guaranteed by design.

Note 4: C

= total capacitance of one bus line in pF. t

and t

measured between 0.8V and 2.1V.

Note 5: A master device must provide a hold time of at least 300ns for the SDA signal (referred to V

of the SCL signal) to bridge

the undefined region of SCL’s falling edge.

Note 6: I

SINK

≤ 6mA. C

= total capacitance of one bus line in pF. t

and t

measured between 0.8V and 2.1V.

Note 7: Input filters on the SDA, SCL, and AD0 inputs suppress noise spikes less than 50ns.

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Rainbow-electronics MAX7359 Manual de usuario Pagina 3

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