2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or

28-Port I/O Expander

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3

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

V+ -

0.7

Output High Voltage

V+ -

0.7

V

Port Sink Current

2

10

18

mA

Output Short-Circuit Current

Port configured output low, shorted to V+

2.75

11

20

mA

Input High-Voltage SDA, SCL,

AD0, AD1

0.7 x

V+

V

Input Low-Voltage SDA, SCL,

AD0, AD1

0.3 x

V+

V

Input Leakage Current SDA, SCL

-50

+50

nA

Input Capacitance

(Note 2)

10

pF

Output Low-Voltage SDA

0.4

V

TIMING CHARACTERISTICS (Figure 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Serial Clock Frequency

400

kHz

Bus Free Time Between a STOP

and a START Condition

1.3

µs

Hold Time (Repeated) START

Condition

0.6

µs

Repeated START Condition

Setup Time

0.6

µs

STOP Condition Setup Time

0.6

µs

Data Hold Time

(Note 3)

15

900

ns

Data Setup Time

100

ns

SCL Clock Low Period

1.3

µs

SCL Clock High Period

0.7

µs

Rise Time of Both SDA and SCL

Signals, Receiving

(Notes 2, 4)

20 +

300

ns

Fall Time of Both SDA and SCL

Signals, Receiving

(Notes 2, 4)

20 +

300

ns

Fall Time of SDA Transmitting

(Notes 2, 5)

20 +

250

ns

Pulse Width of Spike Suppressed

(Notes 2, 6)

0

50

ns

Capacitive Load for Each Bus

Line

(Note 2)

400

pF