4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and

28-Port I/O Expander

_______________________________________________________________________________________

3

Note 2: Guaranteed by design.

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Port Sink Current

2

10

18

mA

Output Short-Circuit Current

Port configured output low, shorted to V+

2.75

11

20.00

mA

V+

≤ 3.3V

1.6

Input High-Voltage SCLK, DIN,

CS

V+ > 3.3V

2

V

Input Low-Voltage SCLK, DIN,

CS

0.6

V

Input Leakage Current SCLK,

DIN,

CS

-50

+50

nA

Output High-Voltage DOUT

V+ -

0.5

V

Output Low-Voltage DOUT

0.4

V

TIMING CHARACTERISTICS (Figure 3)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CLK Clock Period

38.4

ns

CLK Pulse Width High

19

ns

CLK Pulse Width Low

19

ns

CS Fall to SCLK Rise Setup Time

9.5

ns

CLK Rise to

CS Rise Hold Time

0ns

DIN Setup Time

9.5

ns

DIN Hold Time

0ns

Output Data Propagation Delay

21

ns

Minimum

CS Pulse High

19

ns