Datasheet

PCA9555_8 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 08 — 22 October 2009 19 of 34
NXP Semiconductors
PCA9555
16-bit I
2
C-bus and SMBus I/O port with interrupt
[2] Each I/O must be externally limited to a maximum of 25 mA and each octal (IO0_0 to IO0_7 and IO1_0 to IO1_7) must be limited to a
maximum current of 100 mA for a device total of 200 mA.
[3] The total current sourced by all I/Os must be limited to 160 mA.
(1) I
OH
= −8mA
(2) I
OH
= −10 mA
(1) I
OH
= −8mA
(2) I
OH
= −10 mA
Fig 20. V
OH
maximum Fig 21. V
OH
minimum
V
DD
= 5.5 V; V
I/O
= 5.5 V; A2, A1, A0 set to logic 0.
(1) T
amb
= −40 °C
(2) T
amb
= +25 °C
(3) T
amb
= +85 °C
Fig 22. I
DD
versus number of I/Os held LOW
2.0
5.0
4.0
3.0
6.0
V
OH
(V)
V
DD
(V)
2.7 5.53.6
002aac706
(1)
(2)
2.5
3.5
4.5
V
OH
(V)
1.5
V
DD
(V)
2.3 4.753.0
002aac707
(1)
(2)
0
1.2
0.8
0.4
1.6
I
DD
(mA)
number of I/Os
002aac705
all 1s all 0sone 0 three 0s
(1)
(2)
(3)