Datasheet

PCA6408A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 1 — 27 September 2012 5 of 40
NXP Semiconductors
PCA6408A
Low-voltage, 8-bit I
2
C-bus and SMBus I/O expander
5.2 Pin description
[1] All I/O are configured as input at power-on.
Table 3. Pin description
Symbol Pin Description
TSSOP16 HVQFN16 XQFN16
V
DD(I2C-bus)
1 15 15 Supply voltage of I
2
C-bus. Connect directly to
the V
DD
of the external I
2
C master. Provides
voltage-level translation.
ADDR 2 16 16 Address input. Connect directly to V
DD(P)
or
ground.
RESET
3 1 1 Active LOW reset input. Connect to V
DD(I2C-bus)
through a pull-up resistor if no active connection
is used.
P0
[1]
4 2 2 Port P input/output 0.
P1
[1]
5 3 3 Port P input/output 1.
P2
[1]
6 4 4 Port P input/output 2.
P3
[1]
7 5 5 Port P input/output 3.
V
SS
8 6 6 Ground.
P4
[1]
9 7 7 Port P input/output 4.
P5
[1]
10 8 8 Port P input/output 5.
P6
[1]
11 9 9 Port P input/output 6.
P7
[1]
12 10 10 Port P input/output 7.
INT
13 11 11 Interrupt output. Connect to V
DD(I2C-bus)
through
a pull-up resistor.
SCL 14 12 12 Serial clock bus. Connect to V
DD(I2C-bus)
through
a pull-up resistor.
SDA 15 13 13 Serial data bus. Connect to V
DD(I2C-bus)
through
a pull-up resistor.
V
DD(P)
16 14 14 Supply voltage of PCA6408A for Port P.