Datasheet

PCA9500_4 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 04 — 15 April 2009 13 of 26
NXP Semiconductors
PCA9500
8-bit I
2
C-bus and SMBus I/O port with 2-kbit EEPROM
10. Limiting values
GPIO device address configured as 0100 100x for this example.
EEPROM device address configured as 1010 100x for this example.
IO0, IO2, IO3 configured as outputs.
IO1, IO4, IO5 configured as inputs.
IO6, IO7 are not used and must be configured as outputs.
Fig 20. Typical application
PCA9500
IO0
IO1
SCL
SDA
V
DD
MASTER
CONTROLLER
SCL
SDA
10 kΩ
IO2
V
DD
A2
A1
A0
V
DD
V
SS
10 kΩ
(optional)
SUB-SYSTEM 1
(e.g., temp sensor)
IO3
INT
SUB-SYSTEM 2
(e.g., counter)
RESET
controlled
switch
(e.g., CBT device)
V
DD
A
B
enable
SUB-SYSTEM 3
(e.g., alarm system)
ALARM
IO4
IO5
V
SS
IO6
IO7
2 kΩ
10 kΩ
002aae599
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter Conditions Min Max Unit
V
DD
supply voltage −0.5 +4.0 V
V
I
input voltage V
SS
− 0.5 5.5 V
I
I
input current −20 +20 mA
I
O
output current −25 +25 mA
I
DD
supply current −100 +100 mA
I
SS
ground supply current −100 +100 mA
P
tot
total power dissipation - 400 mW
P/out power dissipation per output - 100 mW
T
stg
storage temperature −65 +150 °C
T
amb
ambient temperature operating −40 +85 °C