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PCA9554AN Datasheet PDF : 30 Pages
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NXP Semiconductors
PCA9554/PCA9554A
8-bit I2C-bus and SMBus I/O port with interrupt
7. Application design-in information
VDD (5 V)
VDD
MASTER
CONTROLLER
SCL
SDA
INT
VSS
10 kΩ
10 kΩ
10 kΩ
10 kΩ
2 kΩ
VDD
PCA9554
SCL
IO0
SDA
IO1
IO2
INT
IO3
IO4
IO5
IO6
IO7
A2
A1
A0
VSS
Device address conï¬gured as 0100 100X for this example.
IO0, IO1, IO2 conï¬gured as outputs.
IO3, IO4, IO5 conï¬gured as inputs.
IO6 and IO7 are not used and must be conï¬gured as outputs.
Fig 16. Typical application
SUBSYSTEM 1
(e.g., temp. sensor)
INT
RESET
SUBSYSTEM 2
(e.g., counter)
A
enable
controlled switch
(e.g., CBT device)
B
ALARM
SUBSYSTEM 3
(e.g., alarm system)
VDD
002aac496
8. Limiting values
Table 8. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter
Conditions
Min
Max Unit
VDD
II
VI/O
IO(IOn)
IDD
supply voltage
input current
voltage on an input/output pin
output current on pin IOn
supply current
−0.5
+6.0 V
-
±20
mA
VSS − 0.5 5.5
V
-
±50
mA
-
85
mA
ISS
Ptot
Tstg
Tamb
ground supply current
total power dissipation
storage temperature
ambient temperature
operating
-
100
mA
-
200
mW
−65
+150 °C
−40
+85
°C
PCA9554_9554A_7
Product data sheet
Rev. 07 — 13 November 2006
© NXP B.V. 2006. All rights reserved.
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