CAT9554AWI-GT2 ON Semiconductor, CAT9554AWI-GT2 Datasheet - Page 7

• Manufacturer Part Number: CAT9554AWI-GT2
• Description: IC I/O EXPANDER I2C 8B 16SOIC
• Manufacturer: ON Semiconductor

Specifications of CAT9554AWI-GT2

• Interface: I²C, SMBus
• Number Of I /o: 8
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Includes: POR
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 9554AWI-GT2; CAT9554AWI-GT2TR

¯¯¯ : Interrupt Output
The open-drain interrupt output is activated when one
of the port pins configured as an input changes state
(differs from the corresponding input port register bit
state). The interrupt is deactivated when the input
Configuration Pulse
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Characteristics subject to change without notice
INT
Shift Register
Shift Register
Shift Register
Read Pulse
Write Pulse
Data from
Data from
Data from
Register
Polarity
Write
Write
Configuration
C K
D
Register
FF
Q
Q
Figure 4. Simplified Schematic of I/O
C K
D
Output Port
Register
FF
Q
Q
7
returns to its previous state or the input port register is
read. Changing an I/O from an output to an input may
cause a false interrupt if the state of the pin does not
match the contents of the input port register.
Inversion Register
C K
C K
D
D
Input Port
Register
LATCH
Polarity
FF
Q
Q
Q
Q
0
to I/O
Q1
7
Q2
100kΩ
CAT9554, CAT9554A
Doc. No. MD-9002, Rev. F
Output Port
Register Data
I/O
Input Port
Register Data
V CC
V SS
To INT
Polarity
Register Data
0
to I/O
7