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PCA9654EA Datasheet(PDF) 2 Page - ON Semiconductor

Part # PCA9654EA
Description  8-bit I/O Expander for I2C Bus
Download  22 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

PCA9654EA Datasheet(HTML) 2 Page - ON Semiconductor

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PCA9654E, PCA9654EA
www.onsemi.com
2
BLOCK DIAGRAM
Remark: All I/Os are set to inputs at reset.
Figure 1. Block Diagram
Figure 2. Simplified Schematic of I/Os
At power−on reset, all registers return to default values.
VDD
I/O pin
output port
register data
configuration
register
DQ
CK
Q
data from
shift register
write
configuration
pulse
output port
register
DQ
CK
write pulse
polarity inversion
register
DQ
CK
data from
shift register
write polarity
pulse
input port
register
DQ
CK
read pulse
input port
register data
polarity
inversion
register data
FF
data from
shift register
FF
FF
FF
Q1
Q2
VSS
to INT
100 k
W


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