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Número de pieza
componentes Descripción
PCA9557BS Ver la hoja de datos (PDF) - NXP Semiconductors.
Número de pieza
componentes Descripción
Fabricante
PCA9557BS
8-bit I2C-bus and SMBus I/O port with reset
NXP Semiconductors.
PCA9557BS Datasheet PDF : 26 Pages
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NXP Semiconductors
PCA9557
8-bit I
2
C-bus and SMBus I/O port with reset
data from
shift register
data from
shift register
write configuration
pulse
configuration
register
D
Q
FF
CK Q
write pulse
DQ
FF
CK
output port
register
read pulse
data from
shift register
write polarity
pulse
input port
register
D
Q
FF
CK
polarity inversion
register
D
Q
FF
CK
On power-up or reset, all registers return to default values.
Fig 3. Simplified schematic of IO1 to IO7
output port
register data
V
DD
ESD protection
diode
IO1 to IO7
ESD protection
diode
V
SS
input port
register data
polarity inversion
register data
002aad278
PCA9557
Product data sheet
Rev. 06 — 11 June 2008
© NXP B.V. 2008. All rights reserved.
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