PCA9544A_09 Datasheet, PDF (12/26 Pages) NXP Semiconductors – 4-channel I2C-bus multiplexer with interrupt logic

NXP Semiconductors
PCA9544A
4-channel I²C-bus multiplexer with interrupt logic
8. Application design-in information
V_DD = 2.7 V to 5.5 V
SDA
SCL
I²C-bus/SMBus master
V_DD = 3.3 V
SDA
SCL
INT
SD0
SC0
INT0
PCA9544A
SD1
SC1
INT1
SD2
SC2
INT2
A2
A1
SD3
A0
SC3
V_SS
INT3
002aae298
V = 2.7 V to 5.5 V
(1)
channel 0
V = 2.7 V to 5.5 V
(1)
channel 1
V = 2.7 V to 5.5 V
(1)
channel 2
V = 2.7 V to 5.5 V
(1)
channel 3
(1) If the device generating the interrupt has an open-drain output structure or can be 3-stated,
a pull-up resistor is required.
If the device generating the interrupt has a totem pole output structure and cannot be 3-stated,
a pull-up resistor is not required.
The interrupt inputs should not be left floating.
Fig 14. Typical application
PCA9544A_4
Product data sheet
Rev. 04 — 15 June 2009
© NXP B.V. 2009. All rights reserved.
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