Datasheet
Table Of Contents
- 1. General description
- 2. Features and benefits
- 3. Ordering information
- 4. Block diagram
- 5. Pinning information
- 6. Functional description
- 7. Characteristics of the I2C-bus
- 8. Application design-in information
- 9. Limiting values
- 10. Thermal characteristics
- 11. Static characteristics
- 12. Dynamic characteristics
- 13. Package outline
- 14. Soldering of SMD packages
- 15. Soldering: PCB footprints
- 16. Abbreviations
- 17. Revision history
- 18. Legal information
- 19. Contact information
- 20. Contents
PCA9543A_43B All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 8 — 3 April 2014 12 of 28
NXP Semiconductors
PCA9543A/43B
2-channel I
2
C-bus switch with interrupt logic and reset
8. Application design-in information
(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
PCA9543A
SD0
SC0
A1
A0
V
SS
SDA
SCL
RESET
V
DD
= 3.3 V
V
DD
= 2.7 V to 5.5 V
I
2
C/SMBus master
002aab184
SDA
SCL
channel 0
V = 2.7 V to 5.5 V
INT INT0
see note
(1)
SD1
SC1
channel 1
V = 2.7 V to 5.5 V
INT1
see note
(1)