Data Sheet
Table Of Contents
- 1. General description
- 2. Features
- 3. Applications
- 4. Feature selection
- 5. Ordering information
- 6. Block diagram
- 7. Pinning information
- 8. Functional description
- 9. Application design-in information
- 10. Limiting values
- 11. Characteristics
- 12. Test information
- 13. Package outline
- 14. Soldering
- 15. Abbreviations
- 16. Revision history
- 17. Data sheet status
- 18. Definitions
- 19. Disclaimers
- 20. Trademarks
- 21. Contact information
- 22. Contents
PCA9512A_1 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 01 — 7 October 2005 10 of 22
Philips Semiconductors
PCA9512A
Level shifting hot swappable I
2
C-bus and SMBus bus buffer
Remark: Application assumes bus capacitance within ‘proper operation’ region of Figure 5 and Figure 6.
Fig 8. Hot swapping multiple I/O cards into a backplane using the PCA9512A with a custom connector
002aab792
R4
10 kΩ
C1
0.01 µF
SDAOUT
SCLOUT
ACC
V
CC2
GND
R5
10 kΩ
R6
10 kΩ
V
CC
SDAIN
SCLIN
CARD1_SDA
CARD1_SCL
STAGGERED CONNECTOR
I/O PERIPHERAL CARD 1
BACKPLANE
CONNECTOR
R2
10 kΩ
R1
10 kΩ
V
CC2
BACKPLANE
SDA
SCL
V
CC
R3
5.1 Ω
C2 0.01 µF
PCA9512A
R8
10 kΩ
C3
0.01 µF
SDAOUT
SCLOUT
ACC
V
CC2
GND
R9
10 kΩ
R10
10 kΩ
V
CC
SDAIN
SCLIN
CARD2_SDA
CARD2_SCL
STAGGERED CONNECTOR
I/O PERIPHERAL CARD 2
R7
5.1 Ω
C4 0.01 µF
PCA9512A
Remark: Application assumes bus capacitance within ‘proper operation’ region of Figure 5 and Figure 6.
Fig 9. 5 V to 3.3 V level translator and bus buffer
002aab793
R4
10 kΩ
C2
0.01 µF
SDAOUT
SCLOUT
ACC
V
CC
GND
SDAIN
SCLIN
R1
10 kΩ
V
CC
(5 V)
SDA
SCL
R3
10 kΩ
R2
10 kΩ
CARD_SDA
CARD_SCL
V
CC2
C1
0.01 µF
PCA9512A
CARD_V
CC
(3 V)