Datasheet

P82B96_8 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 08 — 10 November 2009 10 of 32
NXP Semiconductors
P82B96
Dual bidirectional bus buffer
10. Application information
Refer to AN460 and AN255 for more application detail.
Fig 10. Interfacing an ‘I
2
C’ type of bus with different logic levels
Fig 11. Galvanic isolation of I
2
C-bus nodes via opto-couplers
Fig 12. Long distance I
2
C-bus communications
1
/
2
P82B96
I
2
C-bus
SDA
002aab986
+5 V
+V
CC
(2 V to 15 V)
R1
Rx
(SDA)
Tx
(SDA)
'SDA' (new levels)
1
/
2
P82B96
I
2
C-bus
SDA
002aab987
+5 V
R1
+V
CC
R2
R3
Rx
(SDA)
Tx
(SDA)
R5
R4
+V
CC1
I
2
C-bus
SDA
P82B96
SDA
SCL
002aab988
12 V
12 V3.3 V to 5 V
3.3 V to 5 V
long cables
main enclosure
P82B96
SDA
SCL
3.3 V to 5 V
3.3 V to 5 V
remote control enclosure
12 V