TCA4311A Datasheet, PDF (15/22 Pages) Texas Instruments – HOT SWAPPABLE 2-WIRE BUS BUFFERS

www.ti.com
TCA4311A
SCPS226 – JANUARY 2011
V_CC = 5 V
R1 R4
10 k 10 k
SDA1
SCL1
To Other
System 1
Devices
2-Wire System 1
C1
0.01 µF
R5
TCA4311
10 k
V_CC
EN
SDAOUT
SDAIN
SCLOUT
SCLIN
READY
GND
R2 R3
5.1 k 5.1 k
Long
Distance
Bus
2-Wire System 2
C2
0.01 µF
R6
10 k
TCA4311
V_CC
SDAOUT
EN
SCLOUT
SDAIN
READY
SCLIN
GND
V_CC
R7 R8
10 k 10 k
SDA1
SCL1
To Other
System 2
Devices
V_CC (BUS)
SDA
SCL
Figure 14. Repeater/Bus Extender Application
R_DROP
R1 R2
10 k 10 k
V_CC (TCA4311)
C2
0.01 µF
EN
V_CC
SDAIN
SCLIN
TCA4311
GND
SDAOUT
SCLOUT
READY
R3
R4 R5
10 k 10 k 10 k
SDA2
SCL2
Figure 15. System With Disparate V_CC Voltages
V_CC
3.3 V
SCLIN
SDAIN
R1 R2
10 k 10 k
8
3
C1
0.01 µF
2
6
7
1
EN
TCA4311
5
GND ^READY
4
R3 R4
10 k 10 k
SCLOUT
SDAOUT
Input – Output Connection t_PLH
3.5
3.5
3.0
3.0
VXSDAOUT
2.5
2.5
2.0
2.0
Delay: 72.258
1.5
1.5
1.0
1.0
VXSDAIN
0.5
0.5
VXSDAIN
VXSDAOUT
0.0
0.0
–0.5
52.0 52.025 52.075 52.1 52.125 52.15 52.175
t (s)
–0.5
54.0 54.2 54.4 54.6 54.8 55.0 55.2 55.4 55.6 55.8 56.0
t (s)
Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s): TCA4311A
Submit Documentation Feedback
15