Datasheet

LTC4314
14
4314f
Figure 7. LTC4314s Confi gured for a Radially Connected Redundant Telecommunications Shelf Manager Application
in a 6 × 4 Arrangement. The ENABLE Pins on Only One of the Shelf Managers Are High at Any Time. Only the SDA
Path Is Shown for Simplicity
APPLICATIONS INFORMATION
Radial Telecommunications
Figure 7 shows the use of the LTC4314 in a radial telecom-
munications application. Two shelf managers are wired to
communicate with slave I
2
C devices for redundancy. Each
shelf manager can have as many LTC4314s as required
depending on the number of boards in the system and
the desired radial/star confi guration. The ENABLE pins of
the LTC4314s inside only one shelf manager are asserted
high at any time. For simplicity, in Figure 7 only the SDA
pathway is shown. The SCL pathway is identical.
LTC4314 #1
GND
V
CC
3.3V
V
CC2
SHMC #1
SHMC #2
(IDENTICAL TO SHMC#1)
4314 F07
SDAOUT1
SDAOUT2
SDAOUT3
SDAOUT4
SDAIN
ENABLE1
ENABLE2
ENABLE3
ENABLE4
ACC
ENABLE1A
ENABLE2A
ENABLE3A
ENABLE4A
μP
R1
10k
BACKPLANE
IPMB-A
SDA1
IPMB-A
SDA24
IPMB-B
SDA1
SDA24
SDA1
FRU #1
FRU #24
3.3V
R2
10k
3.3V
ttt
ttt
ttt
LTC4314 #6
GND
V
CC
3.3V
V
CC2
SDAOUT1
SDAOUT2
SDAOUT3
SDAOUT4
SDAIN
ENABLE1
ENABLE2
ENABLE3
ENABLE4
ACC
ENABLE21A
ENABLE22A
ENABLE23A
ENABLE24A
R3
10k
3.3V
ttt
IPMB-A (×24)
IPMB-B (×24)
IPMB-B (×24)
IPMB-B
SDA24
ttt
SDA24
SDA1
ttt