LTC4314

14

4314f

Figure 7. LTC4314s Configured 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

shelf manager can have as many LTC4314s as required

depending on the number of boards in the system and

the desired radial/star configuration. 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

3.3V

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

LTC4314 #6

GND

3.3V

SDAOUT1

SDAOUT2

SDAOUT3

SDAOUT4

SDAIN

ENABLE1

ENABLE2

ENABLE3

ENABLE4

ACC

ENABLE21A

ENABLE22A

ENABLE23A

ENABLE24A

R3

10k

3.3V

IPMB-A (×24)

IPMB-B (×24)

IPMB-B (×24)

IPMB-B

SDA24

SDA24

SDA1