TCA9517 Datasheet, PDF (10/18 Pages) Texas Instruments – LEVEL-TRANSLATING I2C BUS REPEATER

TCA9517
SCPS242 – DECEMBER 2012
V
CCA
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V
CCB
SDA
SCL
BUS
MASTER
10 kW
10 kW
10 kW
SDAA _SDAB
SCLA _SCLB
TCA9517
EN
10 kW
SDA
SCL
SLAVE
400 kHz
10 kW
SDAA _SDAB
SCLA _SCLB
TCA9517
EN
10 kW
SDA
SCL
SLAVE
400 kHz
10 kW
10 kW
SDAA _SDAB
SDA
SCLA SCLB
TCA9517
EN
SCL
SLAVE
400 kHz
Figure 7. Typical Star Application
Multiple TCA9517 A sides can be connected in a star configuration, allowing all nodes to communicate with each
other.
V
CCB
10 kW
SDA
SCL
BUS
MASTER
10 kW
10 kW
SDAA SDAB
SCLA SCLB
TCA9517
EN
10 kW
10 kW
SDAA SDAB
SCLA SCLB
TCA9517
EN
10 kW
10 kW
SDAA SDAB
SCLA ^SCLB
TCA9517
EN
10 kW
SDA
SCL
SLAVE
400 kHz
Figure 8. Typical Series Application
Multiple TCA9517s can be connected in series as long as the A side is connected to the B side. I²C bus slave
devices can be connected to any of the bus segments. The number of devices that can be connected in series is
limited by repeater delay/time-of-flight considerations on the maximum bus speed requirements.
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