Overview
The TPT29546 is a 1:4 bidirectional translating I2C switch. The SCL/SDA upstream pair fans out to four downstream channels. Any single SCn/SDn channel or combination of channels can be selected, determined by the programmable control register.
If one of the downstream I2C buses is stuck in a low state, then an active-low reset (RESET) input helps the TPT29546 to recover. Pulling RESET low resets the I2C state machine and causes all the channels to be deselected, as does the internal power-on reset function.
The pass gates of the switches are constructed such that the VCC terminal can be used to limit the maximum high voltage, which will be passed by the TPT29546. This allows the use of different bus voltages on each pair, so that 2.5V, or 3.3V parts can communicate with 5V parts, without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O terminals are 5.5V tolerant.
TPT29546 is available in the TSSOP16 and SOP16 package, and is characterized from –40°C to +85°C.
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Status
Production
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Rating
Industrial
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Drivers Per Package
1
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Receivers Per Package
4
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VCC(Min)(V)
2.5
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VCC(Max)(V)
5.5
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Data Rate(Max)(kBPS)
400
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ICC (Max)(mA)
0.03
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ESD HBM(kV)
3.5
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IEC-61000-4-2 Contact(kV)
/
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Operating Temperature Range(℃)
-40 to +85
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Package
TSSOP20
