TPT29546A
TPT29546A is 4-channel I2C Switch manufactured by 3PEAK.
Features
- Bidirectional Translator of 1:4 I2C Switch
- Active-Low Reset Input
- Two Address Terminals, Allowing up to Four
Devices on the I2C Bus
- Operating Power-Supply Voltage Range of 2.3 to
5.5V
- Allow Voltage-Level Translation among 2.5V,
3.3V, and 5V Buses
- Support Standard Mode and Fast Mode I2C
Devices，0 to 400 k Hz Clock Frequency
- Low RON Switches
- Latch-Up Performance Exceeds 200 m A per
JESD 78
- ESD Protection Exceeds JESD 22
- ±4000V Human-Body Model
- ±1500V Charged-Device Model
Applications
- Servers/Storages
- Routers (Tele Switching Equipment)
- Factory Automation
- Products with I2C Slave Address Conflicts
(e.g. Multiple, Identical Temp Sensors)
Description
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 bination 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 municate 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 5.5 V tolerant.
TPT29546 is available in the TSSOP16 and SOP16 package, and is characterized from
- 40°C to +85°C.
Typical Application Circuit
.3peak.
1 / 17
Rev. A.0
4-channel I2C Switch with Reset
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