The MAX7357EUG+ from Maxim Integrated Products is a 1 to 8 I2C bus switch/multiplexer with bus lock-up detection, isolation and notification 24 pin TSSOP package. This 8-channel device expands the main I2C bus to any combination of 8 extended I2C buses. It enables a master on main bus to isolate and communicate with devices or groups of devices that may otherwise have slave address conflicts. The MAX7357 feature an enhanced mode that includes a built-in timer used to monitor all extended buses for lock-up conditions If clock or data line of any of these buses is low for more than 25ms, a lock condition is detected. An optional interrupt can be generated through bidirectional active-low RST/active-low INT. Any device connected to an I2C bus can transmit and receive signals, however, only master connected to host side of MAX7357 should address the device. It is used in servers, RAID, base stations, control and automation devices, SFP control interface, networking equipment.
Supply voltage range is 2.3V to 3.6V (3.3 supply), 4.5V to 5.5V (5V supply)
Operating temperature range from -40°C to 85°C, bus lock-up detection and isolation
Enhanced mode, preconnection wiggle test (enhanced mode only), enhanced mode power-up test
Dual function active-low RST/active-low INT provides lock-up notification and hardware reset
Supply current of 90µA (enhanced mode), standby current is 0.2µA (5V supply)
Host notification on detection of lock-up, maintain fault diagnostic information
3 address control inputs, low RON switches, logic level translation
Low 0.1µA (typ) standby current, supports hot insertion
100Kbps standard mode or 400Kbps fast mode I2C interface
Address translation allows multiple device with same ID, 5.5V tolerant inputs
