Mouser – Level translating I2C-Bus / SMBus repeater has two voltage supplies (NXP - PCA9509A)Jun 21 2012 - Power [More Power Articles]
Now available from Mouser, the NXP PCA9509A level translating I2C-Bus / SMBus repeater has two voltage supplies that enables processor low voltage 2-wire serial bus to interface with standard I2C-bus or SMBus I/O.
While retaining all the operating modes and features of the I2C-bus system during the level shifts, it also permits extension of the I2C-bus by providing bidirectional buffering for both the data (SDA) and the clock (SCL) lines, thus enabling the I2C-bus or SMBus maximum capacitance of 400pF on the higher voltage side. Port A allows a voltage range from 0.8V to 1.5V and requires no external pull-up resistors due to the internal current source. Port B allows a voltage range from 2.3V to 5.5V and is over-voltage tolerant. Both port A and port B SDA and SCL pins are high-impedance when the PCA9509A is unpowered, says the company.More news from Mouser