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PCA9509 Level translating I2C-bus/SMBus repeater

PCA9509 Description

PCA9509 Level translating I2C-bus/SMBus repeater Rev.7 * 4 November 2014 Product data sheet 1.General .
The PCA9509 is a level translating I2C-bus/SMBus repeater that enables processor low voltage 2-wire serial bus to interface with standard I2C-bus or S.

PCA9509 Features

* Bidirectional buffer isolates capacitance and allows 400 pF on port B of the device
* Voltage level translation from port A (1.35 V to VCC(B)  1.0 V) to port B (3.0 V to 5.5 V)
* Requires no external pull-up resistors on lower voltage port A
* Active HIGH repeater enable input

PCA9509 Applications

* where Port A VCC(A) is less than 1.35 V or Port B VCC(B) is less than 3.0 V, use drop-in replacement PCA9509A. The bus port B drivers are compliant with SMBus I/O levels, while port A uses a current sensing mechanism to detect the input or output LOW signal which prevents bus lock-up. Port A uses a

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Level translating I2C-bus SMBus repeater NXP
NXP PCA9509-like datasheet