PCA9306DCUT

Functions

• Voltage - Level Translation: It can perform bidirectional voltage translation between 1.2V and 5V without the need for a direction pin. 
• It works within the voltage range of 1.2V to 3.3V REF1 and 1.8V to 5.5V REF2. 
• The low on - state resistance (RON) of the switch allows connections to be made with minimal propagation delay. When EN is high, 
• the translator switch is on, and the SCL1 and SDA1 I/O are connected to the SCL2 and SDA2 I/O, respectively,
•  enabling bidirectional data flow between ports. When EN is low, the translator switch is off, and there is a high - impedance state between ports.
• Bus Isolation: In addition to voltage translation, it can be used to isolate a 400kHz bus from a 100kHz bus by controlling the EN pin. 
• This is useful in mixed - mode I²C applications where there are buses operating at different frequencies.
• Signal Integrity Maintenance: It is a 2 - bit bidirectional translator for SDA and SCL lines in mixed - mode I²C applications. 
• It is compatible with I²C and SMBus and has a maximum propagation delay of less than 1.5ns, 
• which can accommodate standard - mode and fast - mode I²C devices and multiple masters. 
• The low 3.5Ω on - state connection between input and output ports provides less signal distortion.
•  It also has open - drain I²C I/O ports (SCL1, SDA1, SCL2, and SDA2) and 5V - tolerant I²C I/O ports to support mixed - mode signal operation. 
• When EN is low, the SCL1, SDA1, SCL2, and SDA2 pins are in a high - impedance state, and the device features lock - up - free operation for isolation.

Applications

• Mixed - Voltage I²C/SMBus Systems: 
• Commonly used in systems where there are devices operating at different voltage levels and need to communicate via I²C or SMBus. For example, 
• in some embedded systems, there may be low - voltage microcontrollers and high - voltage peripherals, 
• and the PCA9306DCUT can be used to ensure proper voltage - level translation and reliable data communication between them5.
• Bus Isolation in Multi - Frequency I²C Applications: 
• When there are I²C buses operating at different frequencies in a system, such as a 400kHz bus and a 100kHz bus,
•  it can be used to isolate the two buses to prevent interference and ensure the normal operation of each bus1.
• Any System Requiring Voltage - Level Translation and Signal Conditioning for I²C/SMBus Signals: S
• uch as in some industrial control systems, consumer electronics, and communication equipment, 
• where there is a need to interface different voltage - level I²C/SMBus devices and ensure the integrity of signals, the PCA9306DCUT can play an important role.

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