Features:Dual bidirectional IIC bus buffer repeater Compatible with IC bus and System Management Bus (SMBus), this device contains two identical bidirectional open drain buffer circuits that can be extended 20 and similar bus systems without degrading system performance. Since the 12C bus capacitance is limited to 400pF, the number of devices and bus length are limited. With the PCA9515A, system designers can isolate the two halves of the bus to accommodate more 12C devices or longer wiring lengths. It can realize different level signal communication between the two sides of the buffer repeater C devices, such as 5V and 3.3V signal level 1C communication. It can also realize the communication rate matching of the Chuan C devices on both sides of the buffer repeater, such as one side is 400KHz and the other side is 100K ratio, but the maximum communication rate of the system will be less than 100KH, because the buffer repeater has a delay. Two or more PCA9515As cannot be cascaded. Devices SDA and SCL are open drain outputs.1. Working voltage: 2.3V3.6V 2. 11C Clock frequency: 0400KH2 3. Working temperature: -40C-85C 4. Small board size: 18.5mm*13.3mm*2.43mm 5. With two M3 mounting holes6. SCL0, SDA0, EN, SCL1 and SDA1 on the small board have been welded with 10K pull-up resistors, and no external connection is neededPackage included:3 pcs CJMCU-9515 400KHz PCA9515A Dual Bidirectional I2C Bus/SMBus Repeater Module I2C buffer Module Board