Difference Between CY2544 and CY2545

Question: What is the difference between the CY2544 and the CY2545?

 

Answer:

The main difference between the CY2544 and CY2545 is that the CY2545 has I2C and the CY2544 does not have I2C. So accordingly, the CK3/FS0 (pin 8) and PD#/OE/FS1 (pin 9) of the CY2544 gets replaced by SCL and SDAT respectively. The CY2545 has up to 8 outputs and CY2544 has up to 9 outputs due to the SCL pin, so the output numbering is shifted. Besides that difference, they are the same part in form, fit, and functionality.