onsemi 20-SOIC MM74HC540WM

The part number "MM74HC540WM" refers to a 74HC540, which is a high-speed CMOS logic device from the 74HC series manufactured by brands such as ON Semiconductor or Texas Instruments. It's a 10-channel, non-inverting buffer/driver IC designed for low power consumption and capable of operating at wide voltage ranges typically between 2V to 6V. The 'WM' suffix often denotes a specific manufacturer's packaging type or temperature range variant, suitable for various digital electronics applications where signal amplification and impedance matching are required.