The ATO0016X16SM180BS33NA is organized as 16 bits by 16 one-time programmable (OTP) in 16-bit read and 1-bit program modes. This is a kind of non-volatile memory fabricated in SMIC 0.18μm 1.8V/5V BCDM process. The OTP can be widely used in chip ID, security key, memory redundancy, parameter trimming, configuration setting, feature selection, and PROM, etc.