The ATO00512X8TS012FFC8EA is organized as 512 bits by 8 one-time programmable (OTP). This is a kind of non-volatile memory fabricated in TSMC 12nmFFC .
The AT512X8Z110LL0AA is organized as a 512-bit by 8 one-time programmable (OTP). This is a kind of non-volatile memory fabricated in SMIC 110nm 1.2V/3.3V .