AT24C512BN-SH-B AT24C512BN-SH-T AT24C512BN-SH-T 2FB 2 AT24C512BN-SH-T(1.8-3.6V) AT24C512BN-SSHD AT24C512BN-T AT24C512BN-TH-T AT24C512B-PU AT24C512B-PU(2fb) AT24C512B-PU1.8