DS1340U-3+T&R DS1307Z+T&R RV-3049-C2-32.768KHZ-OPTION-A-TB-QC MCP79401T-I/MNY M41T93RMY6E MCP79400T-I/SN RX8900CE:UBB M41T00M6F RTC-8564NB:B:ROHS M41T93SMY6E MCP79400-I/SN MCP79402T-I/MNY DS1308U-18+T ISL1208IU8Z-TK RX-8035SA:B PURE SN R M41T93ZMY6E RV-8263-C7-32.768KHZ-20PPM-TA-QA MCP79412T-I/SN RX-8731LC:B0 PURE SN DS1302Z+T&R