1337GNLGI RTC-4574SA:B:PURE SN DS1251WP-120+C01 1337GNLGI8 RTC-4701JE:B ROHS DS1251WP-120+C02 1337GCSRI RTC-4701NB:B ROHS DS1302Z+T&R/C07 1337GCSRI8 RTC-72421A: PURE SN DS1307Z+T&R/C01 1338-18DVGI RTC-72421B: PURE SN DS1307ZN+T&R/C02 1338-18DVGI8 RTC-7301SF:B ROHS RX-4801JE:UB 1338C-18SRI RTC-7301SF:B0 ROHS