www.DataSheet4U.com HT66F03/ HT66F04/HT68F03/ HT6.
HT66F03 - Small Package Enhanced Flash Type 8-Bit MCU
HT68F03T3 - (HT66F03T3 / HT68F03T3) 8-Bit Flash MCU
HT66F03M - 1.5V Battery Flash Type 8-Bit MCU
HT66F03T3 - (HT66F03T3 / HT68F03T3) 8-Bit Flash MCU