AT89C51ED2-UM
AT89C51ED2-UM/AT89C51ED
AT89C51ED2-UM/IM
AT89C51IC2RIL
AT89C51IC2RIM
AT89C51IC2-RLRIL
AT89C51IC2-RLRIM
AT89C51IC2-RLRUL
AT89C51IC2-RLRUM