LEDs produce different colors by using various materials which produce photons at different wavelengths.
HN58C256AFP-10E
HITACHIHM6208HLP-35
HITACHISRAM Chip Async Single 5V 256K-bit 64K x 4-bit 35ns 24-Pin PDIPHM6148HP-45
Hitachi LtdSRAMHM6287HLJP-25
Hitachi LtdDescription: Cache SRAM, 64KX1, 25ns, CMOS, PDSO24, 0.300 INCH, SOJ-24HM514280JP-8
Hitachi LtdFast Page DRAM, 256KX18, 80ns, CMOS, PDSO40, 0.400 INCH, PLASTIC, SOJ-40HM628128LT-12
Hitachi LtdStandard SRAM, 128KX8, 120ns, CMOS, PDSO32, 8 X 20 MM, 1.20 MM HEIGHT, TSOP-32HM67G1866BP-7
Hitachi LtdLate-Write SRAM, 64KX18, 4ns, PBGA119, BGA-119HM628128BLR-7SL
Hitachi LtdDescription: Standard SRAM, 128KX8, 70ns, CMOS, PDSO32, 8 X 20 MM, PLASTIC, REVERSE, TSOP-32HM62256P-8
Hitachi LtdStandard SRAM, 32KX8, 85ns, CMOS, PDIP28, 0.600 INCH, PLASTIC, DIP-28HM5264805TT-80
Hitachi LtdDescription: Synchronous DRAM, 8MX8, 6ns, CMOS, PDSO54, 0.400 INCH, PLASTIC, TSOP2-54