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5pcs At89c51 At89c51-24pi At89c51-24pu 8-bit Microcontroller With 4k Bytes Flash Dip-40 - Integrated Circuits - AliExpress
AT89C5131A-RDTUM Microchip | Microchip AT89C5131A-RDTUM, 8bit 80C5X2 Microcontroller, AT89C51, 48MHz, 32 kB Flash, 64-Pin VQFP | 177-3767 | RS Components
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