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8-Bit RISC MCU, 20MHz, 3.5KB EPROM, SSOP-20, 125°C
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PIC16C558T 8b 20MHz 5.5V 1W 3.5KB EPROM MCU, SSOP-20
8-Bit MCU, 3.5KB OTP, 20MHz, 5.5V, SSOP