AT27C256R-70PU: High-Speed 256Kb EPROM Memory IC by Microchip Technology 2025-04-19 Discover the AT27C256R-70PU - a high-performance 256Kb (32Kx8) OTP EPROM from Microchip Technology with 70ns access time, 4.5-5.5V operation, and industrial temperature range. Ideal for embedded systems & firmware storage.