51系列 50MHz 闪存：64K@x8bit RAM：4.25KB
8051 series IC 8 位 50MHz 64KB（64K x 8） 闪存 32-LQFP（7x7）
得捷:
IC MCU 8BIT 64KB FLASH 32LQFP
立创商城:
51系列 50MHz 闪存：64K@x8bit RAM：4.25KB
贸泽:
8-bit Microcontrollers - MCU 50 MIPS 64 kB 4 kB SPI UART I2C
艾睿:
This C8051F503-IQR microcontroller from Silicon Laboratories is perfect for users that want a fast CPU. This microcontroller has a minimum operating temperature of -40 °C and a maximum of 125 °C. It has a maximum clock speed of 50 MHz. This device has a typical operating supply voltage of 2.5|3.3|5 V. Its minimum operating supply voltage of 1.8 V, while its maximum is 5.25 V. This is a 8 bit processor. This device is based on the 8051 core architecture. Its flash program memory is 64KB. Its ADC resolution is 12.