| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | P87C554SFAA | 80C51 8-bit microcontroller ? 12 clock operation 16K/512 OTP/RAM 8 channel 10-bit A/D, I2C, PWM, capture/compare, high I/O | 404K |
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| 2 | P87C554SFAA | 80C51 8-bit microcontroller ? 12 clock operation 16K/512 OTP/RAM 8 channel 10-bit A/D, I2C, PWM, capture/compare, high I/O | 404K |
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| 3 | P87C554SFAA512 | IC-SM-8 BIT MCU | 544K |
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| 4 | P87C554SFBD | 80C51 8-bit microcontroller . 6 clock operation 16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, 64L LQFP | 410K |
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