| PartNumber | CY8C3866PVI-021 | CY8C3866PVI-021T | CY8C3866PVI-005 |
| Description | 8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V | 8-bit Microcontrollers - MCU 8051 8bit 67MHz 64KB | 8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V |
| Manufacturer | Cypress Semiconductor | Cypress Semiconductor | Cypress Semiconductor |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SSOP-48 | SSOP-48 | SSOP-48 |
| Series | CY8C3866 | CY8C3866 | CY8C3866PVI |
| Core | 8051 | 8051 | 8051 |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 67 MHz | 67 MHz | 67 MHz |
| Program Memory Size | 64 kB | 64 kB | 64 kB |
| Data RAM Size | 8 kB | 8 kB | 8 kB |
| ADC Resolution | 20 bit | 20 bit | 20 bit |
| Number of I/Os | 28 I/O | - | 28 I/O |
| Operating Supply Voltage | 1.8 V | 1.8 V | 1.8 V |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tube | Reel | Tube |
| Program Memory Type | Flash | - | Flash |
| Brand | Cypress Semiconductor | Cypress Semiconductor | Cypress Semiconductor |
| Data RAM Type | SRAM | - | SRAM |
| Interface Type | I2C, SPI, UART, USB | - | I2C, SPI, UART, USB |
| Analog Supply Voltage | 1.8 V | 1.8 V | 1.8 V |
| DAC Resolution | 8 bit | 8 bit | 8 bit |
| I/O Voltage | 1.8 V | 1.8 V | 1.8 V |
| Moisture Sensitive | Yes | Yes | - |
| Number of Timers/Counters | 4 Timer | - | 4 Timer |
| Processor Series | CY8C38 | CY8C3866 | CY8C38 |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 60 | 1000 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 1.89 V | 1.89 V | 1.89 V |
| Supply Voltage Min | 1.71 V | 1.71 V | 1.71 V |
| Tradename | PSoC | PSoC | - |
| Unit Weight | 0.021175 oz | 0.021175 oz | 0.021175 oz |
| Minimum Operating Temperature | - | - 40 C | - |