| PartNumber | P87C661X2BBD,157 | P87C660X2BBD,157 | P87C660X2FA,529 |
| Description | IC MCU 8BIT 16KB OTP 44LQFP | Microcontrollers - MCU 8-bit Microcontrollers - MCU 16K/512 OTP 12/6 | Microcontrollers - MCU 8-bit Microcontrollers - MCU 80C51 16K/512 OTP |
| Manufacturer | - | NXP Semiconductors | NXP Semiconductors |
| Product Category | - | Embedded - Microcontrollers | Embedded - Microcontrollers |
| Series | - | 87C | 87C |
| Packaging | - | Tray | Tube |
| Package Case | - | 44-LQFP | 44-LCC (J-Lead) |
| Operating Temperature | - | 0°C ~ 70°C (TA) | -40°C ~ 85°C (TA) |
| Supplier Device Package | - | 44-LQFP (10x10) | 44-PLCC (16.59x16.59) |
| Number of I O | - | 32 | 32 |
| Speed | - | 33MHz | 33MHz |
| EEPROM Size | - | - | - |
| Core Processor | - | 8051 | 8051 |
| RAM Size | - | 512 x 8 | 512 x 8 |
| Program Memory Type | - | OTP | OTP |
| Peripherals | - | POR, PWM, WDT | POR, PWM, WDT |
| Connectivity | - | EBI/EMI, I2C, UART/USART | EBI/EMI, I2C, UART/USART |
| Voltage Supply Vcc Vdd | - | 2.7 V ~ 5.5 V | 2.7 V ~ 5.5 V |
| Core Size | - | 8-Bit | 8-Bit |
| Program Memory Size | - | 16KB (16K x 8) | 16KB (16K x 8) |
| Data Converters | - | - | - |
| Oscillator Type | - | Internal | Internal |