| Controller Family/Series | AT89S4051 |
| CPU Speed | 24MHz |
| Program Memory Size | 4KB |
| RAM Memory Size | 256Byte |
| No. of Pins | 20Pins |
| MCU Case Style | SOIC |
| No. of I/O's | 15I/O's |
| Embedded Interface Type | SPI, UART |
| Supply Voltage Min | 2.7V |
| Supply Voltage Max | 5.5V |
| Packaging | Each |
| Product Range | 8051 Microcontrollers |
| Automotive Qualification Standard | - |
| RoHS Phthalates Compliant | Yes |
| MSL | MSL 2 - 1 year |
| SVHC | No SVHC (17-Dec-2015) |
| Device Marking | AT89S4051-24SU |
| Flash Memory Size | 4KB |
| Logic Function Number | 4051 |
| MCU Family | 8051 |
| MCU Series | AT89S40 |
| MPU Core Size | 8bit |
| Memory Type | Flash |
| Microprocessor/Controller Features | 6 Interrupt Sources, ISP, PWM, BOR |
| No. of Bits | 8bit |
| No. of PWM Channels | 1 |
| No. of Timers | 2 |
| Number of bits In Timer | 16 |
| Operating Temperature Max | 85°C |
| Operating Temperature Min | -40°C |
| Operating Temperature Range | -40°C to +85°C |
| Oscillator Type | External |
| Peripherals | Comparator |
| Supply Voltage Range | 2.7V to 5.5V |
