| EU RoHS | Compliant |
| ECCN (US) | EAR99 |
| Part Status | Active |
| HTS | 8542.31.00.01 |
| Automotive | No |
| PPAP | No |
| Family Name | AT89 |
| Instruction Set Architecture | CISC |
| Device Core | 8051 |
| Core Architecture | 8051 |
| Maximum CPU Frequency (MHz) | 24 |
| Maximum Clock Rate (MHz) | 24 |
| Data Bus Width (bit) | 8 |
| Program Memory Type | Flash |
| Program Memory Size | 4KB |
| RAM Size | 128B |
| Maximum Expanded Memory Size | 64KB |
| Programmability | Yes |
| Interface Type | UART |
| Number of I/Os | 32 |
| No. of Timers | 2 |
| USART | 0 |
| UART | 1 |
| USB | 0 |
| SPI | 0 |
| I2C | 0 |
| I2S | 0 |
| CAN | 0 |
| Ethernet | 0 |
| Minimum Operating Supply Voltage (V) | 4 |
| Typical Operating Supply Voltage (V) | 5 |
| Maximum Operating Supply Voltage (V) | 5.5 |
| Minimum Operating Temperature (°C) | -40 |
| Maximum Operating Temperature (°C) | 85 |
| Supplier Temperature Grade | Industrial |
| Packaging | Tube |
| Pin Count | 44 |
| Standard Package Name | LCC |
| Supplier Package | PLCC |
| Mounting | Surface Mount |
| Package Height | 3.48(Max) |
| Package Length | 16.7(Max) |
| Package Width | 16.7(Max) |
| PCB changed | 44 |
| Lead Shape | J-Lead |
