| Part Number | AT89LS51-16AU | AT89LS51-16AI |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Category | Embedded - Microcontrollers | Embedded - Microcontrollers |
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| Product Status | Active | Obsolete |
| Core Processor | 8051 | 8051 |
| Core Size | 8-Bit | 8-Bit |
| Speed | 16MHz | 16MHz |
| Connectivity | UART/USART | UART/USART |
| Peripherals | WDT | WDT |
| Number of I/O | 32 | 32 |
| Program Memory Size | 4KB (4K x 8) | 4KB (4K x 8) |
| Program Memory Type | Flash | Flash |
| EEPROM Size | - | - |
| RAM Size | 128 x 8 | 128 x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 4V | 2.7V ~ 4V |
| Data Converters | - | - |
| Oscillator Type | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 44-TQFP | 44-TQFP |
| Supplier Device Package | 44-TQFP (10x10) | 44-TQFP (10x10) |