| Part Numbers | Manufacturer Name | Datasheet | Core Processor | Core Size | Speed | Connectivity | RAM Size | Number of I/O | Program Memory Size | Program Memory Type | EEPROM Size | Voltage - Supply (Vcc/Vdd) | Data Converters | Oscillator Type | Operating Temperature | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| T89C5121-ICUIL | ATMEL CORP | 80C51 | 8-Bit | 16MHz | SmartCard, UART/USART | 14 | 16KB (16K x 8) | Flash RAM | 16K x 8 | 256 x 8 | 2.85 V ~ 5.4 V | - | Internal | -40°C ~ 85°C | 24-SSOP (0.209, 5.30mm Width) | |
| AT89C5121-ICSUL | ATMEL CORP | 80C51 | 8-Bit | 16MHz | SmartCard, UART/USART | 14 | 16KB (16K x 8) | Flash RAM | 16K x 8 | 256 x 8 | 2.85 V ~ 5.4 V | - | Internal | -40°C ~ 85°C | 24-SSOP (0.209, 5.30mm Width) | |
| AT89C5121-YSUL | ATMEL CORP | 80C51 | 8-Bit | 16MHz | SmartCard, UART/USART | 14 | 16KB (16K x 8) | Flash RAM | 16K x 8 | 256 x 8 | 2.85 V ~ 5.4 V | - | Internal | -40°C ~ 85°C | 24-SSOP (0.209, 5.30mm Width) |
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