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| Part Number | UPSD3454E-40U6 | UPSD3454EB40U6 | UPSD3434E-40U6 | UPSD3454E-40T6 | 
|---|---|---|---|---|
| Manufacturer | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | 
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | 
| Core Processor | 8032 | 8032 | 8032 | 8032 | 
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 
| Speed | 40MHz | 40MHz | 40MHz | 40MHz | 
| Connectivity | I²C, IrDA, SPI, UART/USART, USB | I²C, IrDA, SPI, UART/USART, USB | I²C, IrDA, SPI, UART/USART, USB | I²C, IrDA, SPI, UART/USART, USB | 
| Peripherals | LVD, POR, PWM, WDT | LVD, POR, PWM, WDT | LVD, POR, PWM, WDT | LVD, POR, PWM, WDT | 
| Number of I/O | 46 | 46 | 46 | 35 | 
| Program Memory Size | 288KB (288K x 8) | 288KB (288K x 8) | 288KB (288K x 8) | 288KB (288K x 8) | 
| Program Memory Type | Flash | Flash | Flash | Flash | 
| EEPROM Size | - | - | - | - | 
| RAM Size | 32K x 8 | 32K x 8 | 8K x 8 | 32K x 8 | 
| Voltage - Supply (Vcc/Vdd) | 3V ~ 5.5V | 3V ~ 5.5V | 3V ~ 5.5V | 3V ~ 5.5V | 
| Data Converters | A/D 8x10b | A/D 8x10b | A/D 8x10b | A/D 8x10b | 
| Oscillator Type | Internal | Internal | Internal | Internal | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | 
| Package / Case | 80-LQFP | 80-LQFP | 80-LQFP | 52-TQFP | 
| Supplier Device Package | - | - | - | - |