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| Part Number | EFM8LB12F64ES0-C-QFN24 | EFM8LB12F64ES1-C-QFN24 | EFM8LB12F64ES0-C-QFN24R | EFM8LB12F64ES0-B-QFN24 | 
|---|---|---|---|---|
| Manufacturer | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | 
| Product Status | Active | Active | Active | Obsolete | 
| Core Processor | CIP-51 8051 | CIP-51 8051 | CIP-51 8051 | CIP-51 8051 | 
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 
| Speed | 72MHz | 72MHz | 72MHz | 72MHz | 
| Connectivity | I²C, SMBus, SPI, UART/USART | I²C, SMBus, SPI, UART/USART | I²C, SMBus, SPI, UART/USART | I²C, SMBus, SPI, UART/USART | 
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | 
| Number of I/O | 20 | 20 | 20 | 20 | 
| Program Memory Size | 64KB (64K x 8) | 64KB (64K x 8) | 64KB (64K x 8) | 64KB (64K x 8) | 
| Program Memory Type | Flash | Flash | Flash | Flash | 
| EEPROM Size | - | - | - | - | 
| RAM Size | 4.25K x 8 | 4.25K x 8 | 4.25K x 8 | 4.25K x 8 | 
| Voltage - Supply (Vcc/Vdd) | 2.2V ~ 3.6V | 2.2V ~ 3.6V | 2.2V ~ 3.6V | 2.2V ~ 3.6V | 
| Data Converters | A/D 12x14b; D/A 4x12b | A/D 12x14b; D/A 4x12b | A/D 12x14b; D/A 4x12b | A/D 12x14b; D/A 4x12b | 
| Oscillator Type | Internal | Internal | Internal | Internal | 
| Operating Temperature | -40°C ~ 105°C (TA) | -40°C ~ 105°C (TA) | -40°C ~ 105°C (TA) | -40°C ~ 105°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | 
| Package / Case | 32-TQFP | 24-VFQFN Exposed Pad | 24-VFQFN Exposed Pad | 24-VFQFN Exposed Pad | 
| Supplier Device Package | 32-QFP (7x7) | 24-QFN (3x3) | 24-QFN (3x3) | 24-QFN (3x3) |