32-bit ARM Cortex M3 RISC microcontroller featuring 256KB Flash program memory and 48KB RAM. Operates at a maximum clock rate of 20 MHz with 67 programmable I/Os. Includes dual ADCs with 16 channels each and supports I2C, SPI, SSI, and UART interfaces. Packaged in a 48-pin LQFP (Low Profile Quad Flat Package) with gull-wing leads for surface mounting, measuring 7.2mm x 7.2mm x 1.45mm. Operating voltage range is 1.2V to 3.3V, with an extended temperature range of -40°C to 105°C.
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Texas Instruments LM3S5R31-EQN20-C0T technical specifications.
| Basic Package Type | Lead-Frame SMT |
| Package Family Name | QFP |
| Package/Case | LQFP |
| Package Description | Low Profile Quad Flat Package |
| Lead Shape | Gull-wing |
| Pin Count | 48 |
| PCB | 48 |
| Package Length (mm) | 7.2(Max) |
| Package Width (mm) | 7.2(Max) |
| Package Height (mm) | 1.45(Max) |
| Seated Plane Height (mm) | 1.6(Max) |
| Pin Pitch (mm) | 0.5 |
| Package Material | Plastic |
| Mounting | Surface Mount |
| Jedec | MS-026BBC |
| Family Name | Stellaris |
| Data Bus Width | 32bit |
| Instruction Set Architecture | RISC |
| Maximum Clock Rate | 20MHz |
| Maximum CPU Frequency | 20MHz |
| Device Core | ARM Cortex M3 |
| Program Memory Type | Flash |
| Program Memory Size | 256KB |
| RAM Size | 48KB |
| Number of Programmable I/Os | 67 |
| Core Architecture | ARM |
| Programmability | Yes |
| Number of Timers | 4 |
| Interface Type | I2C/SPI/SSI/UART |
| Max Operating Supply Voltage | 1.32|3.6V |
| Min Operating Temperature | -40°C |
| Max Operating Temperature | 105°C |
| ADC Channels | 16/16 |
| Number of ADCs | Dual |
| Cage Code | 01295 |
| HTS Code | 8542310001 |
| Schedule B | 8542310000 |
| Automotive | No |
| AEC Qualified | No |
| PPAP | No |
| Radiation Hardening | No |
| RoHS Versions | 2011/65/EU |
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