NXP LPC11U34FHN33/311551, 32-bit ARM Cortex-M0 MCU, 50 MHz, 40 KB Flash, 8 KB RAM, 4 KB EEPROM, USB, I²C, SPI, UART, 26 I/O, -40 to 85 °C, 32-HVQFN.
| Parameter | Value |
|---|---|
| Series | LPC11Uxx |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.8V ~ 3.6V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 50MHz |
| Package | Bulk |
| RAM size | 8K x 8 |
| Core size | 32-Bit Single-Core |
| EEPROM size | 4K x 8 |
| Peripherals | Brown-out Detect/Reset, POR, WDT |
| Connectivity | I²C, Microwire, SmartCard, SPI, SSP, UART/USART, USB |
| Number of i (O) | 26 |
| Core processor | ARM® Cortex®-M0 |
| Case | 32-VQFN Exposed Pad |
| Data converters | A/D 8x10b |
| Program memory size | 40KB (40K x 8) |
The 4 KB on-chip EEPROM provides non-volatile parameter storage for calibration constants, configuration data, or small lookup tables — no external serial EEPROM needed for many designs. The 26 general-purpose I/O lines, combined with an internal oscillator and brown-out detect, allow a minimal BOM: just the MCU, decoupling caps, and the USB connector for many applications.
The supply voltage range is 1.8 V to 3.6 V, covering both 3.3 V and 1.8 V rails.
No — the LPC11U34FHN33/311551 comes in a 32-HVQFN package, while the LPC11U34FBD48 uses a 48-pin LQFP. They are not pin-compatible; a board redesign is required to switch between them.
The key specifications are: 32-bit ARM Cortex-M0 core at 50 MHz, 40 KB Flash, 8 KB RAM, 4 KB EEPROM, USB 2.0 full-speed device, I²C, SPI, SSP, UART/USART, SmartCard, 26 I/O, 8-channel 10-bit ADC, internal oscillator, 1.8 V to 3.6 V supply, -40 to 85 °C operating temperature, 32-HVQFN package.