NXP LPC11Uxx series 32-bit ARM Cortex-M0 MCU, 50MHz, 64KB Flash, 10K x 8 RAM, 4K x 8 EEPROM, USB 2.0, I²C/SPI/UART, 8x10b ADC, 26 I/O, 48-LQFP, -40°C to 85°C, 1.8V to 3.6V.
| 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 | 10K x 8 |
| Core size | 32-Bit Single-Core |
| EEPROM size | 4K x 8 |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Connectivity | I²C, Microwire, SmartCard, SPI, SSP, UART/USART, USB |
| Number of i (O) | 26 |
| Core processor | ARM® Cortex®-M0 |
| Case | 48-LQFP |
| Data converters | A/D 8x10b |
| Program memory size | 64KB (64K x 8) |
The LPC11U35FBD48/40EL: At 50 MHz, this core has enough headroom to service USB interrupts, handle a modest protocol stack, and still run application code without a dedicated communications co-processor. For a USB CDC or HID class device moving small packets, the 50 MHz clock keeps bus turnaround tight enough that you don't need to buffer aggressively in RAM.
Active product status, ROHS3 compliant. No end-of-life notice.
The supply voltage range is 1.8V to 3.6V, covering both 3.3V regulated rails and single-cell Li-ion battery applications.
Yes, it includes a USB 2.0 full-speed device controller alongside I²C, SPI, SSP, UART/USART, and SmartCard interfaces.
The part comes in a 48-LQFP package (7x7 mm) with 26 general-purpose I/O lines, an 8-channel 10-bit ADC, and dedicated USB D+/D- pins. Pin 1 is marked by a chamfered corner and a dot on the package top.
The /40EL suffix indicates the specific ordering code variant. Both share the same 48-LQFP footprint and core architecture within the LPC11Uxx family, but verify the specific Flash and RAM configuration against your firmware image — the /40EL carries 64KB Flash and 10K x 8 RAM.