The LPC11U34FBD48/421,: At 50 MHz the Cortex-M0 executes most single-cycle instructions, so a 10 kHz PID loop with a dozen sensor reads and a USB packet push leaves plenty of headroom. The 8-channel 10-bit ADC samples fast enough for basic analog inputs — think potentiometer feedback or current-sense resistor reads — but not for audio-rate acquisition.
LPC11U34FBD48/421, NXP LPC11U34FBD48/421 ARM Cortex-M0 MCU, 50MHz, 48KB Flash
MPNLPC11U34FBD48/421,
Active
NXP LPC11Uxx series 32-bit ARM Cortex-M0 MCU, 50MHz, 48KB Flash, 10KB RAM, 4KB EEPROM, USB full-speed device, 40 I/O, 1.8–3.6 V supply, -40°C to 85°C, 48-LQFP (7×7 mm) surface-mount.
$6.7500Ref. price · indicative, final on quote
Packaging48-LQFP
RoHSROHS3 Compliant
SeriesLPC11Uxx
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| 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 | Tray |
| RAM size | 10K 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) | 40 |
| Core processor | ARM® Cortex®-M0 |
| Case | 48-LQFP |
| Data converters | A/D 8x10b |
| Program memory size | 48KB (48K x 8) |
Product details
Frequently asked questions
What is the closest pin-compatible alternative to LPC11U34FBD48/421 in the LPC11Uxx family?
The LPC11Uxx series shares the same 48-LQFP footprint and pinout across density options. A higher-Flash sibling like the LPC11U37FBD48/501 (64 KB Flash) is a drop-in replacement if you need more code space, but the 48 KB version is the standard fit for most USB-bridge and control applications.
What compliance documentation does NXP provide for LPC11U34FBD48/421?
The part is ROHS3 compliant. NXP typically supplies a REACH declaration and material composition data upon request through the distribution channel.