NXP Semiconductors LPC11U12FHN33/201K

Overview

LPC11U12FHN33/201K from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller in HVQFN33 package, operating up to 50 MHz with 16 kB flash, 6 kB SRAM (4 kB main + 2 kB USB), full-speed USB 2.0 device controller, 10-bit ADC (8 channels), and 26 GPIO pins - deployed in USB audio devices, handheld scanners, and industrial control nodes requiring low-power embedded connectivity.

For engineers reviewing the LPC11U12FHN33/201K datasheet, LPC11U12FHN33/201K pinout, LPC11U12FHN33/201K application, or LPC11U12FHN33/201K equivalent, key selection criteria include USB device stack readiness, 5 V-tolerant GPIO configuration, fractional baud rate USART for RS-485, I²C Fast-mode Plus support at 1 Mbit/s, and Deep power-down wake-up via dedicated WAKEUP pin.

Technical Context

The LPC11U12FHN33/201K integrates dual PLLs - one for CPU clock generation (up to 50 MHz) from system oscillator or 12 MHz IRC, and a second dedicated PLL for USB 48 MHz clock - enabling synchronous USB operation without external crystal dependency. Its boot ROM includes ISP/IAP firmware and power profile APIs for runtime power mode switching.

Peripheral multiplexing is managed via IOCON registers; all non-debug functions require explicit configuration before use. The HVQFN33 package omits CT32B0_CAP1 and DSR/RI pins present in LQFP48/TFBGA48 variants, limiting timer capture inputs and modem control signals to 26 usable GPIOs with eight supporting glitch filtering.

Key Specifications

Pinout & Package

HVQFN33 package: plastic thermal enhanced very thin quad flat package, no leads, 33 terminals, body size 7 × 7 × 0.85 mm, exposed thermal pad, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with LPC11U12FHN33/201K, LPC11U14FHN33/201 offers scalable flash without layout changes, while STM32F042F4P6 trades peripheral flexibility for lower price and smaller footprint - making the original optimal for balanced USB+RS-485+I²C designs in space-constrained industrial enclosures.

Availability

LPC11U12FHN33/201K is available at Aetrix Electronics and suitable for USB audio devices, handheld scanners, and industrial control applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized NXP channels.

Supply support for LPC11U12FHN33/201K includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with core expertise in ARM-based microcontrollers and NFC technologies.

The LPC11U1x product line targets cost-sensitive, USB-connected embedded systems - designed to replace 8/16-bit MCUs with ARM efficiency, integrated USB device functionality, and ultra-low-power operation across consumer, medical, and industrial segments.

FAQ

What is the maximum operating frequency of the LPC11U12FHN33/201K?

The LPC11U12FHN33/201K operates at a maximum CPU frequency of 50 MHz, achieved using either the internal 12 MHz IRC oscillator or an external 1–25 MHz crystal with its integrated PLL. This frequency is sustained across the full industrial temperature range (−40 °C to +85 °C) and 1.8–3.6 V supply, enabling deterministic real-time execution for USB and sensor processing tasks.

Does the LPC11U12FHN33/201K support USB device enumeration without external components?

Yes, the LPC11U12FHN33/201K supports full USB 2.0 full-speed device enumeration without external pull-up resistors via its SoftConnect feature: the USB_CONNECT pin controls an internal switch to connect a 1.5 kΩ resistor to USB_DP, and USB_VBUS pin detects host connection - both managed entirely in firmware using ROM-based USB stack APIs.

How many ADC channels are available on the LPC11U12FHN33/201K and what is their resolution?

The LPC11U12FHN33/201K integrates a single 10-bit successive approximation ADC with 8 input channels (AD0–AD7), mapped to specific GPIO pins including PIO0_11 through PIO0_16 and PIO0_22/PIO0_23. It supports sampling rates up to 400 kS/s and includes configurable burst mode for automated channel scanning without CPU intervention.

What power modes does the LPC11U12FHN33/201K support and how is Deep power-down exited?

The LPC11U12FHN33/201K supports four power modes: Sleep, Deep-sleep, Power-down, and Deep power-down. Deep power-down is exited exclusively via the dedicated WAKEUP pin (PIO0_16), which detects a LOW-going pulse as short as 50 ns - this pin must be pulled HIGH externally to enter Deep power-down and driven LOW to exit it, ensuring ultra-low leakage current (<1 µA).

Is the LPC11U12FHN33/201K pin-compatible with other members of the LPC11U1x family?

The LPC11U12FHN33/201K shares identical pinout and package (HVQFN33) with LPC11U14FHN33/201 and LPC11U14FHI33/201, enabling direct substitution where flash capacity permits. However, it is not pin-compatible with LQFP48 or TFBGA48 variants due to differing pin counts and signal allocations - e.g., CT32B0_CAP1 and DSR/RI are absent in HVQFN33.