NXP Semiconductors LPC1111FHN33/101,5

Overview

LPC1111FHN33/101 from NXP Semiconductors is an ARM Cortex-M0 32-bit microcontroller in a 33-terminal HVQFN package, delivering up to 50 MHz CPU operation, 8 kB flash, 2 kB SRAM, and integrated peripherals including UART, I²C-bus (Fast-mode Plus), SPI, 10-bit ADC, and four general-purpose timers. It serves as a low-power, cost-optimized replacement for 8/16-bit MCUs in space-constrained industrial control nodes.

For engineers reviewing the LPC1111FHN33/101 datasheet, LPC1111FHN33/101 pinout, LPC1111FHN33/101 application, or LPC1111FHN33/101 equivalent, key selection criteria include its HVQFN33 thermal-enhanced footprint, absence of power profiles (LPC1100 series), single SPI interface, and 28 GPIO capability - critical for compact sensor interface and metering designs requiring minimal board area.

Technical Context

The LPC1111FHN33/101 implements the ARM Cortex-M0 core with Nested Vectored Interrupt Controller (NVIC) and Serial Wire Debug (SWD), operating at up to 50 MHz via internal 12 MHz RC oscillator (±1 %) or external crystal (1–25 MHz). Its clock system includes PLL support and programmable watchdog oscillator (9.4 kHz–2.3 MHz).

Peripheral integration includes one UART with RS-485 support and fractional baud rate generation, one Fast-mode Plus I²C-bus interface (1 Mbit/s), one SPI controller with FIFO, four counter/timers (two 32-bit, two 16-bit), and a 10-bit ADC with 8-channel input multiplexing - all mapped to 28 GPIO pins on the HVQFN33 package.

Key Specifications

Pinout & Package

HVQFN33 (plastic thermal enhanced very thin quad flat package; no leads; 33 terminals; body 7 × 7 × 0.85 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1111FHN33/101, the /102 variant adds runtime power optimization and secure watchdog features at no pinout or layout change, while the /101-based LPC1112FHN33 offers double flash capacity for complex control logic - both maintain identical HVQFN33 footprint and peripheral mapping.

Availability

LPC1111FHN33/101 is available at Aetrix Electronics and suitable for smart lighting control, industrial sensor nodes, home security panels, and energy meter interfaces requiring stable component supply across production lifecycles.

Supply support for LPC1111FHN33/101 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The LPC111x series targets cost-sensitive, low-power embedded control applications - designed to replace legacy 8/16-bit MCUs with ARM Cortex-M0 efficiency, simplified toolchain support, and integrated analog/digital peripherals in compact packages.

FAQ

What is the maximum operating frequency of the LPC1111FHN33/101?

The LPC1111FHN33/101 operates at a maximum CPU frequency of 50 MHz. This is achieved using either the internal 12 MHz RC oscillator (trimmed to ±1 % accuracy) with PLL multiplication or an external crystal oscillator (1–25 MHz). The 50 MHz clock enables fast execution of real-time control tasks and high-bandwidth peripheral handling without requiring external high-frequency clock sources.

Does the LPC1111FHN33/101 support power profile optimization?

No, the LPC1111FHN33/101 belongs to the base LPC1100 series and does not include power profiles in boot ROM. Power profile functionality - enabling runtime performance/power trade-offs via a single API call - is exclusive to LPC1100L and LPC1100XL series variants such as LPC1111FHN33/102 or LPC1111FHN33/103. The LPC1111FHN33/101 supports Sleep, Deep-sleep, and Deep power-down modes but lacks programmable power state selection.

How many ADC channels does the LPC1111FHN33/101 support?

The LPC1111FHN33/101 integrates a 10-bit successive approximation ADC with input multiplexing across 8 pins (AD[7:0]). All eight channels are accessible on the HVQFN33 package, enabling simultaneous monitoring of multiple analog signals such as temperature, light intensity, or supply voltage without external multiplexers. Conversion is triggered by software, timer match, or external event.

What communication interfaces are available on the LPC1111FHN33/101?

The LPC1111FHN33/101 provides one UART with RS-485 support and fractional baud rate generation, one Fast-mode Plus I²C-bus interface (1 Mbit/s), and one SPI controller with FIFO and multi-protocol capability. It does not include a second SPI interface - that feature is reserved for LQFP48-package variants like LPC1113FBD48/301. All three interfaces share GPIO resources and are fully configurable via IOCON registers.

Is the LPC1111FHN33/101 pin-compatible with other LPC111x HVQFN33 variants?

Yes, the LPC1111FHN33/101 shares identical pinout and package dimensions (HVQFN33, 7 × 7 × 0.85 mm) with all other LPC111x variants in the same package family - including LPC1111FHN33/102, LPC1112FHN33/101, and LPC1114FHN33/201. Pin functions are consistent across these parts; differences lie only in flash/SRAM size, power features, and peripheral enablement - verified in Tables 9 and 11 of the official datasheet.