NXP Semiconductors LPC1111FHN33/102,5

Overview

LPC1111FHN33/102 from NXP Semiconductors is an ARM Cortex-M0 32-bit microcontroller in HVQFN33 package, featuring 8 kB flash, 2 kB SRAM, 28 GPIO pins, one UART with RS-485 support, one I²C-bus interface (Fast-mode Plus), and a 10-bit ADC with 8 input channels - deployed in lighting control and alarm system firmware.

For engineers reviewing the LPC1111FHN33/102 datasheet, LPC1111FHN33/102 pinout, LPC1111FHN33/102 application, or LPC1111FHN33/102 equivalent, this page delivers verified technical context, package-specific pin roles, power profile capabilities, and validated alternative options for industrial embedded design.

Technical Context

The LPC1111FHN33/102 implements the ARM Cortex-M0 core with Nested Vectored Interrupt Controller (NVIC) and operates at up to 50 MHz CPU frequency using internal RC oscillator (1 % trimmed) or external crystal (1–25 MHz). It integrates a programmable windowed watchdog timer and supports Sleep, Deep-sleep, and Deep power-down modes via its on-chip PMU.

Digital peripherals include four general-purpose timers (two 32-bit, two 16-bit), edge/level-sensitive GPIO interrupts, and configurable open-drain mode on all GPIOs. Analog functionality centers on an 8-channel 10-bit ADC with multiplexed inputs, while serial interfaces comprise one UART with fractional baud rate generation and FIFO, one Fast-mode Plus I²C-bus (1 Mbit/s), and one SPI controller with SSP features.

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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1111FHN33/102, the /202 variant adds 2 kB SRAM for deeper buffering without altering flash or peripherals, while the /102 variant of LPC1112 doubles flash capacity for complex control algorithms - both retain identical HVQFN33 pinout and power profile support.

Availability

LPC1111FHN33/102 is available at Aetrix Electronics and suitable for lighting control, alarm systems, and eMetering applications requiring stable component supply, long-term lifecycle assurance, and industrial-grade temperature range (−40 °C to +85 °C).

Supply support for LPC1111FHN33/102 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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The LPC111x series targets cost-sensitive 8/16-bit replacement applications, delivering ARM Cortex-M0 performance with ultra-low power consumption, integrated analog peripherals, and simplified toolchain support for rapid embedded development.

FAQ

What is the maximum operating frequency of the LPC1111FHN33/102?

The LPC1111FHN33/102 operates at a maximum CPU frequency of 50 MHz. This speed is achievable using either the internal 12 MHz RC oscillator (trimmed to ±1 % accuracy) or an external crystal oscillator ranging from 1 MHz to 25 MHz, with optional PLL multiplication. The 50 MHz clock drives all peripherals synchronously, enabling deterministic real-time response in time-critical applications such as lighting dimming or alarm event processing.

Does the LPC1111FHN33/102 support In-Application Programming (IAP)?

Yes, the LPC1111FHN33/102 supports In-Application Programming via its on-chip bootloader. This allows firmware updates to be performed while the device is running - for example, over UART or I²C - without requiring an external programmer. The IAP functionality is accessible through documented API calls in the boot ROM, enabling secure and field-upgradable firmware in products like smart meters and alarm panels where physical access is limited.

What is the ADC resolution and channel count on the LPC1111FHN33/102?

The LPC1111FHN33/102 integrates a 10-bit successive approximation ADC with 8 multiplexed input channels (AD[7:0]). These channels are available on the HVQFN33 package and support programmable sample rates, burst mode, and selectable reference sources (VDD or internal bandgap). The ADC is commonly used for sensor signal acquisition in white goods and lighting systems, delivering ±1 LSB integral nonlinearity and monotonicity across its full range.

Is the LPC1111FHN33/102 pin-compatible with other LPC111x HVQFN33 variants?

Yes, the LPC1111FHN33/102 shares identical pinout and package dimensions (HVQFN33, 7 × 7 × 0.85 mm) with all other LPC111x family members in the same package variant, including LPC1111FHN33/101, /103, /201, /202, /203, and LPC1112FHN33/102. This enables drop-in replacement during prototyping or production ramp-up, provided firmware and power requirements align with the specific variant's flash, SRAM, and feature set.

What power-saving modes does the LPC1111FHN33/102 support?

The LPC1111FHN33/102 supports three reduced-power modes: Sleep, Deep-sleep, and Deep power-down. In Deep-sleep mode, current consumption drops below 100 µA while retaining SRAM and register contents, with wake-up possible via up to 13 GPIO pins or RTC alarm. Deep power-down reduces current to ~1 µA but requires full reset on wake-up. These modes are managed by the integrated Power Management Unit (PMU) and are activated via CMSIS-compliant APIs, making them ideal for battery-powered alarm sensors and portable lighting controllers.