NXP Semiconductors LPC1111FHN33/102K

Overview

LPC1111FHN33/102K from NXP Semiconductors is an ARM Cortex-M0 32-bit microcontroller in HVQFN33 package, delivering up to 50 MHz CPU operation, 8 kB flash, 2 kB SRAM, and integrated power profiles for low-power embedded control. It supports UART with RS-485, Fast-mode Plus I²C (1 Mbit/s), one SPI, 10-bit ADC (8-channel), and 28 GPIO pins - deployed in lighting control and alarm systems.

For engineers reviewing the LPC1111FHN33/102K datasheet, LPC1111FHN33/102K pinout, LPC1111FHN33/102K application, or LPC1111FHN33/102K equivalent, key selection factors include its HVQFN33 thermal-enhanced package, LPC1100L-series power management features, 28 GPIO with configurable open-drain mode, and compatibility with SWD debug interface.

Technical Context

The LPC1111FHN33/102K implements the ARM Cortex-M0 core with NVIC and system tick timer, operating at up to 50 MHz via internal 12 MHz RC oscillator (±1 %) or external crystal (1–25 MHz). Its clock generation includes a programmable PLL and watchdog oscillator (9.4 kHz–2.3 MHz).

It belongs to the LPC1100L series, enabling power profile optimization via boot ROM functions, windowed watchdog timer, and configurable open-drain GPIO - distinguishing it from base LPC1100 parts lacking these features. The device supports Sleep, Deep-sleep, and Deep power-down modes with wake-up on up to 13 functional pins.

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 improves heat dissipation in space-constrained lighting modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1111FHN33/102K, the /202 variant trades power management for extra RAM, while the /103 adds SPI and strengthens safety features - making the /102K optimal for cost-sensitive, low-power lighting and alarm nodes where single-SPI and boot-ROM power profiles deliver best balance.

Availability

LPC1111FHN33/102K is available at Aetrix Electronics and suitable for lighting control, alarm systems, eMetering, and white goods requiring stable component supply across extended temperature ranges (−40 °C to +85 °C).

Supply support for LPC1111FHN33/102K 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 was designed for cost-sensitive 8/16-bit MCU replacement in resource-constrained embedded systems, emphasizing low power, small footprint, and rapid time-to-market through ARM Cortex-M0 simplicity and NXP's mature toolchain support.

FAQ

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

The LPC1111FHN33/102K operates at up to 50 MHz CPU frequency. This is achieved using either the internal 12 MHz RC oscillator (trimmed to ±1 % accuracy) or an external crystal (1–25 MHz) with an integrated PLL. The 50 MHz limit applies across the full industrial temperature range (−40 °C to +85 °C) and 1.8–3.6 V supply, ensuring deterministic real-time performance in lighting and alarm applications.

Does the LPC1111FHN33/102K support SWD debugging?

Yes, the LPC1111FHN33/102K supports Serial Wire Debug (SWD) via dedicated SWCLK and SWDIO pins (PIO0_10 and PIO1_3). These pins are multiplexed with GPIO and ADC functions but default to debug mode on power-up. SWD enables full breakpoint, step-through, and memory inspection capabilities using standard tools like LPC-Link2 or J-Link, with no additional hardware required beyond a two-wire connection.

How many ADC channels does the LPC1111FHN33/102K provide?

The LPC1111FHN33/102K integrates a 10-bit successive-approximation ADC with 8 input channels (AD0–AD7), accessible on dedicated pins in the HVQFN33 package. All 8 channels are simultaneously available and selectable via software-controlled multiplexer. The ADC supports burst mode, hardware trigger from timers, and conversion completion interrupts - enabling synchronized sampling in motor control or environmental monitoring applications using the LPC1111FHN33/102K.

What power management features are included in the LPC1111FHN33/102K?

The LPC1111FHN33/102K includes Sleep, Deep-sleep, and Deep power-down modes managed by an integrated PMU. As an LPC1100L-series part, it implements boot ROM power profiles - allowing one API call to configure optimal clock gating, peripheral disable, and wake-up sources. It also features a programmable windowed watchdog timer, brownout detection with four thresholds, and wake-up from Deep-sleep on up to 13 GPIO pins - all critical for battery-operated alarm systems built around the LPC1111FHN33/102K.

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

Yes, the LPC1111FHN33/102K shares identical pinout and package dimensions (7 × 7 × 0.85 mm HVQFN33) with all other FHN33-suffixed LPC111x parts, including LPC1111FHN33/101, /103, /201, /202, /203, and LPC1112FHN33 variants. Pin functions are consistent across these parts; differences lie only in flash/SRAM size, power profile availability, and peripheral enablement - enabling hardware reuse across product variants without PCB redesign.