NXP Semiconductors LPC1112FHN33/102,5

Overview

LPC1112FHN33/102 from NXP Semiconductors is an ARM Cortex-M0-based 32-bit microcontroller in HVQFN33 package, delivering up to 50 MHz CPU operation, 16 kB flash, 2 kB SRAM, and integrated peripherals including UART with RS-485 support, Fast-mode Plus I²C (1 Mbit/s), four timers, 10-bit ADC (8 channels), and 28 GPIO pins. It targets low-power industrial control and sensor interface applications requiring compact footprint and deterministic real-time response.

For engineers reviewing the LPC1112FHN33/102 datasheet, LPC1112FHN33/102 pinout, LPC1112FHN33/102 application, or LPC1112FHN33/102 equivalent, key selection criteria include its LPC1100L-series power profiles for active/sleep optimization, pseudo open-drain GPIO capability, internal 12 MHz RC oscillator trimmed to ±1%, and compatibility with NXP's ISP/IAP bootloader for field firmware updates.

Technical Context

The LPC1112FHN33/102 implements the ARMv6-M architecture with NVIC, Serial Wire Debug, and system tick timer. Its clock system supports multiple sources: internal 12 MHz IRC (±1%), external crystal (1–25 MHz), watchdog oscillator (7.8 kHz–1.8 MHz), and optional PLL for full 50 MHz operation.

Power management includes Sleep, Deep-sleep, and Deep power-down modes managed by an integrated PMU; wake-up from Deep-sleep is supported via up to 13 functional pins. The device belongs to the LPC1100L series, enabling programmable power profiles and internal pull-up resistors tied to full VDD level.

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 LPC1112FHN33/102, the /202 variant offers doubled SRAM for complex firmware without layout change, while the /102 variant in 5×5 mm HVQFN reduces footprint by ~50% - both retain identical peripheral configuration, power profiles, and debug interface.

Availability

LPC1112FHN33/102 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart lighting controllers, and energy meter front-ends requiring stable component supply across extended production lifecycles.

Supply support for LPC1112FHN33/102 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 family was designed specifically for cost-sensitive, low-power 32-bit replacement of legacy 8/16-bit microcontrollers in industrial control, sensor interfacing, and simple HMI applications - emphasizing ease of migration, small code size, and integrated power management.

FAQ

What is the maximum operating frequency of the LPC1112FHN33/102?

The LPC1112FHN33/102 operates at a maximum CPU frequency of 50 MHz. This is achieved using the on-chip PLL driven by either the internal 12 MHz RC oscillator or an external crystal (1–25 MHz). The core maintains full performance across its specified −40 °C to +85 °C temperature range without derating.

Does the LPC1112FHN33/102 support in-application programming (IAP)?

Yes, the LPC1112FHN33/102 supports In-Application Programming via its on-chip bootloader. It implements page-erase IAP commands only in LPC1100XL variants; however, the LPC1112FHN33/102 belongs to the LPC1100L series and supports standard ISP and limited IAP functions - full page-erase capability requires upgrading to an XL-series part such as LPC1112FHN33/103.

What are the key differences between LPC1112FHN33/102 and LPC1112FHN33/202?

The LPC1112FHN33/102 and LPC1112FHN33/202 share identical package, pinout, flash size (16 kB), and peripheral set. Their primary difference is SRAM capacity: the /102 variant has 2 kB SRAM, while the /202 variant provides 4 kB. Both belong to the LPC1100L series and support the same power profiles and GPIO features.

Can the LPC1112FHN33/102 operate without an external crystal?

Yes, the LPC1112FHN33/102 can operate without an external crystal. Its internal 12 MHz RC oscillator is factory-trimmed to ±1% accuracy and may be used directly as the system clock source. This eliminates BOM cost and board space for crystal components in applications where precise timing (e.g., USB, audio) is not required.

Which development tools are officially supported for the LPC1112FHN33/102?

NXP officially supports LPCXpresso IDE, MCUXpresso SDK, and LPC-Link2 debug probe for the LPC1112FHN33/102. The device is compatible with ARM GCC toolchains and OpenOCD for debugging via SWD interface. Reference schematics and pinout diagrams are provided in UM10398, and example projects for UART, I²C, and timer peripherals are included in the MCUXpresso SDK v2.10+.