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NXP Semiconductors LPC1111FHN33/103

Name: LPC1111FHN33/103
Brand: NXP Semiconductors
SKU: LPC1111FHN33/103
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LPC1111FHN33/103

Manufacturer:: NXP Semiconductors

Category:: Microcontrollers

Package:: 32-VQFN Exposed Pad

Datasheet:: LPC1111FHN33/103.pdf

Description:: IC MCU 32BIT 8KB FLASH 32HVQFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LPC1111FHN33/103 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), two SPI controllers, a 10-bit ADC with 8 input channels, and a windowed watchdog timer - deployed in smart lighting control systems requiring compact footprint and low-power operation.

For engineers reviewing the LPC1111FHN33/103 datasheet, LPC1111FHN33/103 pinout, LPC1111FHN33/103 application, or LPC1111FHN33/103 equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in metering and alarm systems, and confirmed alternative parts for design continuity and supply resilience.

Technical Context

The LPC1111FHN33/103 implements the ARM Cortex-M0 core with Nested Vectored Interrupt Controller (NVIC) and supports CPU operation up to 50 MHz via internal RC oscillator (1 % trimmed) or external crystal (1–25 MHz), with PLL for frequency scaling. It integrates a programmable windowed watchdog timer (WWDT) and power management unit enabling Sleep, Deep-sleep, and Deep power-down modes.

Its peripheral set includes a 10-bit ADC with multiplexed inputs across 8 pins, dual SPI controllers with FIFO and multi-protocol capability, and Fast-mode Plus I²C (1 Mbit/s) with monitor mode and multiple address recognition - all accessible through its 33-terminal HVQFN package with 28 functional GPIOs.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	ARM Cortex-M0, 32-bit RISC, up to 50 MHz - enables efficient execution of real-time control tasks with minimal code size vs. legacy 8/16-bit MCUs.
Flash Memory	8 kB on-chip flash - sufficient for bootloader + compact firmware in space-constrained embedded applications like sensor nodes.
SRAM	2 kB SRAM - supports stack, heap, and data buffers for concurrent peripheral handling without external memory.
GPIO Pins	28 general-purpose I/O pins with configurable pull-up/pull-down and open-drain mode - allows direct interfacing with switches, LEDs, and digital sensors.
ADC	10-bit successive approximation ADC with 8 input channels - provides sufficient resolution for analog sensing in lighting dimming or temperature monitoring.
I²C Interface	Fast-mode Plus I²C (1 Mbit/s) with monitor mode - enables high-speed communication with EEPROMs, sensors, and display drivers while supporting bus diagnostics.
UART	RS-485/EIA-485 UART with fractional baud rate generation and internal FIFO - supports robust long-distance industrial serial communication.
Package	HVQFN33 (7 × 7 × 0.85 mm, no leads) - offers thermal efficiency and PCB area savings over QFP packages in compact consumer and industrial modules.

Pinout & Package

HVQFN33 package: plastic thermal-enhanced very thin quad flat package, 33 terminals, body size 7 mm × 7 mm × 0.85 mm, exposed thermal pad, leadless construction.

Pin/Terminal	Circuit Role	Design Meaning
VDD (Pins 1, 17, 32)	Power supply	Single 1.8 V–3.6 V supply rail; three dedicated VDD pins ensure stable core and I/O voltage distribution.
VSS (Pin 33)	Ground	Common reference for analog/digital domains; exposed thermal pad must be connected to ground plane for thermal performance.
RESET/PIO0_0	Reset input / GPIO	Active-low reset with internal pull-up; doubles as general-purpose I/O after boot, supporting system recovery logic.
XTALIN / XTALOUT	Clock input/output	Supports external crystal (1–25 MHz) or ceramic resonator; enables precise timing for UART baud rates and ADC sampling clocks.
SWDIO / SWCLK	Debug interface	Two-pin Serial Wire Debug (SWD) for programming and real-time debugging without JTAG overhead.
PIO0_1/CLKOUT	Programmable clock output	Outputs system oscillator, IRC, CPU, or watchdog clock - useful for synchronizing external peripherals or clock validation.
PIO1_6/RXD & PIO1_7/TXD	UART receive/transmit	Dedicated full-duplex UART pins with hardware flow control (CTS/RTS available on other pins) - essential for RS-485 transceiver interfacing.
PIO0_4/SCL & PIO0_5/SDA	I²C bus signals	Fully compliant Fast-mode Plus I²C interface with 1 Mbit/s capability and multi-address recognition - suitable for sensor hub architectures.
PIO0_2/SSEL0, PIO0_8/MISO0, PIO0_9/MOSI0, PIO0_6/SCK0	SPI0 interface	Four-pin SPI master/slave interface with hardware chip select - enables communication with flash memory, displays, or digital potentiometers.
PIO1_3/AD4, PIO1_4/AD5, PIO1_11/AD7, etc.	ADC input channels	Eight 10-bit ADC inputs mapped across GPIO pins - allows simultaneous monitoring of multiple analog sources (e.g., light intensity, voltage rails).

Key Features

Feature	Design Value
Windowed Watchdog Timer (WWDT)	Prevents runaway code execution with time-windowed refresh requirement - critical for fail-safe operation in alarm and metering systems.
Power Profiles in Boot ROM	One function call selects optimized power/performance trade-offs - simplifies low-power design for battery-operated lighting controllers.
Configurable Open-Drain Mode	Enables wired-AND logic and I²C-compatible signaling on GPIOs - eliminates need for external pull-ups in multi-master bus designs.
High-Current GPIO Drivers	20 mA sink capability on I²C pins - directly drives LEDs or small relays without external drivers in space-limited modules.
Serial Wire Debug (SWD)	Two-pin debug interface with full programming and trace capability - reduces test point count and simplifies production programming.
Non-Maskable Interrupt (NMI)	Hardware interrupt source selectable from multiple inputs - ensures immediate response to critical events like power failure or tamper detection.

Applications

Smart Lighting Control	Energy Metering Interface
Use Scenario: Dimmable LED driver with ambient light sensing and DALI/KNX gateway functionality. IC Role / Device Role / Timing Role: Main system controller executing PWM generation, ADC-based lux measurement, and UART-based protocol translation. Use Value: 28 GPIOs accommodate multiple LED channels and sensor interfaces; 10-bit ADC resolves fine-grained brightness adjustments; WWDT ensures reliable operation during firmware updates.	Use Scenario: Sub-metering node collecting voltage, current, and energy data in HVAC subsystems. IC Role / Device Role / Timing Role: Data acquisition and local preprocessing unit interfacing with shunt-based current sensors and isolated UART to main controller. Use Value: 8 kB flash stores calibration tables and communication stacks; RS-485 UART enables noise-immune data transmission over 100+ meters; low-power modes extend battery life in wireless variants.
Security Alarm Panel	White Goods UI Module
Use Scenario: Zone monitoring and keypad scanning in residential intrusion detection systems. IC Role / Device Role / Timing Role: Peripheral manager handling door/window contact inputs, siren drive, and LCD backlight control. Use Value: 28 GPIOs support 16-zone inputs plus outputs for sirens and status LEDs; NMI input triggers immediate response to forced entry; open-drain mode simplifies wired zone wiring.	Use Scenario: Touchless control panel for washing machines with capacitive buttons and status indicators. IC Role / Device Role / Timing Role: Human-machine interface processor managing button debouncing, LED feedback, and I²C communication with main MCU. Use Value: Fast-mode Plus I²C (1 Mbit/s) ensures responsive display updates; 2 kB SRAM buffers touch event queues; HVQFN33 footprint fits tight front-panel layouts.

Smart Lighting Control

Energy Metering Interface

Use Scenario: Dimmable LED driver with ambient light sensing and DALI/KNX gateway functionality.

IC Role / Device Role / Timing Role: Main system controller executing PWM generation, ADC-based lux measurement, and UART-based protocol translation.

Use Value: 28 GPIOs accommodate multiple LED channels and sensor interfaces; 10-bit ADC resolves fine-grained brightness adjustments; WWDT ensures reliable operation during firmware updates.

Use Scenario: Sub-metering node collecting voltage, current, and energy data in HVAC subsystems.

IC Role / Device Role / Timing Role: Data acquisition and local preprocessing unit interfacing with shunt-based current sensors and isolated UART to main controller.

Use Value: 8 kB flash stores calibration tables and communication stacks; RS-485 UART enables noise-immune data transmission over 100+ meters; low-power modes extend battery life in wireless variants.

Security Alarm Panel

White Goods UI Module

Use Scenario: Zone monitoring and keypad scanning in residential intrusion detection systems.

IC Role / Device Role / Timing Role: Peripheral manager handling door/window contact inputs, siren drive, and LCD backlight control.

Use Value: 28 GPIOs support 16-zone inputs plus outputs for sirens and status LEDs; NMI input triggers immediate response to forced entry; open-drain mode simplifies wired zone wiring.

Use Scenario: Touchless control panel for washing machines with capacitive buttons and status indicators.

IC Role / Device Role / Timing Role: Human-machine interface processor managing button debouncing, LED feedback, and I²C communication with main MCU.

Use Value: Fast-mode Plus I²C (1 Mbit/s) ensures responsive display updates; 2 kB SRAM buffers touch event queues; HVQFN33 footprint fits tight front-panel layouts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LPC1112FHN33/103	16 kB flash, 2 kB SRAM, same package and peripheral set - adds 8 kB program storage for larger firmware or bootloader features.	Preferred where field-upgradable firmware or secure boot is required, e.g., in certified metering devices.	Select when additional flash headroom is needed without changing PCB layout or software architecture.
LPC1111FHN33/203	Same 8 kB flash but 4 kB SRAM - doubles RAM capacity for applications needing larger buffers or RTOS task stacks.	Better suited for real-time audio processing or multi-threaded sensor fusion in white goods UIs.	Choose when memory bandwidth or multitasking demands exceed 2 kB SRAM, especially with FreeRTOS or CMSIS-RTOS.

Compared with LPC1111FHN33/103, LPC1112FHN33/103 offers more flash for complex protocols or encryption, while LPC1111FHN33/203 provides double the SRAM for buffer-intensive tasks - both retain identical pinout, peripherals, and power profiles, enabling drop-in upgrades in most designs.

Availability

LPC1111FHN33/103 is available at Aetrix Electronics and suitable for smart lighting control, energy metering interface, security alarm panels, and white goods UI modules requiring stable component supply and long-term industrial availability.

Supply support for LPC1111FHN33/103 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 32-bit embedded applications, delivering ARM Cortex-M0 performance with ultra-low power consumption and simplified toolchain support - designed specifically for migration from 8/16-bit microcontrollers in consumer and industrial controls.

FAQ

What is the maximum operating frequency of the LPC1111FHN33/103?

The LPC1111FHN33/103 operates at CPU frequencies up to 50 MHz, achievable using either the internal 12 MHz RC oscillator (trimmed to ±1 % accuracy) or an external crystal (1–25 MHz) with PLL multiplication. This frequency supports real-time control loops and communication stacks without external clock sources.

Does the LPC1111FHN33/103 support RS-485 communication?

Yes, the LPC1111FHN33/103 includes a UART with built-in RS-485/EIA-485 support, including fractional baud rate generation and hardware flow control (CTS/RTS). When paired with an external RS-485 transceiver, it enables robust half-duplex communication over distances exceeding 1,200 meters.

How many ADC input channels does the LPC1111FHN33/103 provide?

The LPC1111FHN33/103 features a 10-bit ADC with input multiplexing across 8 pins (AD0–AD7), all accessible on the HVQFN33 package. These channels support single-ended measurements with programmable sample rates, making them suitable for analog sensor interfacing in lighting and metering applications.

Is the LPC1111FHN33/103 pin-compatible with other LPC111x HVQFN33 variants?

Yes, the LPC1111FHN33/103 shares identical pinout and package dimensions with all LPC111x family members in HVQFN33 (e.g., LPC1112FHN33/103, LPC1114FHN33/203), including matching power, ground, debug, and peripheral signal assignments - enabling hardware reuse across firmware variants.

What power-saving modes are supported by the LPC1111FHN33/103?

The LPC1111FHN33/103 supports three reduced-power modes: Sleep (CPU halted, peripherals active), Deep-sleep (CPU and most clocks off, SRAM retained), and Deep power-down (full retention loss except for wake-up logic). Wake-up from Deep-sleep is possible via up to 13 GPIOs configured as edge/level-sensitive interrupts.

LPC1111FHN33/103 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Package/Case:: 32-VQFN Exposed Pad

Series:: LPC11xx

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Core Processor:: ARM® Cortex®-M0

Core Size:: 32-Bit

Speed:: 50MHz

Connectivity:: I2C, SPI, UART/USART

Peripherals:: Brown-out Detect/Reset, POR, WDT

Number of I/O:: 28

Program Memory Size:: 8KB (8K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 2K x 8

Voltage - Supply (Vcc/Vdd):: 1.8V ~ 3.6V

Data Converters:: A/D 8x10b SAR

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

LPC1111FHN33/103 FAQ

1.How can I place an order for LPC1111FHN33/103 through Aetrix?

Please submit a Request for Quotation (RFQ) for LPC1111FHN33/103 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LPC1111FHN33/103 reliable?

The price and inventory of LPC1111FHN33/103 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC1111FHN33/103 is usually 5 days.

3.What payment methods are accepted for LPC1111FHN33/103?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC1111FHN33/103 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LPC1111FHN33/103?

LPC1111FHN33/103 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LPC1111FHN33/103 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LPC1111FHN33/103?

For technical support, including LPC1111FHN33/103 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC1111FHN33/103 requirements.

6.How does Aetrix verify that LPC1111FHN33/103 is sourced from the original manufacturer or authorized distributors?

All LPC1111FHN33/103 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LPC1111FHN33/103 meets industry standards.

7.What is the process for return or replacement of LPC1111FHN33/103?

All LPC1111FHN33/103 units undergo pre-shipment inspection (PSI). If there is an issue with LPC1111FHN33/103, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LPC1111FHN33/103 part is unused and in its original packaging.

Return procedure for LPC1111FHN33/103:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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