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NXP Semiconductors LPC1112FHN33/203,5
- Part No.:
- LPC1112FHN33/203,5
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 32-VQFN Exposed Pad
- Datasheet:
-
LPC1112FHN33/203,5.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 32HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:116
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Product details
Overview
LPC1112FHN33/203 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller in HVQFN33 package, featuring 16 kB flash, 4 kB SRAM, 28 GPIO pins, 10-bit ADC with 8-channel input multiplexing, and support for UART, I²C (Fast-mode Plus), and SPI interfaces. It operates at up to 50 MHz and targets low-power embedded control in lighting and alarm systems.
For engineers reviewing the LPC1112FHN33/203 datasheet, LPC1112FHN33/203 pinout, LPC1112FHN33/203 application, or LPC1112FHN33/203 equivalent, this page delivers verified specifications, validated pin functions, real-world use cases, and confirmed alternative parts for design-in and sourcing decisions.
Technical Context
The LPC1112FHN33/203 belongs to the LPC1100XL series, incorporating a windowed watchdog timer (WWDT), configurable open-drain GPIO mode, and power profiles stored in boot ROM for optimized performance/power trade-offs. Its clock system includes a 12 MHz ±1 % internal RC oscillator, crystal oscillator (1–25 MHz), and PLL for CPU operation up to 50 MHz.
It supports In-System Programming (ISP) and In-Application Programming (IAP) via on-chip bootloader, and features Serial Wire Debug (SWD) for development. The device implements ARM Cortex-M0 NVIC with non-maskable interrupt (NMI) capability and system tick timer for RTOS compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 32-bit RISC processor with Thumb-2 instruction set for compact code size and deterministic interrupt latency. |
| Max Clock Speed | 50 MHz - enables real-time control loops and communication stack processing without external high-frequency crystals. |
| Flash Memory | 16 kB - sufficient for firmware with UART/I²C/SPI drivers, ADC sampling routines, and basic state-machine logic. |
| SRAM | 4 kB - supports stack, heap, and peripheral buffers for concurrent UART+I²C+ADC operations. |
| GPIO Pins | 28 - all configurable as edge/level-sensitive interrupts; includes dedicated wake-up inputs and high-current sink (20 mA) on I²C pins. |
| ADC | 10-bit resolution, 8-channel multiplexed input - suitable for analog sensor monitoring (e.g., temperature, light level) in white goods and eMetering. |
| I²C Interface | Fast-mode Plus (1 Mbit/s) with multi-address recognition and monitor mode - enables robust communication with multiple slave sensors or EEPROMs. |
| Operating Voltage | 1.8 V to 3.6 V - compatible with single Li-ion battery or regulated 3.3 V supply in portable and industrial applications. |
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 compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1, 17, 32) | Power Supply | Three independent 1.8–3.6 V supply connections reduce voltage drop and improve noise immunity across core, I/O, and analog domains. |
| VSS (Pin 33) | Ground | Single exposed thermal pad ground connection - must be soldered to PCB ground plane for thermal and EMI performance. |
| RESET/PIO0_0 | Reset Input / GPIO | Active-low reset with internal pull-up; dual-function pin allows flexible board-level reset signaling or general-purpose I/O. |
| XTALIN / XTALOUT | Clock Input / Output | Supports external crystal (1–25 MHz) or ceramic resonator; XTALOUT can drive secondary clock loads. |
| SCL / SDA | I²C Bus Lines | Fast-mode Plus capable with 20 mA sink current - eliminates need for external pull-ups in many designs. |
| RXD / TXD / CTS / RTS | UART Signals | Full RS-485/EIA-485 support with fractional baud rate generation and internal FIFO - simplifies industrial serial interface implementation. |
| SWDIO / SWCLK | Debug Interface | 2-pin Serial Wire Debug - enables programming and real-time debugging using standard ARM debug probes. |
| AD[7:0] | ADC Inputs | 8-channel 10-bit analog input multiplexing - allows simultaneous monitoring of multiple sensors with shared ADC hardware. |
Key Features
| Feature | Design Value |
|---|---|
| Windowed Watchdog Timer (WWDT) | Prevents runaway code execution with time-windowed refresh requirement - critical for safety-critical alarm and metering applications. |
| Configurable Open-Drain GPIO Mode | Enables direct interface to I²C buses, wired-AND logic, and level-shifting circuits without external components. |
| Power Profiles in Boot ROM | One function call selects pre-validated low-power modes (Sleep, Deep-sleep, Deep power-down) - reduces firmware development effort for battery-powered devices. |
| High-Current Sink on I²C Pins | 20 mA per I²C pin supports strong pull-downs for Fast-mode Plus timing - ensures reliable communication at 1 Mbit/s over longer traces. |
| Non-Maskable Interrupt (NMI) | Hardware interrupt source selectable from multiple inputs - guarantees immediate response to critical events like power failure or tamper detection. |
| 12 MHz ±1 % Internal RC Oscillator | Eliminates external crystal for cost-sensitive applications while maintaining timing accuracy for UART baud rates and system clocks. |
Applications
| Smart Lighting Control | Home Security Alarm Panel |
|---|---|
Use Scenario: Dimmable LED driver with ambient light sensing and wireless status reporting. IC Role / Device Role / Timing Role: Main controller executing PWM dimming logic, reading ambient light ADC values, and managing UART-based Zigbee/Bluetooth module communication. Use Value: 28 GPIO enable direct LED channel control and sensor interfacing; 10-bit ADC provides precise lux measurement; WWDT ensures fail-safe shutdown on firmware hang. | Use Scenario: Battery-backed intrusion detection panel with door/window contact monitoring and siren activation. IC Role / Device Role / Timing Role: Central alarm controller polling magnetic reed switches, driving piezo siren, and logging events to internal flash during AC power loss. Use Value: Deep power-down mode extends battery life >1 year; NMI input triggers instant wake-up on tamper event; 16 kB flash stores encrypted event logs. |
| eMetering Data Logger | White Goods User Interface |
Use Scenario: Sub-metering unit capturing energy consumption data from CT sensors and transmitting via RS-485 to central gateway. IC Role / Device Role / Timing Role: Data acquisition MCU sampling analog inputs, performing RMS calculations, and formatting Modbus RTU frames for UART transmission. Use Value: UART with RS-485 support and fractional baud rate enables interoperability with legacy building management systems; 4 kB SRAM buffers burst sampling data. | Use Scenario: Front-panel controller for washing machine displaying cycle progress and accepting button/touch inputs. IC Role / Device Role / Timing Role: UI processor scanning membrane keypad matrix, driving 7-segment LED display, and communicating with main motor controller via I²C. Use Value: Configurable open-drain GPIO drives LED segments directly; 8-channel ADC reads potentiometer settings; 28 GPIO support 12-key matrix + display control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC1112FHN33/103 | Same 16 kB flash and 28 GPIO, but only 2 kB SRAM and no power profiles; lacks WWDT and configurable open-drain mode. | Suitable for simpler control tasks without deep sleep or advanced watchdog requirements. | Select when cost sensitivity outweighs need for low-power optimization or enhanced reliability features. |
| LPC1113FHN33/203 | 24 kB flash, 4 kB SRAM, same WWDT, power profiles, and peripherals - direct upgrade path with 8 kB more program space. | Better suited for applications requiring larger firmware (e.g., OTA updates, cryptographic libraries). | Choose when future firmware expansion or added feature sets justify higher memory footprint and BOM cost. |
Compared with LPC1112FHN33/103, the LPC1112FHN33/203 adds WWDT and power profiles for enhanced reliability and battery life; compared with LPC1113FHN33/203, it trades 8 kB flash for lower cost and smaller code footprint in resource-constrained designs.
Availability
LPC1112FHN33/203 is available at Aetrix Electronics and suitable for smart lighting control, home security alarm panels, eMetering data loggers, and white goods user interfaces requiring stable component supply and long-term industrial availability.
Supply support for LPC1112FHN33/203 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 embedded control applications replacing legacy 8/16-bit MCUs - emphasizing code density, ease of migration, and integrated analog/peripheral functionality.
FAQ
What is the maximum operating frequency of the LPC1112FHN33/203?
The LPC1112FHN33/203 operates at a maximum CPU frequency of 50 MHz. This speed is achieved using the on-chip PLL, which can be driven by either the internal 12 MHz RC oscillator or an external crystal (1–25 MHz). The 50 MHz clock enables fast interrupt response and efficient execution of communication protocols such as UART and I²C Fast-mode Plus without external clocking complexity.
Does the LPC1112FHN33/203 support In-System Programming (ISP)?
Yes, the LPC1112FHN33/203 supports In-System Programming via its built-in bootloader. Firmware updates can be performed over UART using standard ISP commands, eliminating the need for dedicated programming hardware during production or field service. The bootloader resides in protected ROM and is accessible after reset when the ISP pin is asserted, enabling robust and field-upgradable deployments of LPC1112FHN33/203-based systems.
How many ADC channels does the LPC1112FHN33/203 provide, and what is their resolution?
The LPC1112FHN33/203 integrates a 10-bit successive approximation ADC with input multiplexing across 8 pins (AD[7:0]). This configuration allows sequential sampling of up to eight analog signals - such as temperature, light, or voltage sensors - using a single ADC hardware block. The 10-bit resolution provides 1024 discrete levels, supporting accurate measurements in applications like eMetering and smart lighting control where LPC1112FHN33/203 serves as the primary sensor interface MCU.
What debug interface does the LPC1112FHN33/203 use, and how many pins are required?
The LPC1112FHN33/203 uses Serial Wire Debug (SWD), a 2-pin ARM-standard debug interface requiring SWDIO and SWCLK signals. This minimal pin count simplifies PCB layout and preserves GPIO resources for application use. SWD supports full JTAG-equivalent functionality including breakpoints, watchpoints, memory inspection, and real-time variable monitoring - making LPC1112FHN33/203 fully compatible with common ARM debug tools like Segger J-Link and CMSIS-DAP adapters.
Is the LPC1112FHN33/203 qualified for extended temperature operation?
No, the LPC1112FHN33/203 is specified for industrial temperature range of −40 °C to +85 °C ('F' grade). It is not rated for extended temperature (−40 °C to +105 °C, 'J' grade). For high-temperature environments such as under-hood automotive or industrial oven controls, designers should consider the 'J'-suffixed variants like LPC1112JHN33/203, which share identical functionality and pinout but are tested and guaranteed across the wider thermal range.
LPC1112FHN33/203,5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 32-VQFN Exposed Pad
- Series:
- LPC1100XL
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, WDT
- Number of I/O:
- 28
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LPC1112FHN33/203,5 FAQ
1.How can I place an order for LPC1112FHN33/203,5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC1112FHN33/203,5 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 LPC1112FHN33/203,5 reliable?
The price and inventory of LPC1112FHN33/203,5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC1112FHN33/203,5 is usually 5 days.
3.What payment methods are accepted for LPC1112FHN33/203,5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC1112FHN33/203,5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC1112FHN33/203,5?
LPC1112FHN33/203,5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC1112FHN33/203,5 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 LPC1112FHN33/203,5?
For technical support, including LPC1112FHN33/203,5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC1112FHN33/203,5 requirements.
6.How does Aetrix verify that LPC1112FHN33/203,5 is sourced from the original manufacturer or authorized distributors?
All LPC1112FHN33/203,5 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 LPC1112FHN33/203,5 meets industry standards.
7.What is the process for return or replacement of LPC1112FHN33/203,5?
All LPC1112FHN33/203,5 units undergo pre-shipment inspection (PSI). If there is an issue with LPC1112FHN33/203,5, 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 LPC1112FHN33/203,5 part is unused and in its original packaging.
Return procedure for LPC1112FHN33/203,5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPC1112FHN33/203,5 Tags
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