NXP Semiconductors LPC1112FHI33/202,5

Overview

LPC1112FHI33/202 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller in a 5×5 mm HVQFN33 package, featuring 16 kB flash, 4 kB SRAM, one UART with RS-485 support, one I²C-bus interface (Fast-mode Plus), four general-purpose timers, and a 10-bit ADC with eight input channels - deployed in lighting control and alarm system firmware.

For engineers reviewing the LPC1112FHI33/202 datasheet, LPC1112FHI33/202 pinout, LPC1112FHI33/202 application, or LPC1112FHI33/202 equivalent, key selection criteria include its 5×5 mm HVQFN33 footprint, LPC1100L-series power profiles, windowed watchdog timer, configurable open-drain GPIO, and 1.8–3.6 V single-supply operation for space-constrained industrial embedded designs.

Technical Context

The LPC1112FHI33/202 implements an ARM Cortex-M0 core with Nested Vectored Interrupt Controller (NVIC) and Serial Wire Debug (SWD), 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 multiple clock output options (CPU, IRC, watchdog, system oscillator).

It belongs to the LPC1100L series, enabling power optimization through boot-ROM-resident power profiles and supporting three low-power modes: Sleep, Deep-sleep, and Deep power-down - with wake-up capability on up to 13 functional pins and brownout detection across four thresholds.

Key Specifications

Pinout & Package

HVQFN33 package: 5 mm × 5 mm × 0.85 mm body, 33 terminals, no leads, thermal-enhanced construction for compact PCB layouts and improved heat dissipation in enclosed lighting modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1112FHN33/202, the LPC1112FHI33/202 offers superior thermal performance and smaller PCB area; compared with LPC1112FHI33/203, it trades one SPI interface for lower cost and identical power management - ideal for cost-optimized lighting controllers.

Availability

LPC1112FHI33/202 is available at Aetrix Electronics and suitable for lighting control, alarm systems, white goods UI panels, and eMetering subsystems requiring stable component supply and long-term industrial availability.

Supply support for LPC1112FHI33/202 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 applications.

The LPC111x family targets cost-sensitive 8/16-bit replacement use cases, emphasizing low power, small footprint, and integrated peripherals - designed specifically for lighting, security, and appliance control where MCU resources must be tightly balanced against bill-of-materials cost.

FAQ

What is the maximum operating frequency of the LPC1112FHI33/202?

The LPC1112FHI33/202 operates at a maximum CPU frequency of 50 MHz. This speed 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 clock enables deterministic real-time execution in lighting PWM control and alarm event response loops within the LPC1112FHI33/202.

Does the LPC1112FHI33/202 support I²C Fast-mode Plus?

Yes, the LPC1112FHI33/202 includes a hardware I²C-bus interface compliant with Fast-mode Plus (1 Mbit/s), supporting multiple address recognition and monitor mode. This capability is confirmed for the LPC1100L series, to which the LPC1112FHI33/202 belongs, and enables high-speed communication with environmental sensors and EEPROMs without external level shifters - a verified feature in the official NXP LPC111x datasheet Rev. 9.2.

How many ADC channels does the LPC1112FHI33/202 provide?

The LPC1112FHI33/202 integrates a 10-bit analog-to-digital converter with multiplexing across eight input channels (AD0–AD7), accessible on dedicated GPIO pins. This matches the specification for HVQFN33-packaged LPC1100L devices in Table 2 of the datasheet. The eight-channel capability supports simultaneous sampling of temperature, light, and proximity sensors in alarm system sensor hubs using the LPC1112FHI33/202.

What low-power modes are supported by the LPC1112FHI33/202?

The LPC1112FHI33/202 supports three reduced-power modes: Sleep, Deep-sleep, and Deep power-down. As an LPC1100L-series device, it implements power profiles stored in boot ROM for runtime optimization and enables wake-up from Deep-sleep via up to 13 functional GPIO pins. These capabilities are documented in Section 2 "Features and benefits" and validated for the LPC1112FHI33/202 in the NXP LPC111x datasheet Rev. 9.2.

Is the LPC1112FHI33/202 pin-compatible with other HVQFN33 variants in the LPC111x family?

The LPC1112FHI33/202 shares the same 33-terminal HVQFN33 pinout with other 5×5 mm variants like LPC1112FHI33/102 and LPC1112FHI33/203, as confirmed by Figure 6 and Table 9 in the datasheet. However, functional differences exist - such as presence of power profiles and windowed WDT - meaning firmware and peripheral initialization must be validated per variant. Pin compatibility does not imply full functional equivalence across all LPC1112FHI33/xxx suffixes.