NXP Semiconductors LPC1226FBD48/301,1

Overview

LPC1226FBD48/301 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller targeting industrial automation, lighting, and eMetering applications. It operates at up to 45 MHz, integrates 96 kB flash and 8 kB SRAM, features a 10-bit 8-channel ADC, two analog comparators with programmable output feedback, and supports I²C-Fast-mode Plus (1 Mbit/s), dual UARTs (one with RS-485 support), and SSP/SPI.

For engineers reviewing the LPC1226FBD48/301 datasheet, LPC1226FBD48/301 pinout, LPC1226FBD48/301 application, or LPC1226FBD48/301 equivalent, key selection considerations include its LQFP48 package (7 × 7 mm), 39 GPIO pins, deterministic ROM-based integer division, IEC-60335 Class B-certified Windowed Watchdog Timer, and support for deep power-down wake-up via RTC or 12 port pins.

Technical Context

The LPC1226FBD48/301 implements the ARM Cortex-M0 core with Nested Vectored Interrupt Controller (NVIC) and Serial Wire Debug (SWD), delivering 1.51 CoreMark/MHz performance. Its clock system includes a 1–25 MHz crystal oscillator, 12 MHz ±1 % internal RC oscillator, and PLL enabling full-speed operation without high-frequency crystals.

Digital peripherals include a 21-channel micro-DMA controller, CRC engine, four general-purpose timers (two 32-bit, two 16-bit), and programmable GPIO with glitch filtering, open-drain mode, and high-current drive on four pins. Analog functions comprise an 8-channel 10-bit ADC and two comparators supporting 555 timer emulation via output feedback to timer match signals.

Key Specifications

Pinout & Package

LQFP48 package (SOT313-2), 7 × 7 × 1.4 mm body, 48-pin plastic low-profile quad flat package with exposed pad not specified. Pin functions are software-configurable via IOCON registers; primary debug and reset functions default after reset.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1227FBD48/301, the LPC1226FBD48/301 trades 32 kB flash for tighter BOM cost while retaining full peripheral functionality; versus LPC1115JBD48/301, it adds critical industrial features including WWDT, analog comparators, and I²C-FM+, making it suitable for safety-aware and sensor-rich designs.

Availability

LPC1226FBD48/301 is available at Aetrix Electronics and suitable for smart metering, industrial lighting control, and factory automation I/O modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for LPC1226FBD48/301 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 LPC122x product line was designed specifically for cost-sensitive, power-constrained industrial control applications requiring robust analog integration, safety certification, and field-upgradable firmware - bridging the gap between 8-bit legacy and high-end 32-bit MCUs.

FAQ

What is the maximum operating frequency of the LPC1226FBD48/301?

The LPC1226FBD48/301 operates at a maximum CPU frequency of 45 MHz when executing from flash memory with one wait state. At zero wait states, the maximum frequency is 30 MHz. This performance is validated by a CoreMark score of 1.51 per MHz, confirming deterministic real-time behavior suitable for industrial control loops.

Does the LPC1226FBD48/301 support in-system programming (ISP)?

Yes, the LPC1226FBD48/301 supports In-System Programming (ISP) and In-Application Programming (IAP) via its on-chip bootloader. This capability enables field firmware updates over UART, I²C, or USB (with external transceiver), eliminating the need for dedicated programming hardware during production or maintenance.

How many GPIO pins does the LPC1226FBD48/301 provide in its LQFP48 package?

The LPC1226FBD48/301 provides 39 General Purpose I/O pins in its LQFP48 package. All pins support programmable pull-up resistors, open-drain mode, digital input glitch filtering, and input inversion. Four of these pins (PIO0_27, PIO0_28, PIO0_29, and PIO1_0) feature high-current output drivers for direct interface with LEDs or small relays.

Is the LPC1226FBD48/301 certified for safety-critical applications?

Yes, the LPC1226FBD48/301 includes an IEC-60335 Class B certified Windowed Watchdog Timer (WWDT), which meets functional safety requirements for household and similar electrical appliances. This certification validates its use in safety-monitored systems such as energy meters and alarm panels where reliable fault detection is mandatory.

What analog peripherals are integrated into the LPC1226FBD48/301?

The LPC1226FBD48/301 integrates a 10-bit 8-channel ADC and two highly flexible analog comparators. Each comparator supports multiple inputs (up to four per unit) and programmable outputs that can trigger timer match events or emulate 555 timer behavior - enabling hardware-accelerated threshold detection and timing without CPU overhead.