NXP Semiconductors LPC1226FBD64/301,1

Overview

LPC1226FBD64/301 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller operating at up to 45 MHz, featuring 96 kB flash, 8 kB SRAM, a 10-bit 8-channel ADC, two analog comparators, two UARTs (one with RS-485 support), I²C-Fast-mode Plus (1 Mbit/s), SSP/SPI, and 55 GPIO pins in a 64-pin LQFP package. It targets factory automation control nodes requiring deterministic real-time response and low-power operation.

For engineers reviewing the LPC1226FBD64/301 datasheet, LPC1226FBD64/301 pinout, LPC1226FBD64/301 application, or LPC1226FBD64/301 equivalent, key selection criteria include its 96 kB flash capacity, dual UART with hardware flow control, I²C Fast-mode Plus compliance, 55 GPIO with programmable glitch filtering, and IEC-60335 Class B certified Windowed Watchdog Timer for safety-critical industrial firmware.

Technical Context

The LPC1226FBD64/301 implements the ARM Cortex-M0 core with Nested Vectored Interrupt Controller (NVIC) and Serial Wire Debug (SWD), delivering 1.51 CoreMark/MHz performance. Its memory subsystem includes 96 kB on-chip flash with 512-byte page erase and 8 kB SRAM, enabling efficient EEPROM emulation and in-field firmware updates via ISP/IAP.

Peripheral integration centers on deterministic timing and mixed-signal control: dual UARTs support fractional baud rate generation and IrDA/RS-485 modes; the I²C interface meets Fast-mode Plus (1 Mbit/s) with multi-address recognition and programmable glitch filtering; two analog comparators provide timer-triggered outputs and 555-timer emulation capability via ROSC.

Key Specifications

Pinout & Package

LPC1226FBD64/301 uses a 64-pin LQFP package (SOT314-2), 10 mm × 10 mm × 1.4 mm body, with 3.3 V supply (VDD(3V3) and VDD(IO)), dual ground planes (VSS and VSSIO), and dedicated RTC oscillator pins (RTCXIN/RTCXOUT).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1227FBD64/301, the LPC1226FBD64/301 trades 32 kB flash for identical real-time peripherals and safety features; versus LPC1115JBD48/302, it delivers 3× more flash, 2× more SRAM, 7-pin larger package, and critical analog comparator outputs - making it optimal for industrial edge nodes requiring firmware resilience and mixed-signal responsiveness.

Availability

LPC1226FBD64/301 is available at Aetrix Electronics and suitable for eMetering, lighting control, and industrial networking applications requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for LPC1226FBD64/301 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 leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in ARM-based microcontrollers and safety-certified peripherals.

The LPC122x product line was designed specifically for cost-sensitive industrial control applications demanding high reliability, low power consumption, and integrated analog/mixed-signal capabilities - including IEC-60335 certification readiness and deterministic real-time behavior.

FAQ

What is the maximum operating frequency of the LPC1226FBD64/301?

The LPC1226FBD64/301 operates at a maximum CPU frequency of 45 MHz when executing from flash memory with one wait state. This frequency is achieved using the on-chip PLL driven by either the internal 12 MHz RC oscillator (trimmed to ±1 %) or an external crystal oscillator in the 1–25 MHz range. The LPC1226FBD64/301 achieves a CoreMark score of over 45, equivalent to 1.51 CoreMark/MHz, confirming its deterministic real-time performance.

Does the LPC1226FBD64/301 support in-system programming (ISP)?

Yes, the LPC1226FBD64/301 supports In-System Programming (ISP) via its built-in bootloader, enabling firmware updates through UART0 without requiring external programming hardware. It also supports In-Application Programming (IAP), allowing runtime reprogramming of flash sectors - essential for implementing secure over-the-air (OTA) updates and EEPROM emulation. The LPC1226FBD64/301 bootloader is ROM-resident and activated by asserting a specific pin state during reset.

How many analog-to-digital converter (ADC) channels does the LPC1226FBD64/301 have?

The LPC1226FBD64/301 integrates a single 10-bit successive approximation ADC with eight input channels (AD0–AD7), mapped to pins PIO0_30, PIO0_31, PIO1_0 through PIO1_5. These channels support programmable sample rates and can be triggered by hardware events such as timer match or comparator output, enabling synchronized sensor acquisition. The ADC uses VDD(3V3) as its reference voltage, ensuring stable conversion accuracy across varying load conditions.

What safety certifications apply to the LPC1226FBD64/301's watchdog timer?

The LPC1226FBD64/301 incorporates a Windowed Watchdog Timer (WWDT) certified to IEC-60335 Class B requirements for household and similar electrical appliances. This certification confirms that the WWDT enforces strict upper and lower time-window constraints on refresh intervals, preventing both premature timeout and delayed detection of firmware hangs. The LPC1226FBD64/301 WWDT is fully configurable via registers and supports reset or interrupt-only operation modes.

Can the LPC1226FBD64/301 generate precise baud rates for UART communication?

Yes, the LPC1226FBD64/301 supports fractional baud rate generation in both UART0 and UART1, enabling accurate bit timing across wide clock source variations - including the ±1 % internal RC oscillator. Each UART includes a 16-byte FIFO and hardware flow control signals (RTS/CTS), allowing reliable high-speed serial communication up to 1 Mbit/s. UART0 additionally supports RS-485 direction control and modem handshake lines (DTR/DSR/DCD/RI), making the LPC1226FBD64/301 suitable for industrial fieldbus interfaces.