NXP Semiconductors LPC1820FBD144,551

Overview

LPC1820FBD144 from NXP Semiconductors is a 32-bit ARM Cortex-M3 flashless microcontroller operating at up to 180 MHz, featuring 168 kB on-chip SRAM, dual 10-bit ADCs (400 kSamples/s), and an integrated motor control PWM. It supports Ethernet MAC with IEEE 1588 timestamping, USB 2.0 Host/Device interface (USB0), and external memory controller for NOR flash and SDRAM - deployed in industrial e-metering and white goods control systems.

For engineers reviewing the LPC1820FBD144 datasheet, LPC1820FBD144 pinout, LPC1820FBD144 application, or LPC1820FBD144 equivalent, key selection criteria include its LQFP144 package, absence of LCD/Ethernet/USB1, 83 GPIOs with configurable pull-ups/downs, and support for real-time deterministic control via SCTimer/PWM and QEI.

Technical Context

The LPC1820FBD144 implements an ARM Cortex-M3 r2p1 core with Harvard architecture, 3-stage pipeline, and integrated MPU/NVIC for deterministic real-time execution. Its clock system includes three PLLs - one for CPU (up to 180 MHz), one dedicated to USB0, and one configurable as audio PLL - all fed by a 1–25 MHz crystal or 12 MHz ±1.5% internal RC oscillator.

Digital peripheral routing is managed by the Global Input Multiplexer Array (GIMA), enabling flexible event-driven interconnect between timers, ADCs, and SCTimer/PWM. The device uses AHB-based memory mapping with separate instruction/data buses and supports DMA access across all AHB peripherals including UARTs, SSPs, I2S, and USB0.

Key Specifications

Pinout & Package

Package: LQFP144 (SOT486-1), plastic low-profile quad flat package with 144 leads, body size 20 × 20 × 1.4 mm, lead pitch 0.5 mm, exposed thermal pad optional.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1830FBD144 and LPC4350FBD144, the LPC1820FBD144 offers optimized BOM cost and power efficiency for non-networked embedded control, trading Ethernet and dual-core capability for lower gate count, reduced thermal load, and simplified layout in space-constrained white goods designs.

Availability

LPC1820FBD144 is available at Aetrix Electronics and suitable for industrial motor control, e-metering, and white goods applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LPC1820FBD144 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 specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with over 50 years of embedded systems expertise.

The LPC18xx family was designed for high-performance, flashless real-time control in resource-constrained industrial environments - emphasizing deterministic timing, peripheral flexibility, and robust power management.

FAQ

What is the maximum operating frequency of the LPC1820FBD144?

The LPC1820FBD144 operates at a maximum CPU frequency of 180 MHz using its ARM Cortex-M3 core. This speed is achieved via an internal PLL driven by either an external 1–25 MHz crystal or the 12 MHz ±1.5% internal RC oscillator. The core maintains full performance across its specified voltage range (2.2 V to 3.6 V) and industrial temperature range (−40 °C to +85 °C), as validated in NXP's Rev. 6.8 product data sheet.

Does the LPC1820FBD144 include on-chip Flash memory?

No, the LPC1820FBD144 is a flashless microcontroller. It relies on external storage (e.g., SPI flash via SPIFI or parallel NOR flash via EMC) for program code, while executing from its 168 kB of on-chip SRAM. This architecture enables faster code fetch and eliminates flash wear-out concerns - a key design choice confirmed in the official NXP LPC1850/30/20/10 product data sheet section 1.

How many ADC channels does the LPC1820FBD144 support?

The LPC1820FBD144 integrates two independent 10-bit ADCs (ADC0 and ADC1), each supporting up to eight input channels for a total of eight distinct analog inputs. Both ADCs operate at up to 400 kSamples/s with DMA support, and their channels are multiplexed such that ADC0_0 and ADC1_0 share the same physical pin - a configuration explicitly defined in Table 3 of the NXP datasheet.

Is Ethernet functionality available on the LPC1820FBD144?

No, Ethernet MAC is not implemented in the LPC1820FBD144. Per Table 2 of the NXP datasheet, the LPC1820 variant excludes Ethernet, LCD, and USB1 - distinguishing it from LPC1830/LPC1850. Pins labeled ENET_RXD0, ENET_TXD0, etc., in the LQFP144 pinout are reserved (R) for this part and must not be connected or assumed functional.

What debug interfaces are supported by the LPC1820FBD144?

The LPC1820FBD144 supports JTAG and Serial Wire Debug (SWD) interfaces, along with serial trace, eight hardware breakpoints, and four watchpoints. It also includes Enhanced Trace Module (ETM) and Enhanced Trace Buffer (ETB) support for real-time instruction and data flow analysis - all features documented in Section 2.1 of the NXP LPC1850/30/20/10 product data sheet.