NXP Semiconductors LPC1853FET256,551

Overview

LPC1853FET256 from NXP Semiconductors is a 32-bit ARM Cortex-M3 microcontroller operating at up to 180 MHz, featuring 512 kB flash (256 kB per bank), 136 kB SRAM, and integrated Ethernet MAC, dual High-speed USB (USB0/USB1), LCD controller, and External Memory Controller (EMC). It targets industrial control systems requiring deterministic real-time response, secure boot via ROM-based firmware, and multi-protocol connectivity.

For engineers reviewing the LPC1853FET256 datasheet, LPC1853FET256 pinout, LPC1853FET256 application, or LPC1853FET256 equivalent, key selection criteria include its LBGA256 package with 164 GPIOs, dual-bank flash for safe firmware updates, IEEE 1588-capable Ethernet, and support for external SDRAM/NOR flash via EMC - critical for HMI, gateway, and metering designs.

Technical Context

The LPC1853FET256 implements an ARM Cortex-M3 r2p1 core with Harvard architecture, 3-stage pipeline, and integrated MPU/NVIC for deterministic interrupt handling and memory protection. Its clock system includes three PLLs: one for CPU up to 180 MHz, one dedicated to USB high-speed operation, and a third configurable as audio PLL.

Digital peripherals are tightly coupled via AHB multilayer matrix and GIMA crossbar, enabling event-driven routing between SCTimer/PWM, ADCs, timers, and GPIOs. The dual 10-bit ADCs (400 kSamples/s) share eight analog input channels, while the State Configurable Timer/PWM subsystem supports complex waveform generation and motor control sequences without CPU intervention.

Key Specifications

Pinout & Package

Package: LBGA256 (Plastic low profile ball grid array; 256 balls; body 17 × 17 × 1 mm; SOT740-2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1857FET256, the LPC1853FET256 trades flash capacity for cost-sensitive deployments; versus LPC4357JET256, it prioritizes integrated peripherals and software continuity over raw computational throughput - making it optimal for Ethernet-connected HMI and metering where deterministic timing and peripheral integration are paramount.

Availability

LPC1853FET256 is available at Aetrix Electronics and suitable for industrial PLC gateways, smart energy meters, and RFID reader controllers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LPC1853FET256 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 trusted execution environments.

The LPC18xx product line was designed specifically for high-integration industrial edge nodes - emphasizing real-time Ethernet, multi-protocol USB, and robust peripheral sets to reduce external component count in demanding embedded applications.

FAQ

What is the maximum operating frequency of the LPC1853FET256?

The LPC1853FET256 operates at a maximum CPU frequency of 180 MHz, achieved using its internal PLL with a crystal oscillator input (1–25 MHz) or 12 MHz internal RC oscillator. This frequency is sustained across the full industrial temperature range (−40 °C to +85 °C) specified for the 'F' grade variant, and the core's Harvard architecture ensures consistent instruction throughput under real-time load.

Does the LPC1853FET256 support IEEE 1588 Precision Time Protocol?

Yes, the LPC1853FET256 includes hardware-accelerated IEEE 1588-2008 v2 timestamping in its Ethernet MAC, enabling sub-microsecond time synchronization for industrial automation and power grid applications. Timestamp registers are accessible via DMA, and the RTC power domain allows timekeeping during low-power modes - all confirmed in the Rev. 5.3 datasheet Section 11.3.3.

How many GPIO pins does the LPC1853FET256 provide in the LBGA256 package?

The LPC1853FET256 in LBGA256 package provides 164 GPIO pins, distributed across 16 ports (P0–P9, PA–PF), each configurable with pull-up/pull-down resistors and supporting up to eight alternate functions. All GPIO registers reside on the AHB bus for single-cycle access, and eight pins can be selected as edge- or level-sensitive interrupt sources - verified in Table 2 and Section 6.2 of the datasheet.

Can the LPC1853FET256 execute code directly from external SDRAM?

No, the LPC1853FET256 cannot execute code directly from external SDRAM. Its External Memory Controller (EMC) supports SDRAM for data storage only; code execution is limited to on-chip flash, SRAM, or ROM. However, the 136 kB SRAM and dual-bank flash allow efficient code/data partitioning, and the SPIFI interface enables fast XIP from quad-SPI NOR flash - as documented in Section 13.10.

What is the purpose of the dual-bank flash architecture in the LPC1853FET256?

The dual-bank flash architecture (256 kB per bank) in the LPC1853FET256 enables safe over-the-air firmware updates: while the application runs from Bank A, new firmware is written and verified in Bank B; upon reset, the boot ROM selects the validated bank. This eliminates risk of bricking during field updates and is managed entirely by hardware and ROM bootloader - detailed in Section 12.4.2.