NXP Semiconductors LPC1837FET256,551

Overview

LPC1837FET256 from NXP Semiconductors is a 32-bit ARM Cortex-M3 microcontroller operating at up to 180 MHz, featuring 1 MB dual-bank flash, 136 kB SRAM, and integrated Ethernet MAC with IEEE 1588 support. It delivers deterministic real-time control for industrial gateways requiring secure, high-throughput wired connectivity and peripheral flexibility.

For engineers reviewing the LPC1837FET256 datasheet, LPC1837FET256 pinout, LPC1837FET256 application, or LPC1837FET256 equivalent, key selection criteria include its LBGA256 package, absence of LCD controller, dual High-speed USB (one OTG-capable), C_CAN 2.0B support, and 164 GPIOs - all critical for embedded networking and motor-control edge nodes.

Technical Context

The LPC1837FET256 implements an ARM Cortex-M3 r2p1 core with Harvard architecture, 3-stage pipeline, and integrated MPU/NVIC for deterministic interrupt handling and memory protection in safety-aware systems. Its clock system includes three PLLs - one for CPU up to 180 MHz, one dedicated to USB0, and one configurable as audio PLL - enabling independent domain timing without external high-frequency crystals.

Digital subsystems include a State-Configurable Timer/PWM (SCTimer/PWM) with event-driven cross-triggering via GIMA, dual 10-bit ADCs (8 channels total, 400 kSamples/s), and an External Memory Controller supporting SDRAM, NOR flash, and SRAM. It lacks LCD controller hardware but retains full Ethernet MAC (RMII/MII), two High-speed USB interfaces, and SD/MMC interface - distinguishing it from LPC185x variants.

Key Specifications

Pinout & Package

Package: LBGA256 (Plastic low-profile ball grid array; 256 balls; body 17 × 17 × 1 mm; SOT740-2). Pin functions are multiplexed across 16 GPIO ports (P0–P9, PA–PF), with each pin supporting up to eight digital functions including GPIO, Ethernet, USB, SSP, I2S, CAN, and timer I/O.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1857FET256, the LPC1837FET256 removes LCD hardware to reduce cost and power, while retaining full Ethernet, dual USB, and motor-control peripherals; versus LPC1833FET256, it doubles flash capacity to enable robust dual-bank firmware updates without sacrificing performance or I/O.

Availability

LPC1837FET256 is available at Aetrix Electronics and suitable for industrial gateways, RFID readers, e-metering concentrators, and white goods motor control systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LPC1837FET256 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 edge processing.

The LPC18xx product line was designed specifically for high-performance, real-time industrial applications demanding integrated Ethernet, USB, and advanced analog/motor control - positioning LPC1837FET256 as a targeted solution for wired edge intelligence.

FAQ

What is the maximum operating frequency of the LPC1837FET256?

The LPC1837FET256 operates at a maximum CPU frequency of 180 MHz, achieved via its internal PLL system that accepts input from the 1–25 MHz crystal oscillator or 12 MHz internal RC oscillator. This frequency is fully supported across its entire specified temperature range of -40 °C to +85 °C, and the ARM Cortex-M3 core maintains deterministic timing behavior at this rate for real-time task scheduling.

Does the LPC1837FET256 include an LCD controller?

No, the LPC1837FET256 does not include an LCD controller. According to Table 2 in the official datasheet, LCD support is explicitly marked "no" for this variant, distinguishing it from LPC185x family members like LPC1857FET256. This omission reduces silicon area and power consumption, making LPC1837FET256 optimal for applications where display output is handled externally or not required.

How many USB interfaces does the LPC1837FET256 support, and what are their capabilities?

The LPC1837FET256 supports two High-speed USB 2.0 interfaces: USB0 (Host/Device/OTG with on-chip high-speed PHY) and USB1 (Host/Device with on-chip full-speed PHY and ULPI interface for external high-speed PHY). Both include DMA support, enabling zero-copy data transfers. USB0's OTG capability allows dynamic role switching - critical for field-service firmware updates via USB stick or PC connection.

What is the flash memory configuration of the LPC1837FET256?

The LPC1837FET256 integrates 1 MB of on-chip flash memory organized as two independent 512 kB banks (Bank A and Bank B). This dual-bank architecture enables safe over-the-air (OTA) firmware updates by allowing one bank to execute while the other is being reprogrammed - a key requirement for unattended industrial equipment requiring high uptime and fail-safe recovery.

Which Ethernet interface modes are supported by the LPC1837FET256?

The LPC1837FET256 supports both RMII and MII Ethernet physical layer interfaces through its integrated 10/100T MAC. RMII mode uses 4 pins (TXD0/TXD1, TX_EN, RXD0/RXD1, CRS_DV, REF_CLK) for compact PCB layout; MII mode uses 14 pins for legacy PHY compatibility. IEEE 1588-2008 v2 hardware timestamping is available in both modes, enabling precise time synchronization for industrial protocols like PTP.