NXP Semiconductors LPC4357FET256K

Overview

LPC4357FET256K from NXP Semiconductors is a dual-core ARM Cortex-M4F/M0 microcontroller with 1 MB flash (dual-bank), 136 kB SRAM, 16 kB EEPROM, integrated Ethernet MAC, two high-speed USB 2.0 interfaces (one OTG-capable), LCD controller, and quad SPI Flash Interface (SPIFI) - deployed in industrial motor control, e-metering, and embedded audio systems.

For engineers reviewing the LPC4357FET256K datasheet, LPC4357FET256K pinout, LPC4357FET256K application, or LPC4357FET256K equivalent, this page delivers verified core architecture details, validated LBGA256 package mapping, confirmed peripheral integration (SCTimer/PWM, GIMA, C_CAN), and real-world design constraints including RTC battery backup domain and IEEE 1588 time stamping support.

Technical Context

The LPC4357FET256K implements a tightly coupled dual-processor subsystem: the Cortex-M4F core runs at up to 204 MHz with hardware FPU, MPU, and ETM/ETB trace; the Cortex-M0 coprocessor operates concurrently at up to 204 MHz for peripheral offload, sharing memory via AHB multilayer matrix and synchronized through event router and interrupt controllers.

Its clock system includes three independent PLLs - one for CPU, one for USB, and one for audio - fed by 1–25 MHz crystal or 12 MHz internal RC oscillator (±3 %). Memory subsystem features dual-bank flash with execute-in-place capability via SPIFI, six distinct SRAM blocks (including 32 kB AHB SRAM and 40 kB local SRAM), and ROM-resident boot code with USB stack.

Key Specifications

Pinout & Package

Package: Plastic low-profile ball grid array (LBGA256), 256-ball layout, 17 mm × 17 mm × 1 mm body (SOT740-2), lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC4357JET256, the LPC4357FET256 trades extended temperature tolerance for lower cost in stable ambient conditions; compared with LPC4337FET256, it retains full LCD support and maximum GPIO count - making it the optimal choice for display-integrated industrial HMIs requiring robust dual-core performance.

Availability

LPC4357FET256K is available at Aetrix Electronics and suitable for industrial motor control, e-metering, and embedded audio applications requiring stable component supply, long-term lifecycle assurance, and qualified sourcing for production ramp.

Supply support for LPC4357FET256K 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 deep expertise in ARM-based microcontrollers and edge processing.

The LPC43xx product line was designed for high-performance embedded control applications demanding dual-core determinism, rich analog/digital peripheral integration, and industrial-grade reliability - targeting motor drives, smart meters, and networked HMIs.

FAQ

What is the maximum operating frequency of the LPC4357FET256K?

The LPC4357FET256K supports a maximum CPU frequency of 204 MHz on both the ARM Cortex-M4F and Cortex-M0 cores. This is achieved using the on-chip PLLs driven by either an external 1–25 MHz crystal or the internal 12 MHz RC oscillator. The LPC4357FET256K maintains full peripheral functionality and timing compliance at this frequency, as validated in the official NXP datasheet Rev. 5.4.

Does the LPC4357FET256K include hardware support for IEEE 1588 Precision Time Protocol?

Yes, the LPC4357FET256K integrates IEEE 1588-2008 v2 hardware timestamping within its 10/100T Ethernet MAC. It supports advanced time stamping on both transmit and receive paths with sub-100 ns resolution, enabling deterministic synchronization in industrial Ethernet networks without external timestamping ICs. This capability is documented in Section 2.3.4 of the LPC435x/3x/2x/1x datasheet.

How many independent ADC modules does the LPC4357FET256K feature, and what are their key specifications?

The LPC4357FET256K includes two independent 10-bit ADCs (ADC0 and ADC1), each supporting up to eight input channels and a maximum conversion rate of 400 kSamples/s. Both ADCs support DMA transfers and share multiplexed input pins - for example, ADC0_0 and ADC1_0 are tied together on the same physical pin. This dual-ADC architecture enables simultaneous sampling for applications like motor phase current monitoring and auxiliary sensor acquisition.

What package type and ball count does the LPC4357FET256K use?

The LPC4357FET256K uses a plastic low-profile ball grid array (LBGA256) package with 256 solder balls, 17 mm × 17 mm × 1 mm body dimensions, and SOT740-2 footprint. This package is explicitly listed in Table 1 of the NXP datasheet and confirmed in the pin configuration diagram (Figure 2). It supports fine-pitch PCB assembly and provides full access to all 164 GPIOs and high-speed peripherals.

Is the LCD controller available on the LPC4357FET256K, and what display resolutions does it support?

Yes, the LCD controller is available on the LPC4357FET256K, as confirmed in Table 2 (Ordering Options) of the datasheet. It supports programmable display resolutions up to 1024 H × 768 V, with compatibility for monochrome/color STN and TFT panels. It includes DMA support, 1/2/4/8 bpp CLUT modes, and 16/24-bit direct pixel mapping - making it suitable for industrial HMI displays requiring high-resolution graphics and low-CPU rendering overhead.