NXP Semiconductors LPC1857JBD208E

Overview

LPC1857JBD208 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, dual High-speed USB (USB0/USB1), LCD controller, and External Memory Controller (EMC). It targets industrial control systems requiring deterministic real-time response, secure firmware execution, and multi-interface connectivity.

For engineers reviewing the LPC1857JBD208 datasheet, LPC1857JBD208 pinout, LPC1857JBD208 application, or LPC1857JBD208 equivalent, key selection considerations include its LQFP208 package with 142 GPIOs, -40 °C to +105 °C industrial temperature grade, dual USB PHY support (on-chip HS for USB0, ULPI-capable for USB1), IEEE 1588 time stamping, and SCTimer/PWM subsystem for motor control timing precision.

Technical Context

The LPC1857JBD208 implements an ARM Cortex-M3 r2p1 core with Harvard architecture, 3-stage pipeline, and integrated MPU/NVIC for memory protection and nested interrupt handling. It supports speculative branching via an internal prefetch unit and includes ETM/ETB trace modules for real-time debugging.

Its clock system integrates three PLLs: one for CPU operation up to 180 MHz, one dedicated to High-speed USB, and a third configurable as an audio PLL. The device uses separate power domains for RTC (battery-backed) and core logic, enabling ultra-low-power deep-sleep modes with wake-up via GPIO, RTC alarms, or Ethernet events.

Key Specifications

Pinout & Package

LPC1857JBD208 is housed in a Plastic Low Profile Quad Flat Package (LQFP208) measuring 28 mm × 28 mm × 1.4 mm, with 208 leads and 142 GPIO pins accessible across 16 port groups (P0–P9, PA–PF).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1837JBD208, LPC1857JBD208 offers double flash capacity and integrated LCD control for HMI-rich designs; versus LPC4357JBD208, it trades FPU/DSP performance for lower power consumption and simpler software certification in safety-critical industrial contexts.

Availability

LPC1857JBD208 is available at Aetrix Electronics and suitable for industrial PLC controllers, RFID reader systems, e-metering gateways, and white goods control panels requiring stable component supply across extended product lifecycles.

Supply support for LPC1857JBD208 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The LPC18xx product line was designed specifically for high-performance, feature-rich industrial embedded applications demanding robust real-time operation, multi-protocol connectivity, and long-term supply assurance.

FAQ

What is the maximum operating frequency of the LPC1857JBD208?

The LPC1857JBD208 operates at a maximum CPU frequency of 180 MHz, enabled by its ARM Cortex-M3 core with integrated prefetch unit and 3-stage pipeline. This frequency is sustained under full industrial temperature range (-40 °C to +105 °C) and supported by on-chip voltage regulation. The LPC1857JBD208 achieves this performance while maintaining deterministic interrupt latency and low power consumption per MHz.

Does the LPC1857JBD208 support IEEE 1588 Precision Time Protocol?

Yes, the LPC1857JBD208 includes IEEE 1588-2008 v2 time stamping support within its 10/100T Ethernet MAC. Hardware timestamping is applied to both transmit and receive frames at the MAC layer, enabling sub-microsecond synchronization accuracy in industrial Ethernet networks. This capability is fully functional in the LPC1857JBD208's LQFP208 package and requires no external timing ICs.

How many GPIO pins does the LPC1857JBD208 provide?

The LPC1857JBD208 provides 142 GPIO pins, distributed across 16 port groups (P0–P9, PA–PF), each configurable with pull-up/pull-down resistors and programmable drive strength. These pins support multiple alternate functions including UART, I2C, SPI, Ethernet, USB, and timer I/O. All GPIO registers reside on the AHB bus for zero-wait-state access, and eight GPIO pins can be selected as edge- or level-sensitive interrupt sources.

What are the key differences between USB0 and USB1 on the LPC1857JBD208?

USB0 on the LPC1857JBD208 integrates a full High-speed USB 2.0 PHY and supports Host/Device/OTG modes with DMA acceleration. USB1 lacks an on-chip HS PHY but provides ULPI interface for connection to external HS PHYs, and supports only Host/Device modes. Both interfaces include DMA support and ROM-resident USB stack test software, but USB0 enables standalone OTG functionality while USB1 requires external PHY components for HS operation.

Is the LPC1857JBD208 pin-compatible with other LPC18xx variants in LQFP208 package?

Yes, the LPC1857JBD208 is pin-compatible with LPC1853JBD208, LPC1837JBD208, and LPC1833JBD208 in the LQFP208 package. All share identical pin assignments, electrical characteristics, and thermal profiles. Firmware and PCB layouts designed for one can be reused across these variants, differing only in flash size, LCD presence, and peripheral enablement - verified in NXP's official ordering information table and pin description documentation.