NXP Semiconductors LPC1774FBD208,551

Overview

LPC1774FBD208,551 from NXP Semiconductors is a 32-bit ARM Cortex-M3 microcontroller designed for embedded control applications requiring high integration, low power, and deterministic real-time response. It operates at up to 120 MHz, integrates 128 kB flash, 40 kB SRAM (32 kB main + 8 kB peripheral), 2048-byte EEPROM, an 8-channel 12-bit ADC, a 10-bit DAC, five UARTs, two CAN channels, three I²C interfaces, three SSP controllers, and 165 GPIO pins in LQFP208 package. It targets industrial motor control and communication gateways.

For engineers reviewing the LPC1774FBD208,551 datasheet, LPC1774FBD208,551 pinout, LPC1774FBD208,551 application, or LPC1774FBD208,551 equivalent, this page delivers verified technical context, validated pin functions, confirmed peripheral configurations, and precise alternative part comparisons - all specific to the LPC1774FBD208,551 variant with no Ethernet, LCD, QEI, or SD/MMC support.

Technical Context

The LPC1774FBD208,551 implements an ARM Cortex-M3 core with 3-stage pipeline, Harvard architecture, and integrated Memory Protection Unit (MPU) supporting eight memory regions. Its multilayer AHB matrix enables concurrent access by CPU, USB, GPDMA, and peripherals without arbitration delay unless contending for the same slave.

It uses a dedicated flash accelerator and local instruction/data buses to sustain 120 MHz execution from on-chip flash. Power management includes Sleep, Deep-sleep, Power-down, and Deep power-down modes, with wake-up via RTC interrupt, PORT0/2 pin events, or NMI - all supported in the LPC1774FBD208,551 configuration.

Key Specifications

Pinout & Package

LQFP208 package: plastic low-profile quad flat package with 208 leads, 28 mm × 28 mm body, 1.4 mm height, and 0.5 mm lead pitch. Pin 1 marked by dot or notch; thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1769FBD100, the LPC1774FBD208,551 offers CAN and USB Device plus 65 more GPIOs in the same footprint family, while LPC1784FBD208 adds Ethernet and LCD - features unused in motor control or field gateway designs where cost and firmware simplicity are prioritized.

Availability

LPC1774FBD208,551 is available at Aetrix Electronics and suitable for industrial motor control, multi-protocol field gateways, and medical diagnostic interfaces requiring stable component supply and long-term production continuity.

Supply support for LPC1774FBD208,551 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The LPC17xx series was engineered for high-integration embedded control, emphasizing real-time performance, mixed-signal capability, and industrial-grade reliability - directly addressing needs in motor drives, protocol bridges, and intelligent sensors.

FAQ

What is the maximum operating frequency of the LPC1774FBD208,551?

The LPC1774FBD208,551 operates at a maximum CPU frequency of 120 MHz, achieved via its on-chip PLL driven by either the internal 12 MHz RC oscillator or an external crystal (1–25 MHz). This frequency is sustained using the integrated flash accelerator and local instruction/data buses, enabling deterministic real-time execution without external RAM.

Does the LPC1774FBD208,551 support Ethernet or LCD interfaces?

No, the LPC1774FBD208,551 does not include Ethernet MAC or LCD controller hardware. Per Table 2 of the official datasheet, these peripherals are disabled in the LPC1774 variant. The LPC1774FBD208,551 retains USB Device, CAN, UARTs, ADC, DAC, and GPIO - making it optimized for control and bridging without networking or display overhead.

How much SRAM is available on the LPC1774FBD208,551, and how is it organized?

The LPC1774FBD208,551 provides 40 kB of total SRAM: 32 kB main SRAM on the CPU local bus for high-speed code/data access, and 8 kB peripheral SRAM accessible via separate AHB paths. This split enables concurrent CPU and DMA operations - for example, the GPDMA can transfer ADC results to peripheral SRAM while the CPU processes prior samples in main SRAM.

Can the LPC1774FBD208,551 be used as a CAN-to-USB gateway?

Yes, the LPC1774FBD208,551 supports CAN-to-USB gateway functionality: its two CAN 2.0B controllers handle fieldbus communication, while its full-speed USB Device controller (with on-chip PHY and DMA) manages PC-side data exchange. Firmware must implement protocol translation, but the hardware resources - including 165 GPIOs for status LEDs and 2048-byte EEPROM for configuration storage - are fully adequate for this role.

What debug interfaces are supported by the LPC1774FBD208,551?

The LPC1774FBD208,551 supports standard JTAG, Serial Wire Debug (SWD), and Serial Wire Trace (SWO) interfaces. It also includes an Embedded Trace Macrocell (ETM) for real-time instruction trace and boundary scan for PCB testability. These capabilities enable full-cycle debugging, profiling, and validation - essential for certifying industrial control firmware.