NXP Semiconductors LPC1769FBD100K

Overview

LPC1769FBD100K from NXP Semiconductors is a 32-bit ARM Cortex-M3 microcontroller designed for high-integration embedded control applications, operating at up to 120 MHz CPU frequency with 512 kB flash, 64 kB SRAM, and integrated Ethernet MAC, USB 2.0 Host/Device/OTG, dual CAN 2.0B, and 70 GPIO pins. It serves as a system controller in industrial networking gateways requiring real-time protocol handling and deterministic I/O.

For engineers reviewing the LPC1769FBD100K datasheet, LPC1769FBD100K pinout, LPC1769FBD100K application, or LPC1769FBD100K equivalent, key selection criteria include its 120 MHz Cortex-M3 core, dual CAN + Ethernet + USB OTG connectivity, 12-bit ADC with DMA support, and LQFP100 package compatibility with legacy LPC236x designs.

Technical Context

The LPC1769FBD100K implements a Harvard-architecture Cortex-M3 core with 3-stage pipeline, internal prefetch unit, and Memory Protection Unit (MPU) supporting eight memory regions. Its AHB multilayer matrix interconnect enables concurrent access by CPU, GPDMA, Ethernet MAC, and USB controllers without arbitration delay.

Peripheral subsystems include a dedicated 8-channel GPDMA controller servicing UART, SSP, I2S, ADC, DAC, and timers; split APB bus architecture minimizing CPU-DMA stalls; and clock generation with main oscillator (1–25 MHz), 4 MHz ±1% IRC, and dual PLLs (CPU and USB) enabling flexible frequency synthesis without external high-frequency crystals.

Key Specifications

Pinout & Package

LPC1769FBD100K is housed in a plastic low-profile quad flat package (LQFP100) measuring 14 mm × 14 mm × 1.4 mm (SOT407-1), with 100 leads and exposed thermal pad. The package supports standard reflow soldering and provides mechanical robustness for industrial environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1768FBD100, the LPC1769FBD100K delivers 20% higher deterministic throughput for time-critical protocol stacks and integrates DAC for analog actuator control; versus STM32F407VGT6, it offers native Ethernet and dual CAN at lower system-level cost but lacks FPU acceleration for computationally intensive signal processing.

Availability

LPC1769FBD100K is available at Aetrix Electronics and suitable for industrial networking gateways, motor control systems, smart energy meters, and building automation controllers requiring stable component supply across extended product lifecycles.

Supply support for LPC1769FBD100K 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 LPC176x series was engineered as a high-performance, low-power ARM Cortex-M3 migration path from legacy Arm7 microcontrollers, targeting industrial control, motor drives, and protocol gateway applications demanding integrated connectivity and deterministic real-time response.

FAQ

What is the maximum CPU clock frequency supported by the LPC1769FBD100K?

The LPC1769FBD100K operates at a maximum CPU frequency of 120 MHz, enabled by its ARM Cortex-M3 core and enhanced flash accelerator that delivers zero-wait-state execution. This frequency is achieved using the on-chip PLL driven by either the main crystal oscillator (1–25 MHz), internal 4 MHz RC oscillator, or RTC oscillator - eliminating dependency on external high-frequency crystals while maintaining timing precision for real-time industrial protocols.

Does the LPC1769FBD100K include an integrated USB PHY?

Yes, the LPC1769FBD100K integrates a full-speed USB 2.0 PHY supporting Device, Host, and OTG functions. This eliminates the need for external PHY components in USB-enabled designs. Pins P0[27] (USB_SDA), P0[28] (USB_SCL), P0[29] (USB_D+), and P0[30] (USB_D−) form the complete USB interface, with internal termination and ESD protection compliant to USB-IF specifications - simplifying layout and reducing BOM cost for embedded USB applications.

How many CAN interfaces does the LPC1769FBD100K support, and what version of the CAN protocol is implemented?

The LPC1769FBD100K supports two independent CAN 2.0B controllers, each compliant with ISO 11898-1:2003. These controllers provide full CAN protocol handling including identifier masking, message filtering, and automatic retransmission. CAN1 signals map to P0[0]/RD1 and P0[1]/TD1; CAN2 uses P0[4]/RD2 and P0[5]/TD2 - enabling dual-bus industrial networks such as CANopen master/slave topologies or redundant fieldbus communication.

What package type is used for the LPC1769FBD100K, and how does it relate to legacy NXP microcontrollers?

The LPC1769FBD100K uses the LQFP100 package (SOT407-1), a 14 mm × 14 mm × 1.4 mm plastic low-profile quad flat package with 100 leads. It is pin-compatible with the 100-pin LPC236x Arm7-based microcontroller series, allowing direct PCB footprint reuse and minimizing redesign effort when upgrading from legacy industrial controllers to the higher-performance Cortex-M3 architecture.

Does the LPC1769FBD100K include a digital-to-analog converter (DAC), and what are its key specifications?

Yes, the LPC1769FBD100K includes a 10-bit DAC with dedicated conversion timer and DMA support. Its output appears on pin P0[26]/AOUT and features monotonicity, ±1 LSB integral nonlinearity, and 1 MSPS update rate. The DAC is specifically enabled on the LPC1769/68/67/66/65/63 variants per Table 2 - making it suitable for analog actuator control, programmable voltage references, and sensor calibration signal generation in industrial systems.