LPC1785FBD208K - 120MHz Cortex-M3 MCU, 256KB Flash | NXP
Référence : LPC1785FBD208K ✓ ActifLPC1785FBD208K Présentation
An ARM Cortex-M3 microcontroller is a reduced-instruction-set processor core designed for embedded control. It belongs to the MCU and semiconductor hierarchy and combines real-time processing, interrupt handling, memory, and communication peripherals on one device. The Cortex-M3 architecture supports efficient event-driven control while the LPC1785 integration reduces the number of discrete components required for industrial, communications, and data-acquisition equipment.
The principal device features include 120 MHz processing, 256 kB of flash for firmware, and 80 kB of data memory. Peripheral integration includes an eight-channel DMA controller, five UARTs, two CAN channels, three SSP/SPI channels, three I2C channels, I2S, and USB 2.0 Host/OTG/Device connectivity. An eight-channel 12-bit ADC and a 10-bit DAC support mixed-signal designs, while dedicated LCD, SD/MMC, and motor-control interfaces expand the range of suitable equipment.
The LPC1785FBD208K is suited to embedded systems requiring both deterministic control and multiple communication standards. Eight DMA channels can move data between peripherals and SRAM with less processor intervention, while five UARTs support multiple serial links. Dual CAN capability is useful for industrial networking, while USB device, host, and OTG operation supports service interfaces, portable equipment, and peripheral connectivity. The 12-bit ADC can be used with suitable conditioning circuitry for sensors and process-control inputs.
Typical uses include industrial automation controllers, USB-connected test equipment, CAN-based production machinery, data loggers, medical monitoring equipment, HMI systems, and compact motor-control platforms. The large 208-lead LQFP package exposes the broad peripheral set and provides ample I/O for systems that need numerous digital connections, converters, displays, and communication interfaces simultaneously.
Designers should confirm pin multiplexing, peripheral availability, and voltage constraints in the manufacturer pin description table before routing the PCB. Power, ground, decoupling, and high-speed USB signals require careful partitioning. Because this is a large-pin-count MCU, stable power delivery, adequate thermal copper, and disciplined signal-return paths are as important as firmware configuration.
This page consolidates the manufacturer's core specifications, interface requirements, sourcing workflow, and design considerations into one engineering reference. It also identifies the limits of drop-in replacement: firmware, pinout, memory, and peripheral compatibility must be reviewed together rather than treating an MCU substitution as a simple footprint exchange.
Alternatives de remplacement direct pour LPC1785FBD208K — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec LPC1785FBD208K (même facteur de forme et même empreinte) — différant par Architecture, Data Memory, Flash Memory, I2C Interfaces, Package.
LPC1785FBD208
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
LPC1784FBD208K
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
LPC1786FBD208K
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
LPC1787FBD208K
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
LPC1788FBD208K
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →LPC1785FBD208K Valeurs maximales et caractéristiques électriques
| Product Type | 32-bit ARM Cortex-M3 microcontroller |
| Maximum CPU Frequency | 120 MHz |
| Architecture | ARMv7-M Cortex-M3 |
| Flash Memory | 256 kB |
| Data Memory | 80 kB |
| DMA Channels | 8 channels |
| UART Interfaces | 5 channels |
| CAN Interfaces | 2 channels |
| SSP/SPI Interfaces | 3 channels |
| I2C Interfaces | 3 channels |
| ADC Resolution and Channels | 12-bit, 8 channels |
| DAC Resolution | 10-bit |
| USB Capability | USB 2.0 Host, OTG, and Device |
| Boîtier | 208-lead LQFP, 28 mm x 28 mm |
| Terminal Count | 208 terminals |
| Type de montage | Surface mount |
| Temperature Grade | Industrial |
Guide de configuration des broches du LPC1785FBD208K 208-lead lqfp, 28 mm x 28 mm
Configuration des broches du LPC1785FBD208K (boîtier 208-lead lqfp, 28 mm x 28 mm). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour LPC1785FBD208K.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
LPC1785FBD208K convient pour 6 applications: Industrial Automation Controller, USB Data Acquisition System, CAN-Based Production Equipment, Data Logger and Portable Tester, Human-Machine Interface Controller, Medical and Environmental Monitoring.
Industrial Automation Controller
The LPC1785FBD208K fits industrial automation controllers that require real-time Cortex-M3 processing alongside numerous field-bus and sensor connections. Its 120 MHz operating rate supports responsive control logic, while eight DMA channels reduce processor involvement during high-rate data movement. Five UARTs, three SSP/SPI interfaces, three I2C channels, and two CAN channels provide practical connectivity for sensors, actuators, remote I/O, and service interfaces. The 208-lead LQFP exposes substantially more I/O than a compact MCU and is valuable in controllers combining communications, display control, logging, and analog supervision. Firmware should assign functions and DMA resources in a planned matrix, while the PCB must provide clean power distribution and short return paths for every external interface.
Recommandé
USB Data Acquisition System
LPC1785FBD208K is appropriate for a USB data-acquisition system combining USB 2.0 connectivity with multiple analog inputs. The eight-channel 12-bit ADC supports concurrent measurement channels after suitable input conditioning, while eight DMA channels can transfer samples without excessive CPU intervention. USB Device operation provides a direct path to a host computer, while Host or OTG support can broaden peripheral integration. At 120 MHz, the MCU has ample performance for control, filtering, and data formatting. Design attention should center on analog-reference integrity, input protection, USB impedance-controlled routing, and separation between sensitive measurement circuitry and switching or high-current outputs.
Recommandé
CAN-Based Production Equipment
The LPC1785FBD208K supports CAN-based production equipment where deterministic machine coordination and broad peripheral connectivity are required. Two integrated CAN channels allow separate network segments or redundant communication paths, while the 120 MHz Cortex-M3 core executes motion, sequencing, diagnostics, and operator-interface tasks. Five UARTs and three SSP/SPI channels support barcode readers, servos, memory modules, and service ports, while the eight-channel 12-bit ADC can monitor pressure, position, or temperature inputs. The 208-lead package provides the I/O required for isolated transceivers, status indicators, and analog front ends. Each CAN and UART interface should be checked against the manufacturer's pin multiplexing and termination guidance.
Recommandé
Data Logger and Portable Tester
LPC1785FBD208K can serve as the central controller in a data logger or portable field tester that records sensor data and communicates with a host. Its 256 kB flash supports firmware and local resources, while the 80 kB data memory provides working space for acquisition and formatting tasks. USB Device support enables direct computer connection, and the 10-bit DAC can generate test or compensation signals when required. Eight DMA channels help maintain data flow, while the broad set of UART, SPI, I2C, CAN, and I2S interfaces supports mixed sensor fleets. Portable designs must budget regulator efficiency, battery capacity, thermal rise, and ESD protection around the 208-lead LQFP.
Recommandé
Human-Machine Interface Controller
LPC1785FBD208K is well suited to a human-machine interface controller because it combines high-speed control processing with LCD, keypad, storage, and communications resources. The integrated LCD controller can drive a display, while the ADC channels can monitor touch or analog control inputs. USB can provide configuration or maintenance access, and the multiple serial interfaces allow connection to keypads, printers, memory cards, and remote modules. Its 208-lead LQFP offers the pin capacity needed to connect display control, backlight, audio, communications, and expansion logic in one controller. The SD/MMC interface should be routed with appropriate signal integrity, and display and backlight circuitry should be partitioned from sensitive analog measurement nodes.
Recommandé
Medical and Environmental Monitoring
LPC1785FBD208K can support medical or environmental monitoring equipment that combines sensor acquisition, local processing, logging, and communications. The eight-channel 12-bit ADC supports several sensor inputs, while the Cortex-M3 core at 120 MHz can perform filtering, calibration routines, and event handling. USB and CAN or serial interfaces allow the instrument to exchange records with a workstation or central system. The 10-bit DAC can support stimulus generation in lower-precision test functions. For patient-adjacent or regulated equipment, medical qualification, isolation, creepage, leakage, and applicable risk controls must be evaluated separately from the MCU's electrical capabilities. Analog grounding and digital return paths should be planned to prevent sensor noise from entering the measurement path.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LPC1785FBD208K — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LPC1785FBD208 | LPC1784FBD208K | LPC1786FBD208K | LPC1787FBD208K | LPC1788FBD208K |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 208-lead LQFP (28 mm x 28 mm) | 208-lead LQFP (28 mm x 28 mm) | 208-lead LQFP (28 mm x 28 mm) | 208-lead LQFP (28 mm x 28 mm) | 208-lead LQFP (28 mm x 28 mm) | 208-lead LQFP (28 mm x 28 mm) |
| CPU Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 |
| Maximum CPU Frequency | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
Principaux différenciateurs
- Broad peripheral integration in one Cortex-M3 device (vs LPC1784FBD208K)
- Direct USB connectivity with three operating roles (vs LPC1788FBD208K)
- Matched 208-lead footprint across the candidate family (vs LPC1786FBD208K)
Notes de conception
Use the manufacturer recommended decoupling configuration and confirm every supply-domain voltage against the datasheet before assigning the 208 external connections. Keep high-current loads and switching nodes away from the MCU's analog and digital supply routing. A 208-lead LQFP requires uninterrupted plane connections beneath the device; fragmented thermal-via patterns or narrow necks can increase voltage drop and make transient behavior dependent on board layout.
Create the pin-assignment matrix before routing so USB, CAN, UART, SSP/SPI, I2C, LCD, motor-control, ADC, and DAC functions do not conflict on the same multiplexed terminal. Separate analog inputs from switching-control outputs, maintain continuous ground references beneath the MCU, and follow the manufacturer's recommendations for high-speed USB and external memory interfaces. A final PCB review should compare every routed signal against the official pin description table.
Estimated: at 120 MHz, actual power dissipation depends on enabled peripherals, supply voltage, activity, and ambient temperature rather than CPU frequency alone. Use the datasheet operating-mode current values and estimate P = VDD × IDD for the selected mode. Provide adequate exposed-board copper around the LQFP and avoid enclosing it with heat-generating regulators unless thermal coupling has been evaluated.
Do not treat a Cortex-M3 core match as proof of interchangeability. Verify the 208-terminal map, multiplexed functions, flash and SRAM capacity, USB and CAN resources, analog channels, clocking, pin states during reset, and package dimensions. In particular, confirm the industrial-temperature requirement and the final ordering suffix before releasing a replacement order.
Informations de conformité
The device is identified as industrial grade, but no explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals status was present in the cited product information. Automotive qualification is not claimed for this industrial-grade ordering code.
