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NXP Semiconductors LPC1756FBD80,551
- Part No.:
- LPC1756FBD80,551
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
LPC1756FBD80,551.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,199
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Product details
Overview
LPC1756FBD80,551 from NXP Semiconductors is a 32-bit ARM Cortex-M3 microcontroller operating at up to 100 MHz, featuring 256 kB flash, 32 kB AHB SRAM, 16 kB APB SRAM, dual CAN 2.0B channels, USB 2.0 Host/Device/OTG with on-chip PHY, and 52 GPIO pins in an 80-pin LQFP package. It targets industrial control and motor drive applications requiring real-time I/O, deterministic communication, and mixed-signal integration.
For engineers reviewing the LPC1756FBD80,551 datasheet, LPC1756FBD80,551 pinout, LPC1756FBD80,551 application, or LPC1756FBD80,551 equivalent, this page delivers verified specifications, validated pin functions, confirmed peripheral support (including I2S and DAC on compatible variants), and direct alternative part comparisons for embedded system design and BOM optimization.
Technical Context
The LPC1756FBD80,551 implements the ARM Cortex-M3 core with a 3-stage pipeline, Harvard architecture, and integrated NVIC and MPU supporting eight memory regions. Its AHB multilayer matrix enables concurrent CPU, GPDMA, USB, and peripheral access without arbitration delay.
Peripheral integration includes a 12-bit ADC (6 inputs, 200 kHz max sample rate), 10-bit DAC (dedicated timer and DMA support), four general-purpose timers, motor control PWM, quadrature encoder interface, RTC with battery backup, and dual CAN controllers - all accessible via configurable pin-muxing through the Pin Connect Block.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 100 MHz maximum operation with zero-wait-state flash execution enabled by flash accelerator |
| Memory | 256 kB on-chip flash; 32 kB AHB SRAM + 16 kB APB SRAM = 48 kB total RAM for code/data/DMA buffers |
| Connectivity | Dual CAN 2.0B controllers; USB 2.0 full-speed Host/Device/OTG with integrated PHY and dedicated DMA |
| Analog Peripherals | 12-bit ADC with six input channels and 200 kHz sampling; 10-bit DAC with dedicated conversion timer and DMA support |
| I/O & Timing | 52 GPIO pins with configurable pull-up/down and open-drain mode; four general-purpose timers with capture/compare; RTC with 20-byte battery-backed registers |
| Package | 80-pin LQFP (12 mm × 12 mm × 1.4 mm, SOT315-1), RoHS-compliant, 5 V-tolerant I/O (except USB pins) |
Pinout & Package
Package: 80-pin LQFP (SOT315-1), 12 mm × 12 mm × 1.4 mm body, exposed pad not electrically connected. Compatible with standard reflow profiles per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]/RD1/TXD3/SDA1 | CAN1 RX / UART3 TX / I2C1 data | Multi-function pin supporting CAN bus reception, asynchronous serial transmit, and I2C bidirectional data - selected via Pin Connect Block |
| P0[26]/AD0[3]/AOUT/RXD3 | ADC input / DAC output / UART3 RX | Simultaneous analog input (12-bit), analog output (10-bit), and serial receive capability - DAC function active only when configured as AOUT |
| P0[29]/USB_D+ | USB differential data positive | Full-speed USB 2.0 bidirectional signal; requires 27 Ω series termination and proper PCB impedance control (90 Ω differential) |
| P1[19]/MCOA0/USB_PPWR/CAP1[1] | PWM output / USB port power / timer capture | Motor control PWM channel 0 output A; USB host port power enable; or Timer 1 channel 1 capture input - function selected dynamically in firmware |
| TCK/SWDCLK | JTAG/SWD clock input | Test clock for boundary scan (JTAG) or Serial Wire Debug; supports non-intrusive debugging and trace clock synchronization |
Key Features
| Feature | Design Value |
|---|---|
| ARM Cortex-M3 with MPU | Eight-region memory protection unit enforces secure task isolation and prevents unauthorized memory access in RTOS environments |
| GPDMA controller | Eight-channel AHB-based DMA supports concurrent transfers between peripherals (ADC, DAC, USB, I2S, UARTs) and memory without CPU intervention |
| I2S-bus interface | 3- or 4-wire digital audio interface with fractional rate control and DMA coupling - enables low-latency audio streaming in LPC1756FBD80,551-based systems |
| Low-power operation | Four reduced-power modes (Sleep, Deep-sleep, Power-down, Deep power-down) with wake-up via RTC, CAN, USB, or GPIO interrupts |
| Debug & trace | Serial Wire Debug (SWD) and Serial Wire Trace (SWO) interfaces support real-time instruction tracing and non-intrusive firmware analysis |
Applications
| Industrial Motor Control | Smart Energy Metering |
|---|---|
Use Scenario: Closed-loop three-phase BLDC/PMSM motor drive with position feedback and field-oriented control. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, managing motor PWM outputs (MCOA/MCOB), reading quadrature encoder (PHA/PHB), and sampling current via 12-bit ADC. Use Value: Integrated motor control PWM with dead-time insertion, quadrature encoder interface, and 12-bit ADC enable precise torque/speed regulation without external timing ICs or ADCs. |
Use Scenario: DIN-rail mounted polyphase electricity meter with tariff switching, tamper detection, and HAN communication. IC Role / Device Role / Timing Role: System-on-chip performing metrology calculations, RTC-based billing intervals, CAN/RS-485 backhaul, and secure firmware updates via USB. Use Value: Dual CAN 2.0B channels support utility-side communication; RTC with battery backup ensures accurate time-stamped energy logging during mains failure. |
| Building Automation Gateway | Industrial IoT Edge Node |
Use Scenario: Protocol translator bridging BACnet MS/TP (RS-485) to Ethernet/IP or MQTT over Wi-Fi. IC Role / Device Role / Timing Role: Central protocol engine handling UART-based BACnet framing, CAN-based sensor aggregation, and USB-hosted configuration interface. Use Value: Four UARTs with RS-485 support, dual CAN, and USB Host/Device allow simultaneous legacy fieldbus and modern connectivity - no external bridge IC required. |
Use Scenario: Condition-monitoring node collecting vibration (ADC), temperature (I2C sensor), and CAN bus diagnostics in factory machinery. IC Role / Device Role / Timing Role: Real-time edge processor running predictive maintenance algorithms, buffering sensor data in SRAM, and transmitting alerts via USB or CAN. Use Value: 48 kB total SRAM enables local FFT processing; GPDMA offloads ADC-to-memory transfers; RTC triggers periodic sampling independent of CPU load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC1758FBD80 | 512 kB flash, 64 kB SRAM, integrated Ethernet MAC (RMII), same pinout and peripheral set except Ethernet-specific pins | Suitable where wired LAN connectivity and larger firmware storage are required; Ethernet pins unused in LPC1756FBD80 footprint | Select LPC1758FBD80 if Ethernet is needed; otherwise LPC1756FBD80 offers optimal cost/performance for CAN/USB-only designs |
| LPC1766FBD100 | 100-pin LQFP, 256 kB flash, 64 kB SRAM, adds Ethernet MAC and extra GPIOs; not pin-compatible due to larger package and different pin mapping | Enables higher I/O count and Ethernet while retaining same core/peripheral architecture; requires PCB redesign | Choose LPC1766FBD100 only when additional GPIOs or Ethernet are mandatory and layout revision is acceptable |
Compared with LPC1756FBD80,551, the LPC1758FBD80 provides Ethernet and doubled memory but shares identical pinout and software compatibility, whereas the LPC1766FBD100 expands I/O and memory in a non-pin-compatible 100-pin package - making LPC1756FBD80,551 the most cost-effective choice for CAN/USB-centric industrial control.
Availability
LPC1756FBD80,551 is available at Aetrix Electronics and suitable for industrial motor control, smart metering, building automation gateways, and industrial IoT edge nodes requiring stable component supply, long-term lifecycle assurance, and qualified sourcing.
Supply support for LPC1756FBD80,551 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 leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in ARM-based microcontrollers and embedded security.
The LPC175x family was designed for demanding industrial applications requiring real-time responsiveness, mixed-signal integration, and robust communication - delivering deterministic performance in harsh electrical environments.
FAQ
What is the maximum CPU frequency supported by the LPC1756FBD80,551?
The LPC1756FBD80,551 operates at a maximum CPU frequency of 100 MHz. This is achieved using the on-chip PLL driven by the main oscillator (1–25 MHz crystal) or internal 4 MHz RC oscillator. The flash accelerator enables zero-wait-state execution at this speed, ensuring deterministic real-time performance for time-critical tasks in the LPC1756FBD80,551.
Does the LPC1756FBD80,551 include a DAC, and what are its key characteristics?
Yes, the LPC1756FBD80,551 includes a 10-bit Digital-to-Analog Converter (DAC) with dedicated conversion timer and DMA support. It provides monotonic output, 1 µs settling time, and operates from the same 3.3 V supply as the core. The DAC output appears on P0[26] (AOUT), and its resolution and linearity are specified across the full 0–3.3 V range in the LPC1756FBD80,551 datasheet.
How many CAN interfaces does the LPC1756FBD80,551 support, and are they CAN 2.0A or 2.0B compliant?
The LPC1756FBD80,551 supports two CAN 2.0B-compliant controllers (CAN1 and CAN2), each implementing full CAN 2.0B specification including extended frame support (29-bit identifiers). Both controllers operate independently, share no common registers, and can be used simultaneously for multi-network applications such as diagnostics and control bus separation in the LPC1756FBD80,551.
Is the LPC1756FBD80,551 pin-compatible with other members of the LPC175x family, such as the LPC1758FBD80?
Yes, the LPC1756FBD80,551 is fully pin-compatible with the LPC1758FBD80 and other 80-pin LQFP variants (LPC1759/54/52/51) in the same family. All share identical pin counts, physical dimensions, and signal mapping - enabling drop-in replacement where peripheral requirements align, such as substituting LPC1756FBD80,551 with LPC1758FBD80 for added flash or Ethernet capability.
What debug interfaces are supported by the LPC1756FBD80,551, and is SWD sufficient for full development?
The LPC1756FBD80,551 supports JTAG, Serial Wire Debug (SWD), and Serial Wire Trace (SWO). SWD is fully sufficient for development - providing full read/write memory access, breakpoint setting, register inspection, and real-time trace via SWO. No JTAG header is required; a standard 2-pin SWD interface (SWDIO + SWCLK) enables complete firmware debug and programming for the LPC1756FBD80,551.
LPC1756FBD80,551 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 80-LQFP
- Series:
- LPC17xx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 100MHz
- Connectivity:
- CANbus, I2C, IrDA, Microwire, SPI, SSI, SSP, UART/USART, USB OTG
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, Motor Control PWM, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.4V ~ 3.6V
- Data Converters:
- A/D 6x12b; D/A 1x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LPC1756FBD80,551 FAQ
1.How can I place an order for LPC1756FBD80,551 through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC1756FBD80,551 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LPC1756FBD80,551 reliable?
The price and inventory of LPC1756FBD80,551 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC1756FBD80,551 is usually 5 days.
3.What payment methods are accepted for LPC1756FBD80,551?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC1756FBD80,551 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC1756FBD80,551?
LPC1756FBD80,551 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC1756FBD80,551 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LPC1756FBD80,551?
For technical support, including LPC1756FBD80,551 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC1756FBD80,551 requirements.
6.How does Aetrix verify that LPC1756FBD80,551 is sourced from the original manufacturer or authorized distributors?
All LPC1756FBD80,551 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LPC1756FBD80,551 meets industry standards.
7.What is the process for return or replacement of LPC1756FBD80,551?
All LPC1756FBD80,551 units undergo pre-shipment inspection (PSI). If there is an issue with LPC1756FBD80,551, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LPC1756FBD80,551 part is unused and in its original packaging.
Return procedure for LPC1756FBD80,551:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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