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NXP Semiconductors LPC1751FBD80K
- Part No.:
- LPC1751FBD80K
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
LPC1751FBD80K.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:314
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Product details
Overview
LPC1751FBD80K from NXP Semiconductors is a 32-bit ARM Cortex-M3 microcontroller designed for cost-sensitive embedded control applications, operating at up to 100 MHz with 32 kB flash, 8 kB SRAM, single USB Device interface, one CAN 2.0B channel, and 52 GPIO pins in an 80-pin LQFP package - deployed in industrial alarm systems and white goods motor interfaces.
For engineers reviewing the LPC1751FBD80K datasheet, LPC1751FBD80K pinout, LPC1751FBD80K application, or LPC1751FBD80K equivalent, key selection considerations include its USB-only (no Host/OTG) capability, absence of Ethernet/I2S/DAC, single-CAN support, and reduced memory footprint versus higher-tier LPC175x variants.
Technical Context
The LPC1751FBD80K implements the ARM Cortex-M3 core with a 3-stage pipeline, Harvard architecture, and integrated NVIC and MPU supporting eight memory regions. It uses a multilayer AHB matrix interconnect enabling concurrent CPU, DMA, and peripheral access without arbitration delay.
Peripheral subsystems include four UARTs with fractional baud rate generation and DMA support, two I²C-bus interfaces (400 kbit/s fast mode), two SSP controllers, 12-bit ADC (six inputs, 200 kHz max sample rate), RTC with battery backup, and motor control PWM with quadrature encoder interface - all accessible via APB and AHB bridges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 100 MHz max operation - enables deterministic real-time control with low-latency interrupt response. |
| Flash Memory | 32 kB on-chip flash - sufficient for compact firmware images with ISP/IAP support for field updates. |
| SRAM | 8 kB total (AHB SRAM0 only) - optimized for stack, heap, and critical data buffers in resource-constrained designs. |
| USB Interface | USB 2.0 full-speed Device controller only - supports HID, CDC, and MSC class devices without external PHY. |
| CAN Channels | One CAN 2.0B controller - provides robust serial communication for automotive and industrial bus networks. |
| ADC | 12-bit SAR ADC with six input channels and 200 kHz sampling - suitable for sensor monitoring and analog feedback loops. |
| GPIO Pins | 52 general-purpose I/O pins with configurable pull-up/down and open-drain mode - supports flexible signal routing and level-shifting interfaces. |
Pinout & Package
Package: 80-pin LQFP (12 mm × 12 mm × 1.4 mm, SOT315-1), RoHS-compliant, surface-mountable with standard reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TCK/SWDCLK (Pin 5) | JTAG/SWD clock input | Enables debug and programming via industry-standard Serial Wire Debug interface with minimal pin count. |
| P0[0]/RD1/TXD3/SDA1 (Pin 37) | Multiplexed I/O | Configurable as CAN1 receiver, UART3 TX, or I²C1 data - allows shared pin usage across protocols. |
| P0[29]/USB_D+ (Pin 22) | USB differential pair | Full-speed USB 2.0 D+ line with integrated transceiver - eliminates need for external USB PHY. |
| P0[30]/USB_D− (Pin 23) | USB differential pair | Full-speed USB 2.0 D− line with integrated transceiver - requires matched 90 Ω differential impedance routing. |
| RESET (Pin 14) | Asynchronous reset input | 5 V tolerant, 50 ns minimum pulse width - ensures reliable system initialization under noisy conditions. |
Key Features
| Feature | Design Value |
|---|---|
| ARM Cortex-M3 with MPU | Eight-region memory protection unit prevents task interference - essential for certified safety-critical firmware partitions. |
| USB Device controller | Dedicated USB controller with on-chip PHY and DMA - reduces BOM cost and simplifies USB device implementation. |
| Four UARTs with FIFO | Fractional baud rate generator and 16-byte FIFO per UART - supports precise timing over wide baud ranges and burst data handling. |
| Motor control PWM | Six-output PWM block with dead-time insertion and quadrature encoder interface - enables direct BLDC/PMSM motor commutation. |
| Low-power RTC | Separate battery-supplied power domain with 20 bytes of backup registers - maintains timekeeping and state during main power loss. |
Applications
| Alarm Systems | White Goods Control |
|---|---|
Use Scenario: Central monitoring unit in commercial fire/security alarm panels requiring local sensor polling, relay actuation, and USB-based configuration. IC Role / Device Role / Timing Role: Main system controller executing real-time event processing, USB CDC command parsing, and CAN bus communication with zone modules. Use Value: Single-chip integration of USB Device, CAN, and 12-bit ADC eliminates external transceivers and reduces PCB area by >35% versus discrete solutions. | Use Scenario: Main control MCU in washing machines managing motor drive, temperature sensing, user interface, and energy metering. IC Role / Device Role / Timing Role: Real-time motor control executor using PWM outputs and quadrature encoder feedback, plus ADC-based thermistor reading. Use Value: On-chip motor control PWM with dedicated match registers enables precise 3-phase commutation timing without software overhead. |
| Industrial Lighting | eMetering Subsystem |
Use Scenario: Smart LED driver module with DALI/0–10 V dimming interface, thermal monitoring, and USB service port. IC Role / Device Role / Timing Role: System manager handling DALI protocol stack, PWM dimming output, and USB firmware update interface. Use Value: Four UARTs allow simultaneous DALI master, debug console, and auxiliary serial interfaces - no external UART expanders required. | Use Scenario: Data acquisition node in smart electricity meters capturing voltage/current samples and communicating via USB or CAN to concentrator. IC Role / Device Role / Timing Role: High-accuracy ADC sampling engine synchronized to line cycle, with USB bulk transfer of calibrated readings. Use Value: 12-bit ADC with six-channel multiplexer and 200 kHz sampling supports Class 0.5 metering accuracy per IEC 62053-22. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC1752FBD80 | 64 kB flash, 16 kB SRAM, same peripherals except USB Device only and one CAN channel | Supports larger firmware (e.g., with bootloader + application partitioning) and more RAM-intensive tasks like buffered USB transfers | Select when firmware size exceeds 32 kB or additional SRAM is needed for real-time buffering |
| LPC1754FBD80 | 128 kB flash, 32 kB SRAM, adds second CAN channel and USB Host/OTG capability | Enables dual-CAN gateway functions and host-side USB peripheral support (e.g., flash drive reader) | Choose when expanding communication topology beyond single-CAN or requiring USB host functionality |
Compared with LPC1751FBD80K, LPC1752FBD80 offers double flash and SRAM for enhanced firmware scalability, while LPC1754FBD80 adds a second CAN channel and USB Host/OTG - making it suitable for gateway and dual-interface applications where LPC1751FBD80K's USB-Device-only and single-CAN constraints limit expansion.
Availability
LPC1751FBD80K is available at Aetrix Electronics and suitable for industrial alarm systems, white goods motor control, and eMetering subsystems requiring stable component supply and long-term production continuity.
Supply support for LPC1751FBD80K 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 applications, with deep expertise in ARM-based microcontrollers and edge processing.
The LPC175x family targets cost-optimized, low-power embedded control - delivering balanced performance, rich analog/digital peripherals, and USB/CAN connectivity for industrial and consumer equipment.
FAQ
What is the maximum operating frequency of the LPC1751FBD80K?
The LPC1751FBD80K operates at a maximum CPU frequency of 100 MHz, enabled by its ARM Cortex-M3 core and internal PLL. This frequency is supported across the full industrial temperature range (−40 °C to +85 °C) with a 3.3 V ±10 % supply, and requires no external high-frequency crystal due to the integrated PLL's flexibility with internal RC or crystal sources.
Does the LPC1751FBD80K support USB Host or OTG functionality?
No, the LPC1751FBD80K integrates only a USB 2.0 full-speed Device controller with on-chip PHY - it does not support USB Host or OTG modes. This is confirmed in Table 2 of the datasheet, which explicitly lists "Device only" under the USB column for LPC1751FBD80K, distinguishing it from higher variants like LPC1754FBD80K.
How much SRAM is available on the LPC1751FBD80K?
The LPC1751FBD80K provides 8 kB of on-chip SRAM, allocated entirely to AHB SRAM0. Unlike higher variants (e.g., LPC1752FBD80K with 16 kB), it lacks additional SRAM blocks - making it suitable for compact firmware with minimal dynamic memory requirements, such as sensor polling and basic USB device stacks.
Which CAN protocol version does the LPC1751FBD80K support?
The LPC1751FBD80K supports CAN 2.0B, including both standard (11-bit) and extended (29-bit) identifier frames, with programmable bit timing and automatic retransmission. Its single CAN controller meets ISO 11898-1 compliance and is validated for use in industrial fieldbus and automotive subsystem applications.
Is the LPC1751FBD80K pin-compatible with other LPC175x variants in the LQFP80 package?
Yes, all LPC175x devices in the LQFP80 package - including LPC1751FBD80K, LPC1752FBD80K, and LPC1754FBD80K - share identical pinouts and mechanical footprint (SOT315-1). However, peripheral availability (e.g., Ethernet, I2S, DAC, second CAN) varies by variant, so firmware and schematic design must align with the specific part's capabilities.
LPC1751FBD80K 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
- Peripherals:
- Brown-out Detect/Reset, DMA, Motor Control PWM, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.4V ~ 3.6V
- Data Converters:
- A/D 6x12b SAR
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LPC1751FBD80K FAQ
1.How can I place an order for LPC1751FBD80K through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC1751FBD80K 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 LPC1751FBD80K reliable?
The price and inventory of LPC1751FBD80K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC1751FBD80K is usually 5 days.
3.What payment methods are accepted for LPC1751FBD80K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC1751FBD80K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC1751FBD80K?
LPC1751FBD80K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC1751FBD80K 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 LPC1751FBD80K?
For technical support, including LPC1751FBD80K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC1751FBD80K requirements.
6.How does Aetrix verify that LPC1751FBD80K is sourced from the original manufacturer or authorized distributors?
All LPC1751FBD80K 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 LPC1751FBD80K meets industry standards.
7.What is the process for return or replacement of LPC1751FBD80K?
All LPC1751FBD80K units undergo pre-shipment inspection (PSI). If there is an issue with LPC1751FBD80K, 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 LPC1751FBD80K part is unused and in its original packaging.
Return procedure for LPC1751FBD80K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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