LPC1756FBD80K - 100MHz Cortex-M3 MCU, 256KB Flash | NXP
MPN: LPC1756FBD80K ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.68 | $11.68 |
| 10 | $9.14 | $91.40 |
| 100 | $7.81 | $781.00 |
| 500 | $7.24 | $3,620.00 |
| 1,000 | $7.24 | $7,240.00 |
LPC1756FBD80K Overview
A microcontroller is a semiconductor device that executes firmware, reads sensor inputs, controls actuators, and manages communication links in embedded equipment. The LPC1756 belongs to the Cortex-M microcontroller -> embedded processor -> semiconductor hierarchy and is positioned for connected industrial, communications, consumer, and control applications requiring broad peripheral integration and low power consumption.
The verified feature set includes USB Device, Host, and OTG operation; an eight-channel DMA controller; four UARTs; two CAN channels; two SSP peripherals; one SPI peripheral; two I²C interfaces; I²S; an eight-channel 12-bit ADC; a DAC; motor-control PWM; and a quadrature encoder interface. These resources reduce the need for external interface chips while supporting sensor acquisition, communications, data movement, and real-time control.
At 100 MHz, the Cortex-M3 core provides substantially greater processing headroom than many lower-frequency 8-bit or 32-bit control devices. Its architecture supports interrupt-driven firmware and efficient peripheral coordination, while the eight-channel DMA controller can transfer data between memory and serial or analog peripherals with less CPU intervention. The 256 KB flash provides room for application firmware, while 32 KB of SRAM accommodates working data and buffers.
The LPC1756FBD80K is suited to USB-enabled data acquisition, industrial serial gateways, CAN-based control nodes, motor-control systems, audio interfaces, and general embedded control products. Engineers should allocate pins according to the exact LPC1756FBD80 datasheet, validate USB and analog signal integrity, and confirm the required peripheral multiplexing before finalizing PCB routing.
The primary design consideration is not component substitution but firmware and peripheral compatibility. USB firmware, startup code, pin multiplexing, clock settings, and application timing must be validated whenever the package variant or related LPC17xx device changes. The verified distributor and manufacturer pages identify the part as an 80-LQFP, 100 MHz Cortex-M3 MCU with 256 KB flash and 32 KB SRAM.
This page consolidates manufacturer specifications, distributor references, application guidance, and strict data markers where the provided source set does not establish a verified value. The LPC1756FBD80K is best selected when its exact memory size, 100 MHz performance, USB support, and broad Cortex-M3 peripheral set match the product design.
Drop-in alternatives for LPC1756FBD80K — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LPC1756FBD80K (same form factor and footprint) — differing in ADC, DAC, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LPC1756FBD80
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LPC1756FBD80/01
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LPC1756FBD80K/T
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LPC1756FBD80K/EMI
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32F072RBT6TR
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →LPC1756FBD80K Maximum Ratings & Electrical Characteristics
| Product Type | 32-bit ARM Cortex-M3 microcontroller |
| Maximum CPU Frequency | 100 MHz |
| Flash Memory | 256 KB |
| SRAM | 32 KB |
| CPU Core | ARM Cortex-M3 |
| Architecture | 32-bit RISC |
| USB | USB Device, Host, and OTG |
| DMA Controller | 8 channels |
| UART | 4 channels |
| CAN | 2 channels |
| SSP | 2 channels |
| SPI | 1 channel |
| I2C | 2 channels |
| ADC | 8-channel, 12-bit |
| DAC | Integrated DAC |
| Motor-Control PWM | Integrated motor-control PWM |
| Quadrature Encoder | Integrated quadrature encoder interface |
| Package | 80-pin LQFP, 12 x 12 mm |
| Mounting Type | Surface mount |
| Supply Voltage | 2.5 V to 3.3 V |
| Low Power Consumption | Low-power embedded operation |
LPC1756FBD80K 80-pin lqfp, 12 x 12 mm Pin Configuration Guide
Pin configuration for LPC1756FBD80K (80-pin lqfp, 12 x 12 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for LPC1756FBD80K.
Refer to the datasheet for full pin configuration.
Typical Applications
LPC1756FBD80K is suitable for 6 applications: USB Data-Acquisition Gateway, CAN-Based Industrial Control Node, Motor-Control and Encoder Interface, Industrial Serial Gateway, Audio and Digital Interface Control, Embedded Sensor and Measurement System.
USB Data-Acquisition Gateway
The LPC1756FBD80K fits a USB data-acquisition gateway because its 100 MHz Cortex-M3 core can service USB traffic while the eight-channel DMA controller moves samples between memory and the 8-channel, 12-bit ADC. The 256 KB flash provides room for USB stack, control firmware, and configuration logic, while 32 KB SRAM supports buffers and protocol state. Designers should define USB power, connector, clock, and signal-integrity requirements in the schematic and validate peripheral pin multiplexing against the official datasheet.
Recommended
CAN-Based Industrial Control Node
The LPC1756FBD80K is appropriate for a CAN-based industrial control node because it provides two CAN channels, four UARTs, and a 100 MHz Cortex-M3 core in one 80-pin LQFP device. Firmware can use the CAN channels for network messaging, UART channels for local service or sensor links, and PWM plus the quadrature encoder interface for motion-related functions. A production design still needs verified transceiver selection, isolation requirements, termination, surge protection, and validation of industrial EMC conditions.
Recommended
Motor-Control and Encoder Interface
The LPC1756FBD80K supports motor-oriented embedded control with integrated motor-control PWM, a quadrature encoder interface, 12-bit ADC channels, and a 100 MHz processing core. These resources can coordinate current or position feedback, timing functions, and supervisory control without requiring several external logic devices. Power-stage design remains external: use appropriately rated MOSFETs, gate drivers, current sensing, protection, and thermal management, and validate timing behavior at the actual motor and supply conditions.
Recommended
Industrial Serial Gateway
The LPC1756FBD80K can serve as an industrial serial gateway because it combines four UARTs, two SSP channels, one SPI channel, two I²C channels, and USB in a single microcontroller. The 100 MHz Cortex-M3 core can supervise multiple protocol endpoints, while DMA helps transfer data with less processor overhead. Use the exact NXP pin-muxing table to assign external interfaces, isolate exposed serial lines where required, and plan termination and protection for each physical interface.
Recommended
Audio and Digital Interface Control
The LPC1756FBD80K is suitable for audio-interface control because it includes I²S, USB, DMA, multiple serial peripherals, and a 100 MHz Cortex-M3 core. A USB audio or digital signal path can use DMA to move samples efficiently while firmware manages configuration, status, and control messages. The MCU is not itself a high-power audio amplifier, so the application must add suitable codec or amplifier hardware and verify clocking, impedance, grounding, and signal-integrity requirements.
Recommended
Embedded Sensor and Measurement System
The LPC1756FBD80K can coordinate sensors and measurements through its 8-channel, 12-bit ADC, two I²C interfaces, SPI, SSP, UART, and DMA resources. The 32 KB SRAM and 100 MHz core provide space for buffering and active control, while the 256 KB flash supports application firmware and calibration logic. Analog front-end design still requires suitable sensor excitation, filtering, grounding, reference selection, calibration, and protection; the verified sources do not provide ADC accuracy or timing details beyond the stated 12-bit, eight-channel configuration.
Recommended
Recommended Products Summary
Engineering reference data for LPC1756FBD80K — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LPC1756FBD80 | LPC1756FBD80/01 | LPC1756FBD80K/T | LPC1756FBD80K/EMI | STM32F072RBT6TR |
|---|---|---|---|---|---|---|
| Package | 80-pin LQFP, 12 x 12 mm | 80-pin LQFP | 80-pin LQFP | 80-pin LQFP | 80-pin LQFP | 64-pin LQFP |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | STMicroelectronics |
Key Differentiators
- Broad integrated connectivity (vs STM32F072RBT6TR)
- Higher verified CPU frequency for this exact part (vs LPC1756FBD80)
- Memory configuration (vs STM32F072RBT6TR)
Design Notes
Use the official LPC1756FBD80 pinout and package drawing before routing the 80-pin LQFP. The verified data confirms the package but does not provide the complete pin table, so do not infer alternate functions from package position alone. Separate USB differential routing from analog inputs and noisy switching nodes, keep the USB path continuous, and provide the required connector and protection implementation for the selected operating role.
Plan decoupling and power distribution around the verified 2.5 V to 3.3 V supply range shown in the distributor data. Place bulk and local bypass capacitors close to the appropriate supply pins, provide clean return paths, and isolate analog and digital return currents where the board architecture permits. The supplied source set does not establish the complete decoupling-network recommendation, pin-current limits, or startup sequence, so those values must be confirmed in the NXP documentation.
Do not treat every Cortex-M3 MCU as a substitute. Changing from LPC1756FBD80K to another device can alter pin multiplexing, peripheral numbering, interrupt vectors, clock setup, USB behavior, and memory organization. For a true replacement, compare the complete manufacturer pin table, package drawing, electrical limits, peripheral resources, boot configuration, and firmware support; otherwise budget for a PCB or software redesign.
USB, I²S, CAN, and high-speed serial interfaces should be routed against the relevant device documentation and external transceiver requirements. Keep USB impedance and reference-plane continuity controlled, avoid long stubs, place termination where the interface standard requires it, and keep switching-node copper away from ADC and I²S paths. Validate signal behavior with the final stackup, connectors, cables, and firmware timing.
Estimate junction temperature from the actual supply voltage, I/O loading, switching activity, ambient temperature, PCB copper, and package thermal data before production. The supplied sources identify the MCU and package but do not provide verified thermal resistance or maximum power figures. Use the NXP datasheet values for the final thermal design and include worst-case I/O states, not only idle firmware conditions.
Compliance Information
The supplied manufacturer and distributor snippets do not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements for LPC1756FBD80K. Confirm current compliance documents from NXP or the authorized distributor.