LPC11E68JBD48K - 50MHz Cortex-M0+ 256KB MCU | NXP
MPN: LPC11E68JBD48K ✓ ActiveLPC11E68JBD48K Overview
A microcontroller is a semiconductor device that integrates a CPU core, program memory, data memory, peripherals, and interface controllers on one package. The LPC11E68 belongs to the LPC11Exx family, a low-cost 32-bit MCU platform intended to replace conventional 8-bit and 16-bit designs while providing higher processing performance, efficient code density, and broader peripheral integration.
Key device characteristics include a 50 MHz ARM Cortex-M0+ core, 256 KB of flash for firmware, 36 KB of SRAM for working data, and a 48-LQFP package. The 2.4 V to 3.6 V operating range supports common embedded supply rails, while the compact 7 x 7 mm package supports space-constrained control boards. The LPC11Exx family also targets low-power operation and energy-efficient processing for embedded-control applications.
The LPC11Exx architecture uses the ARM Cortex-M0+ instruction set, which provides deterministic 32-bit processing while maintaining code density appropriate for small embedded systems. Its combination of flash, SRAM, serial interfaces, timers, and GPIO allows one device to consolidate functions that might otherwise require several discrete controllers. The LPC11U68 member of the family adds configurable USB connectivity, making it especially relevant when USB connectivity is required.
Typical uses include industrial control modules, sensor hubs, building automation controllers, compact instrumentation, appliance controls, and connected low-power peripherals. The 256 KB flash capacity accommodates more complex control firmware and protocol stacks than many entry-level 8-bit controllers, while 36 KB of SRAM provides working space for buffering, state management, and communication routines.
Designers should treat the 2.4 V to 3.6 V supply range as the primary electrical boundary and verify every external signal and peripheral setting against the NXP datasheet. PCB layout should provide a stable ground reference, decouple the supply pins near the device, and preserve the package footprint and exposed thermal-pad requirements defined for the selected ordering configuration.
This page combines the LPC11E68JBD48K family positioning, exact-ordering details, interface guidance, engineering trade-offs, and verified sourcing information to support faster component selection and PCB design. It also highlights the LPC11U68JBD48K as the closest USB-equipped family comparison for designs that require that connectivity.
Drop-in alternatives for LPC11E68JBD48K — 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 LPC11E68JBD48K (same form factor and footprint) — differing in Package, Product Type.
LPC11U68JBD48K
✅ Drop-InContact for price
View Datasheet →LPC11E68JBD48
✅ Drop-In📋 Reference alternative (not in catalog)
LPC11E68JBD48K Maximum Ratings & Electrical Characteristics
| Product Type | 32-bit ARM Cortex-M0+ microcontroller |
| Maximum CPU Frequency | 50 MHz |
| Flash Memory | 256 KB |
| Flash Organization | 256K x 8 bits |
| SRAM | 36 KB |
| Core Architecture | ARM Cortex-M0+ |
| Architecture Width | 32 bit |
| Supply Voltage Range | 2.4 V to 3.6 V |
| Package | 48-LQFP (7 x 7 mm) |
| Pin Count | 48 pins |
| Mounting Type | Surface mount |
| Temperature Grade | Industrial |
| Family | LPC11Exx |
| Core Count | Single core |
| Terminal Form | Gull wing |
| Package Shape | Square |
| Package Code | LFQFP |
| RoHS Status | Compliant |
LPC11E68JBD48K lfqfp Pin Configuration Guide
Pin configuration for LPC11E68JBD48K (lfqfp 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 LPC11E68JBD48K.
Refer to the datasheet for full pin configuration.
Typical Applications
LPC11E68JBD48K is suitable for 6 applications: Industrial Control Module, Building Automation Controller, Sensor and Measurement Hub, Appliance Control, Low-Power Connected Peripheral, USB-Capable Data Controller.
Industrial Control Module
The LPC11E68JBD48K fits compact industrial control modules that coordinate sensors, actuators, status indicators, and service interfaces. Its 50 MHz ARM Cortex-M0+ core provides deterministic 32-bit processing, while 256 KB flash accommodates control algorithms, parameter tables, and communication routines. The 36 KB SRAM supports state retention, acquisition buffers, and protocol parsing without forcing the design into a larger memory footprint. Operating from 2.4 V to 3.6 V, the device accommodates standard embedded supply rails, although the final module must account for industrial transients and grounding requirements. Its 48-LQFP 7 x 7 mm package provides a practical pin count for mixed digital and analog control functions while keeping the controller away from the smallest package limit.
Recommended
Building Automation Controller
The LPC11E68JBD48K is appropriate for building-automation nodes that supervise lighting, HVAC interfaces, occupancy sensors, and networked building equipment. Its 256 KB flash provides room for protocol handlers, configuration data, and firmware updates, while the 36 KB SRAM supports message queues and temporary sensor data. The 50 MHz Cortex-M0+ core can manage multiple interrupt-driven peripheral tasks without the overhead of a more complex processor. The 2.4 V to 3.6 V operating range fits controller boards powered from regulated low-voltage rails. Designers should allocate careful PCB partitioning between communications, external relays, and sensor inputs to keep switching transients away from the MCU and maintain a low-impedance ground path.
Recommended
Sensor and Measurement Hub
The LPC11E68JBD48K can serve as the central controller for a compact sensor hub that gathers readings, applies calibration, and forwards status to other equipment. Its 36 KB SRAM is useful for buffering samples and maintaining sensor state, while 256 KB flash can store calibration coefficients and configuration logic. The 50 MHz Cortex-M0+ performance allows interrupt-driven acquisition and serial communication to coexist in a small 7 x 7 mm footprint. The 2.4 V to 3.6 V supply range allows operation from common regulated sources, but analog sensor conditioning and reference components must be designed separately. Keep high-impedance sensor traces away from digital return paths and place supply bypass capacitors at the MCU pins to reduce measurement disturbance.
Recommended
Appliance Control
The LPC11E68JBD48K is well suited to appliance controllers that must coordinate user inputs, displays, motors, heaters, or communication interfaces. The 256 KB flash supports feature-rich firmware and lookup data, and the 36 KB SRAM is sufficient for runtime state, timing, and peripheral buffers. A 50 MHz Cortex-M0+ core offers responsive task scheduling in a compact 48-LQFP package. Its 2.4 V to 3.6 V operating range simplifies use with regulated control rails. In practical products, keep mains-connected or high-energy switching circuits physically separated from the MCU area, provide robust return paths for motor and heater current, and validate the controller across the complete temperature and supply range required by the appliance.
Recommended
Low-Power Connected Peripheral
The LPC11E68JBD48K can support low-power connected peripherals that periodically acquire information and communicate through serial interfaces. Its 36 KB SRAM allows meaningful data buffering during brief wake periods, while 256 KB flash provides nonvolatile storage for firmware and configuration. The Cortex-M0+ core reaches 50 MHz when processing demands are high and can return to a low-power state between tasks. The 2.4 V to 3.6 V range supports common embedded power systems. For battery-operated designs, calculate average current from the actual duty cycle and the datasheet operating modes rather than the maximum clock rate. Stable local bypass capacitance and controlled clock and peripheral states are essential for predictable energy consumption.
Recommended
USB-Capable Data Controller
The LPC11U68JBD48K is the relevant comparison when a control product must include a USB interface rather than relying only on embedded serial links. It retains the 50 MHz Cortex-M0+ core, 256 KB flash, 36 KB SRAM, and 48-LQFP format associated with the LPC11E68JBD48K platform while adding configurable USB connectivity. This combination supports compact adapters, configuration tools, and service interfaces where a dedicated USB controller would otherwise increase board complexity. The same 2.4 V to 3.6 V supply range supports common embedded rails. Firmware, USB clocking, transceiver requirements, and software configuration must be reviewed against the LPC11U family documentation before replacing the non-USB LPC11E68JBD48K.
Recommended
Recommended Products Summary
Engineering reference data for LPC11E68JBD48K — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LPC11U68JBD48K | LPC11E68JBD48 |
|---|---|---|---|
| Package | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| CPU Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum CPU Frequency | 50 MHz | 50 MHz | 50 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB |
| SRAM | 36 KB | 36 KB | 36 KB |
| Supply Voltage Range | 2.4 V to 3.6 V | 2.4 V to 3.6 V | 2.4 V to 3.6 V |
| USB Connectivity | No configurable USB interface | Configurable USB interface | No configurable USB interface |
| Architecture Width | 32 bit | 32 bit | 32 bit |
| Core Count | Single core | Single core | Single core |
Key Differentiators
- Compact 32-bit control with substantial embedded memory (vs LPC11E68JBD48)
- No USB requirement for conventional embedded-control designs (vs LPC11U68JBD48K)
- Low-voltage operation in a compact industrial footprint (vs LPC11U68JBD48K)
Design Notes
Design the supply network for the documented 2.4 V to 3.6 V operating range and place the required bypass capacitors close to the MCU supply pins. Keep the high-current return path away from sensitive analog and communication inputs. If the board also contains relays, motor drivers, or USB circuitry, separate their switching currents from the MCU ground region and confirm the voltage at the pins under the maximum system load.
Use the manufacturer package drawing for the 48-LQFP 7 x 7 mm footprint rather than relying on a generic 48-pin library symbol. Verify pin-1 orientation, pad dimensions, solder-mask clearance, and paste volume during PCB review. Preserve short ground-return paths and arrange decoupling, clock, and debug-access nets to minimize loop area and make programming and boundary-scan access predictable during production.
Do not substitute LPC11U68JBD48K without reviewing the added USB peripheral, clock configuration, and software initialization. Although the core, memory sizes, and package support drop-in consideration, USB changes the electrical and firmware requirements of the product. Similarly, confirm whether the base LPC11E68JBD48 ordering designation has the required packing option before approving it for production procurement.
Size firmware and RAM allocation against the actual 256 KB flash and 36 KB SRAM limits, leaving margin for boot code, configuration data, stack growth, and future updates. Avoid assuming that memory capacity alone guarantees peripheral suitability. Check each required serial interface, timer, GPIO count, analog function, and communication standard against the exact LPC11E68 datasheet before committing the board layout.
Compliance Information
The LPC11E68JBD48K listing identifies RoHS compliance. Other environmental, automotive, lead-free, halogen-free, and conflict-minerals declarations require confirmation from the manufacturer.