NXP Semiconductors LPC11E68JBD64K

Overview

LPC11E68JBD64K from NXP Semiconductors is a 32-bit ARM Cortex-M0+ microcontroller operating at up to 50 MHz, featuring 256 KB flash, 36 KB SRAM, 4 KB EEPROM, a 12-bit ADC with 10 input channels, and 50 GPIO pins. It serves as a low-power, cost-optimized main controller in embedded systems requiring mixed-signal processing and multi-protocol connectivity.

For engineers reviewing the LPC11E68JBD64K datasheet, LPC11E68JBD64K pinout, LPC11E68JBD64K application, or LPC11E68JBD64K equivalent, key selection criteria include its LQFP64 package with 50 GPIOs, dual I²C (one Fast-mode Plus), five USARTs (four with shared fractional baud generator), SCTimer/PWM subsystem, and RTC with dedicated VBAT supply - all within a −40 °C to +105 °C industrial temperature range.

Technical Context

The LPC11E68JBD64K implements an ARM Cortex-M0+ core with a two-stage pipeline, single-cycle I/O access, and integrated NVIC for deterministic interrupt handling. Its AHB multilayer matrix enables concurrent peripheral and memory accesses without bus contention.

Peripheral integration includes a configurable SCTimer/PWM engine supporting up to 19 PWM outputs across six independent time bases, a CRC engine for data integrity, and a DMA controller with 16 channels and programmable triggers - enabling efficient offloading of serial interface transfers and ADC sampling sequences.

Key Specifications

Pinout & Package

LQFP64 package with 0.5 mm lead pitch, 10 mm × 10 mm body, and exposed thermal pad (not electrically connected). Pin 1 index located at top-left corner with dot marking; pin numbering follows standard counter-clockwise sequence.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with LPC11E68JBD64K, the LPC11U68JBD64K trades EEPROM for USB capability and extra RAM, while the STM32F072RBT6 offers USB and more ADC channels but omits EEPROM and delivers less memory - making LPC11E68JBD64K optimal for cost-sensitive, EEPROM-dependent industrial control nodes.

Availability

LPC11E68JBD64K is available at Aetrix Electronics and suitable for three-phase e-metering, medical monitoring, GPS tracking, car radio control, and gaming accessory development requiring stable component supply and industrial temperature resilience.

Supply support for LPC11E68JBD64K 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.

The LPC11E6x family targets cost-sensitive, low-power embedded control applications demanding rich analog integration, flexible timer subsystems, and robust serial connectivity - especially where EEPROM persistence and wide temperature operation are essential.

FAQ

What is the maximum operating frequency of the LPC11E68JBD64K?

The LPC11E68JBD64K operates at a maximum CPU frequency of 50 MHz, enabled by its ARM Cortex-M0+ core and internal PLL. This frequency is achievable using the on-chip 12 MHz IRC oscillator (trimmed to ±1 % accuracy) or an external crystal up to 25 MHz, with PLL multiplication. The core maintains single-cycle I/O access even at full speed, ensuring deterministic peripheral response.

Does the LPC11E68JBD64K include on-chip EEPROM, and how is it accessed?

Yes, the LPC11E68JBD64K integrates 4 KB of on-chip EEPROM, accessible via the EEPROM controller peripheral. It supports byte/word read/write and page erase operations, and is managed through ROM API calls for reliable wear leveling and error handling. Unlike flash, EEPROM allows true byte-level writes without erasing larger blocks, making it ideal for storing calibration data, device IDs, or user preferences.

How many ADC input channels does the LPC11E68JBD64K support, and what is its sampling rate?

The LPC11E68JBD64K features a single 12-bit ADC with up to 10 input channels in the LQFP64 package. Its maximum sampling rate is 2 Msamples/s, supported by multiple trigger sources including timers, software, and external events. The ADC supports two independent conversion sequences, enabling simultaneous monitoring of critical analog signals (e.g., voltage and current) with configurable resolution and averaging.

What debug interfaces are supported by the LPC11E68JBD64K?

The LPC11E68JBD64K supports Serial Wire Debug (SWD) as the primary debug interface, with SWDIO and SWCLK on pins 50 and 39 respectively. It also supports JTAG boundary scan via TRST, TDI, TMS, and TDO on pins 46, 42, 43, and 45. SWD is enabled by default; JTAG requires RESET pin assertion at power-on. Both modes support full halt-mode debugging, memory inspection, and flash programming.

Can the LPC11E68JBD64K operate in deep power-down mode, and how is wake-up implemented?

Yes, the LPC11E68JBD64K supports Deep power-down mode with typical current consumption below 1 µA. Wake-up is implemented via the PIO0_16 pin (pin 51), which must be pulled HIGH before entry and driven LOW (≥50 ns pulse) to exit. The pin includes a 20 ns glitch filter and retains wake-up capability even when other peripherals are disabled - enabling ultra-low-power sensor node applications with event-driven responsiveness.