NXP Semiconductors LPC11E68JBD48E

Overview

LPC11E68JBD48 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, one 12-bit ADC with 8 input channels, and 36 GPIO pins in an LQFP48 package. It targets embedded control applications requiring integrated analog sensing, multi-protocol serial connectivity, and low-power operation across industrial and consumer systems.

For engineers reviewing the LPC11E68JBD48 datasheet, LPC11E68JBD48 pinout, LPC11E68JBD48 application, or LPC11E68JBD48 equivalent, key selection criteria include its 256 KB flash capacity, 36 KB SRAM allocation, 12-bit ADC sampling rate up to 2 Msamples/s, support for five USARTs (four with shared fractional baud generator), and LQFP48 package compatibility with space-constrained PCB layouts.

Technical Context

The LPC11E68JBD48 implements an ARM Cortex-M0+ core with a two-stage pipeline, single-cycle I/O access, and built-in NVIC for deterministic interrupt handling. Its AHB multilayer matrix enables concurrent peripheral access without bus contention.

Peripheral integration includes a configurable PWM/timer subsystem with two State-Configurable Timers (SCTimer/PWM), a CRC engine, DMA controller with 16 channels, and dual I2C interfaces - one supporting Fast-mode Plus on dedicated open-drain pins - all mapped to the high-speed GPIO interface with programmable glitch filtering.

Key Specifications

Pinout & Package

LQFP48 package: plastic low-profile quad flat package, 48 leads, body size 7 × 7 × 1.4 mm (SOT313-2). Pin 1 index marked by corner notch or dot; thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC11U68JBD48 and LPC1343FBD48, the LPC11E68JBD48 provides unique value in EEPROM-based parameter storage, 256 KB flash for complex firmware, and SCTimer/PWM for precision timing - making it optimal for cost-sensitive, analog-intensive embedded control where USB is unnecessary.

Availability

LPC11E68JBD48 is available at Aetrix Electronics and suitable for medical monitors, GPS trackers, three-phase e-meters, and car radio control systems requiring stable component supply, long-term lifecycle support, and industrial-grade temperature operation.

Supply support for LPC11E68JBD48 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The LPC11E6x product line is designed for cost-sensitive, low-power embedded control applications demanding integrated analog peripherals, flexible serial connectivity, and robust flash/EEPROM memory architecture.

FAQ

What is the maximum operating frequency of the LPC11E68JBD48?

The LPC11E68JBD48 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 main crystal oscillator (1–25 MHz) with PLL multiplication or the internal 12 MHz RC oscillator trimmed to ±1 % accuracy across −25 °C to +85 °C. The LPC11E68JBD48 maintains full peripheral functionality at this speed.

Does the LPC11E68JBD48 include hardware debug support?

Yes, the LPC11E68JBD48 supports Serial Wire Debug (SWD) and JTAG boundary scan modes. SWD uses dedicated SWDIO and SWCLK pins (PIO0_15 and PIO0_10), while JTAG requires TRST, TMS, TDI, and TDO (PIO0_14, PIO0_12, PIO0_11, PIO0_13). Both interfaces enable full-featured debugging, flash programming, and real-time trace via the Micro Trace Buffer (MTB).

How many ADC input channels does the LPC11E68JBD48 support?

The LPC11E68JBD48 integrates one 12-bit ADC supporting up to 8 input channels in the LQFP48 package variant. These channels include ADC_0 through ADC_7, with additional channels (ADC_8–ADC_11) available only on larger LQFP64/LQFP100 packages. The ADC achieves up to 2 Msamples/s with dual independent conversion sequences for simultaneous monitoring tasks.

What power modes are supported by the LPC11E68JBD48?

The LPC11E68JBD48 supports Sleep, Deep-sleep, Power-down, and Deep power-down modes managed by its integrated Power Management Unit (PMU). Wake-up sources include external GPIO pins (e.g., PIO0_16), USART activity, and RTC alarms. In Deep power-down mode, current consumption drops below 1 μA, with wake-up latency under 10 μs when using the dedicated WAKEUP pin.

Is the LPC11E68JBD48 pin-compatible with other LPC11E6x variants?

Yes, the LPC11E68JBD48 is pin-compatible with other LQFP48 variants in the LPC11E6x family - specifically LPC11E66JBD48 and LPC11E67JBD48 - sharing identical pin count, layout, and function mapping. Differences lie in memory size (64/128/256 KB flash) and peripheral enablement, allowing drop-in upgrades within the same package footprint without PCB redesign.