NXP Semiconductors LPC11U68JBD64Y

Overview

LPC11U68JBD64Y from NXP Semiconductors is a 32-bit ARM Cortex-M0+ microcontroller operating at up to 50 MHz, featuring 256 KB flash, 36 KB SRAM, and 4 KB EEPROM. It integrates USB 2.0 full-speed device controller with on-chip PHY, dual I²C interfaces (one Fast-mode Plus), five USARTs, two SSP controllers, a 12-bit ADC with 10 channels, and SCTimer/PWM subsystem - deployed in GPS trackers and medical monitors requiring compact, low-power embedded control.

For engineers reviewing the LPC11U68JBD64Y datasheet, LPC11U68JBD64Y pinout, LPC11U68JBD64Y application, or LPC11U68JBD64Y equivalent, key selection criteria include USB device capability without external crystal, 10-channel 12-bit ADC sampling up to 2 Msamples/s, 48 GPIO pins with programmable glitch filtering, and support for deep power-down wake-up via dedicated WAKEUP pin.

Technical Context

The LPC11U68JBD64Y implements an ARM Cortex-M0+ core (r0p1) with single-cycle I/O access and nested vectored interrupt controller (NVIC), paired with an AHB multilayer matrix for efficient peripheral arbitration. Its clock system includes a 12 MHz internal RC oscillator trimmed to ±1 % accuracy, dedicated USB PLL, and programmable watchdog oscillator (9.4 kHz–2.3 MHz).

Peripheral integration centers on hardware-triggered DMA (16 channels), CRC engine, windowed watchdog timer (WWDT), RTC with separate VBAT supply, and a flexible PWM/timer subsystem comprising two 16-bit and two 32-bit standard timers plus two State-Configurable Timers (SCT0/SCT1) supporting up to 19 PWM outputs across six independent time bases.

Key Specifications

Pinout & Package

LPC11U68JBD64Y is housed in a 64-pin LQFP package (10 × 10 × 1.4 mm, SOT314-2) with exposed pad for thermal performance and standard PCB assembly compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC11U67JBD64 and LPC11U37FBD64, the LPC11U68JBD64Y provides 128 KB more flash and 16 KB more SRAM for larger firmware images and runtime buffers, while retaining full USB device functionality and identical peripheral feature depth - making it optimal for next-generation connected devices requiring field-upgradable code and local data storage.

Availability

LPC11U68JBD64Y is available at Aetrix Electronics and suitable for GPS trackers, medical monitors, car radio UI controllers, and three-phase e-meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for LPC11U68JBD64Y 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 over 50 years of innovation in microcontrollers and embedded systems.

The LPC11U6x product line targets cost-sensitive, USB-enabled embedded applications demanding low power, rich analog/peripheral integration, and rapid time-to-market - exemplified by the LPC11U68JBD64Y's balance of memory, USB, and ADC capabilities in LQFP64 form factor.

FAQ

What is the maximum CPU frequency supported by the LPC11U68JBD64Y?

The LPC11U68JBD64Y supports a maximum CPU frequency of 50 MHz using its ARM Cortex-M0+ core. This speed is achievable with either the internal 12 MHz RC oscillator (trimmed to ±1 %) and PLL, or an external crystal up to 25 MHz. The core maintains single-cycle I/O access and deterministic interrupt latency critical for real-time control tasks in the LPC11U68JBD64Y.

Does the LPC11U68JBD64Y include an integrated USB PHY?

Yes, the LPC11U68JBD64Y integrates a full-speed USB 2.0 device controller with on-chip PHY. This eliminates the need for an external transceiver and supports XTAL-less low-speed mode, enabling USB enumeration without an external crystal. The USB interface is fully compliant and accessible via dedicated USB_DP and USB_DM pins on the LQFP64 package of the LPC11U68JBD64Y.

How many ADC input channels does the LPC11U68JBD64Y support, and what is its resolution?

The LPC11U68JBD64Y includes a single 12-bit successive approximation ADC with up to 10 input channels in the LQFP64 package. It supports sample rates up to 2 Msamples/s and offers two independent conversion sequences with multiple trigger sources (timer, software, external). This ADC capability is directly specified for the LPC11U68JBD64Y in NXP's official datasheet Rev. 1.5.

What power modes are available on the LPC11U68JBD64Y, and which supports RTC operation?

The LPC11U68JBD64Y supports Sleep, Deep-sleep, Power-down, and Deep power-down modes. Only Deep power-down mode retains RTC functionality - enabled by the separate VBAT pin (Pin 63) and internal 32 kHz oscillator domain. In this mode, the RTC continues counting with typical current draw below 1 μA, and wake-up is possible via PIO0_16 or external pin interrupts - a confirmed feature of the LPC11U68JBD64Y.

Is the LPC11U68JBD64Y pin-compatible with other members of the LPC11U6x family in LQFP64?

Yes, all LQFP64 variants of the LPC11U6x family - including LPC11U67JBD64 and LPC11U68JBD64Y - share identical pinouts and footprint. This allows direct hardware reuse across memory configurations. However, peripheral availability (e.g., USART3/USART4) and GPIO alternate functions may differ per variant; the LPC11U68JBD64Y specifically supports five USARTs and 48 GPIOs as documented in Table 2 of its datasheet.