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NXP Semiconductors LPC11U68JBD48E
- Part No.:
- LPC11U68JBD48E
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LPC11U68JBD48E.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LPC11U68JBD48E from NXP Semiconductors is a 32-bit ARM Cortex-M0+ microcontroller in LQFP48 package, operating up to 50 MHz with 256 KB flash, 36 KB SRAM, and 4 KB EEPROM. It integrates USB 2.0 full-speed device controller (with XTAL-less low-speed mode), 12-bit ADC (8 channels, 2 Msamples/s), two I²C interfaces (one Fast-mode Plus), five USARTs, two SSP controllers, and six configurable timers - deployed in GPS trackers and medical monitors requiring compact, low-power embedded control.
For engineers reviewing the LPC11U68JBD48E datasheet, LPC11U68JBD48E pinout, LPC11U68JBD48E application, or LPC11U68JBD48E equivalent, key selection criteria include USB device capability without external crystal, 12-bit ADC performance at 2 Msamples/s, 34 GPIO count in LQFP48, RTC with VBAT backup, and support for Deep power-down wake-up via PIO0_16.
Technical Context
The LPC11U68JBD48E implements an ARM Cortex-M0+ core (r0p1) with two-stage pipeline, single-cycle I/O, and integrated NVIC. Its AHB multilayer matrix enables concurrent peripheral access, while the ROM API provides validated drivers for USB, USART, I²C, DMA, and Flash IAP/ISP.
Peripherals are tightly coupled to the core: the 12-bit ADC supports dual independent conversion sequences with internal/external triggers; the SCTimer/PWM subsystem delivers up to 19 PWM outputs across six independent time bases; and the USB PHY includes on-chip termination and supports suspend/resume with battery-backed RTC domain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0+ (r0p1), 50 MHz max - enables deterministic real-time response with low gate count and energy efficiency. |
| Memory | 256 KB flash (page-erasable), 36 KB SRAM, 4 KB EEPROM - supports field firmware updates and non-volatile parameter storage without external components. |
| ADC | 12-bit, 8-channel, 2 Msamples/s - captures fast transients in sensor monitoring applications such as medical ECG front-ends. |
| USB Interface | Full-speed (12 Mbps) device controller with on-chip PHY and XTAL-less low-speed mode - eliminates external crystal, reducing BOM cost and PCB area. |
| GPIO | 34 pins with programmable pull-up/down, open-drain, glitch filter, and digital filter - simplifies interface to diverse sensors, switches, and legacy peripherals. |
| Power Modes | Sleep, Deep-sleep, Power-down, Deep power-down - achieves sub-μA current in Deep power-down with RTC and VBAT retention for battery-powered GPS trackers. |
| Operating Range | 2.4 V to 3.6 V supply, −40 °C to +105 °C - qualified for industrial and automotive cabin environments without derating. |
Pinout & Package
LQFP48 package (7 × 7 × 1.4 mm, SOT313-2) with 48 leads; lead pitch 0.5 mm; exposed pad not present; RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RTCXOUT | 32 kHz oscillator output - drives external RTC crystal or feeds internal clock generation for battery-backed timekeeping. |
| 3 | RESET/PIO0_0 | Reset input / GPIO - dual-function pin enabling hardware reset initiation or general-purpose I/O; LOW during reset triggers ISP or USB enumeration. |
| 6–7 | PIO2_0/XTALIN, PIO2_1/XTALOUT | Crystal oscillator interface - supports 1–25 MHz external crystal; shared with GPIO when unused, enabling flexible clock source selection. |
| 20–21 | USB_DP, USB_DM | USB 2.0 full-speed differential pair - integrated PHY eliminates need for external transceiver; supports suspend signaling and remote wakeup. |
| 37–38 | SWDIO/PIO0_15, SWCLK/PIO0_10 | Serial Wire Debug interface - enables non-intrusive debug and programming using standard ARM SWD protocol with minimal pin count. |
| 47 | VBAT | Battery backup supply - powers RTC domain independently during main supply loss, preserving time and alarm registers. |
| 48 | RTCXIN | 32 kHz oscillator input - accepts external 32.768 kHz crystal or buffered clock signal for precision real-time operation. |
Key Features
| Feature | Design Value |
|---|---|
| ROM-based USB stack | Pre-certified USB device firmware reduces development time and eliminates host driver dependencies for HID and CDC classes. |
| Configurable SCTimer/PWM | State-configurable timer subsystem delivers up to 19 PWM outputs with independent time bases - ideal for motor control and LED dimming with synchronized phase shifts. |
| DMA with 16 channels | Hardware-accelerated data movement between peripherals and memory without CPU intervention - improves throughput for ADC-to-memory or USART-to-buffer transfers. |
| Temperature sensor | On-die thermal sensor calibrated to ±5 °C accuracy - enables system-level thermal monitoring without external components. |
| Micro Trace Buffer (MTB) | Embedded instruction trace buffer enables non-intrusive code flow analysis and runtime debugging in resource-constrained systems. |
Applications
| GPS Tracker | Medical Monitor |
|---|---|
Use Scenario: Portable asset tracker logging position, speed, and motion events using GNSS and accelerometer inputs. IC Role / Device Role / Timing Role: Central MCU managing GNSS UART interface, USB configuration channel, ADC sampling of battery voltage and temperature, and RTC-timestamped event logging. Use Value: Deep power-down mode with PIO0_16 wake-up and VBAT-backed RTC enables multi-week battery life while maintaining accurate timestamping. | Use Scenario: Wearable vital sign monitor acquiring ECG, SpO₂, and skin temperature with local display and USB data export. IC Role / Device Role / Timing Role: Signal acquisition controller interfacing analog front-end ADC, driving OLED via SPI, and handling USB CDC for PC telemetry streaming. Use Value: 12-bit ADC with 2 Msamples/s and dual conversion sequences allow simultaneous high-fidelity ECG and SpO₂ sampling without timing conflict. |
| Car Radio UI Controller | Three-Phase E-Meter |
Use Scenario: Human-machine interface module for infotainment system, managing touch buttons, rotary encoders, LED indicators, and audio codec I²C control. IC Role / Device Role / Timing Role: Peripheral coordinator handling I²C bus arbitration for multiple codecs and sensors, USART communication with main SoC, and GPIO-driven status LEDs. Use Value: Two I²C interfaces (one Fast-mode Plus) enable concurrent communication with audio DAC and environmental sensor without bus contention. | Use Scenario: Smart electricity meter measuring voltage, current, and power factor across three phases with tamper detection and secure data logging. IC Role / Device Role / Timing Role: Metering co-processor performing ADC oversampling, CRC-verified flash writes, and isolated RS-485 communication via USART with DMA. Use Value: Hardware CRC engine accelerates checksum calculation for secure firmware updates and meter register integrity verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC11U67JBD48 | 128 KB flash, 20 KB SRAM, same peripherals and pinout | Lower memory capacity limits complex USB class implementations or large OTA update images | Select when firmware size remains under 120 KB and EEPROM usage is constrained to <3 KB. |
| LPC11U37FBD48 | No USB PHY; 64 KB flash; lacks ROM USB/I²C/USART drivers | Requires external USB transceiver and custom driver development; no XTAL-less USB mode | Choose only if USB is unnecessary and cost sensitivity outweighs development time for peripheral drivers. |
Compared with LPC11U67JBD48, the LPC11U68JBD48E offers 128 KB additional flash for larger feature sets and secure boot code, while LPC11U37FBD48 requires significant firmware investment to replicate USB and driver functionality absent in its ROM.
Availability
LPC11U68JBD48E is available at Aetrix Electronics and suitable for GPS trackers, medical monitors, car radio UI modules, and three-phase e-meters requiring stable component supply, long-term manufacturability, and industrial temperature support.
Supply support for LPC11U68JBD48E 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 LPC11U6x product line targets cost-sensitive, USB-enabled embedded systems requiring low-power operation, integrated analog peripherals, and robust firmware update capabilities - optimized for portable and battery-operated devices.
FAQ
What USB capabilities does the LPC11U68JBD48E support?
The LPC11U68JBD48E integrates a USB 2.0 full-speed device controller with on-chip PHY, supporting HID, CDC, and MSC classes. It operates in XTAL-less low-speed mode (1.5 Mbps) using the internal 12 MHz IRC, eliminating the need for an external crystal. The ROM includes certified USB stack drivers, enabling rapid implementation without custom firmware development. This makes the LPC11U68JBD48E ideal for plug-and-play USB peripherals where BOM reduction and time-to-market are critical.
Does the LPC11U68JBD48E support deep power-down mode with wake-up capability?
Yes, the LPC11U68JBD48E supports Deep power-down mode with sub-μA quiescent current and retains RTC functionality via the VBAT pin. Wake-up is enabled through PIO0_16, which features a 20 ns glitch filter and responds to a LOW-going pulse as short as 50 ns. External pull-up is required before entering Deep power-down, and the pin must be pulled LOW to initiate wake-up. This capability is essential for battery-powered applications like GPS trackers that require extended operational life between charges.
How many ADC channels and what sample rate does the LPC11U68JBD48E provide?
The LPC11U68JBD48E includes one 12-bit successive-approximation ADC with up to 8 input channels (ADC0_IN0 to ADC0_IN7) and a maximum sample rate of 2 Msamples/s. It supports two independent conversion sequences with flexible trigger sources including timers, software, and external events. This performance allows simultaneous high-resolution sampling of multiple analog signals - such as battery voltage, temperature, and sensor outputs - in real-time medical or industrial monitoring applications using the LPC11U68JBD48E.
Is the LPC11U68JBD48E pin-compatible with other members of the LPC11U6x family?
Yes, the LPC11U68JBD48E is pin-compatible with LPC11U66JBD48 and LPC11U67JBD48 in the LQFP48 package (SOT313-2). All share identical pin assignments, electrical characteristics, and footprint. Firmware developed for one can be reused across the others with only flash/SRAM size adjustments. However, it is not pin-compatible with LQFP64 or LQFP100 variants due to differing pin counts and signal allocations - migration to those packages requires PCB redesign and signal mapping verification for the LPC11U68JBD48E.
What debug interfaces are supported by the LPC11U68JBD48E?
The LPC11U68JBD48E supports Serial Wire Debug (SWD) as the primary debug interface using SWDIO (pin 37) and SWCLK (pin 28), enabling full JTAG-equivalent functionality with only two pins. It also supports boundary scan mode via JTAG (TRST, TDI, TDO, TMS, TCK) for production testing. The Micro Trace Buffer (MTB) is included for instruction trace capture, allowing non-intrusive code flow analysis. These capabilities streamline development and validation of firmware running on the LPC11U68JBD48E without requiring additional debug hardware.
LPC11U68JBD48E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-LQFP
- Series:
- LPC11Uxx
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, Microwire, SPI, SSI, SSP, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 34
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 36K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.4V ~ 3.6V
- Data Converters:
- A/D 8x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LPC11U68JBD48E FAQ
1.How can I place an order for LPC11U68JBD48E through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC11U68JBD48E on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LPC11U68JBD48E reliable?
The price and inventory of LPC11U68JBD48E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC11U68JBD48E is usually 5 days.
3.What payment methods are accepted for LPC11U68JBD48E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC11U68JBD48E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC11U68JBD48E?
LPC11U68JBD48E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC11U68JBD48E order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LPC11U68JBD48E?
For technical support, including LPC11U68JBD48E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC11U68JBD48E requirements.
6.How does Aetrix verify that LPC11U68JBD48E is sourced from the original manufacturer or authorized distributors?
All LPC11U68JBD48E products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LPC11U68JBD48E meets industry standards.
7.What is the process for return or replacement of LPC11U68JBD48E?
All LPC11U68JBD48E units undergo pre-shipment inspection (PSI). If there is an issue with LPC11U68JBD48E, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LPC11U68JBD48E part is unused and in its original packaging.
Return procedure for LPC11U68JBD48E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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