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NXP Semiconductors LPC1125JBD48/303QL
- Part No.:
- LPC1125JBD48/303QL
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LPC1125JBD48/303QL.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,387
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Product details
Overview
LPC1125JBD48/303QL from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller in LQFP48 package, operating up to 50 MHz with 64 kB flash, 8 kB SRAM, 38 GPIO pins, three RS-485 UARTs, two SSP interfaces, one Fast-mode Plus I²C bus, and a 12-bit 2 Msamples/s ADC - deployed in eMetering, lighting control, and alarm systems.
For engineers reviewing the LPC1125JBD48/303QL datasheet, LPC1125JBD48/303QL pinout, LPC1125JBD48/303QL application, or LPC1125JBD48/303QL equivalent, key selection criteria include its 50 MHz CPU frequency, 38 GPIO with wake-up capability, 12-bit ADC performance, dual SSP support, and low-power Deep-sleep/Deep power-down modes for embedded sensing and industrial control.
Technical Context
The LPC1125JBD48/303QL integrates an ARM Cortex-M0 core with built-in NVIC supporting 32 vectored interrupts and four priority levels, enabling deterministic real-time response in resource-constrained applications. Its clock system combines a 12 MHz ±1 % internal RC oscillator, 1–25 MHz crystal oscillator, and programmable PLL to sustain 50 MHz operation without external high-frequency crystals.
Peripheral architecture uses AHB-Lite for high-speed GPIO and flash access, APB for UART/SSP/I²C/ADC, and dedicated IOCON block for pin multiplexing. All 38 GPIO pins support edge/level-sensitive interrupts and configurable pull-up/pull-down; PIO0_7 provides 20 mA high-current output, while PIO0_4/PIO0_5 support 20 mA sink in I²C Fast-mode Plus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 32-bit RISC, optimized for 8/16-bit replacement with Thumb-2 instruction set and reduced code size. |
| Max Clock Frequency | 50 MHz - achieved via PLL from internal 12 MHz RC oscillator or external crystal, eliminating need for >25 MHz crystals. |
| Memory | 64 kB on-chip flash (256-byte page erase) + 8 kB SRAM - supports In-System Programming (ISP) and In-Application Programming (IAP). |
| ADC | 12-bit successive approximation ADC with 2 Msamples/s throughput and 8-channel input multiplexing - enables high-resolution sensor sampling in metering and motor control. |
| Serial Interfaces | Three UARTs (one with modem control, all with RS-485 support), two SSP controllers (SPI/SSI/Microwire compatible), one I²C-bus (Fast-mode Plus, 1 Mbit/s) - provides flexible fieldbus connectivity. |
| GPIO & Timers | 38 general-purpose I/O pins with interrupt capability; four counter/timers (two 32-bit, two 16-bit) with match/capture functions - suitable for PWM generation, pulse-width measurement, and event timing. |
| Power Management | Integrated PMU with Sleep, Deep-sleep, and Deep power-down modes; wake-up from Deep power-down via dedicated PIO1_4 pin with 20 ns glitch filter - extends battery life in portable devices. |
Pinout & Package
LQFP48 package: plastic low-profile quad flat package, 48 leads, body size 7 × 7 × 1.4 mm (SOT313-2). Pin 1 marked by dot; pins numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET/PIO0_0 | Reset input / GPIO port 0.0 | Active-low external reset; also serves as ISP entry trigger when pulled LOW during reset. |
| XTALIN / XTALOUT | Crytal oscillator inputs | Support 1–25 MHz crystal; internal 12 MHz RC oscillator available as alternative clock source. |
| PIO0_4 / PIO0_5 | I²C0_SCL / I²C0_SDA | Open-drain I²C-bus pins with 20 mA sink capability in Fast-mode Plus - enable robust communication with standard I²C peripherals. |
| PIO1_4/WAKEUP | Wake-up input | Dedicated Deep power-down wake-up pin with 20 ns glitch filter - allows ultra-low-power operation with fast recovery. |
| VDD / VSS / VDDA / VSSA | Power supply rails | Separate analog/digital supplies (VDDA/VSSA) ensure clean ADC reference; single 1.8–3.6 V operation simplifies power design. |
| U0_RXD / U0_TXD | UART0 data I/O | Full-duplex asynchronous serial interface with fractional baud rate generator - supports precise baud rates across wide crystal frequencies. |
| SSP0_SCK / SSP0_MOSI / SSP0_MISO / SSP0_SSEL | SSP0 interface signals | 4-wire synchronous serial interface supporting SPI, SSI, Microwire protocols at up to 25 Mbit/s (master mode) - ideal for flash memory or display drivers. |
| ADC_[1:8] | Analog inputs | Eight 12-bit ADC channels referenced to VREFP/VREFN - support simultaneous sampling of multiple sensors in metering and industrial monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| ARM Cortex-M0 + NVIC | Low-latency interrupt handling with 32 vectored sources and hardware priority masking - critical for deterministic real-time control loops. |
| Accelerated GPIO | GPIO registers mapped to AHB bus for single-cycle read/write; bit-level port control enables atomic multi-bit I/O operations - improves firmware efficiency in LED/motor control. |
| Programmable WDT | Windowed watchdog timer with independent clock source (9.4 kHz–2.3 MHz) - prevents runaway code while allowing safe software updates. |
| ADC Threshold Compare | Hardware-based high/low threshold detection and zero-crossing logic - offloads CPU from polling, enabling event-driven sensor monitoring. |
| Serial Wire Debug | SWDIO/SWCLK pins provide non-intrusive debug interface with minimal pin count - simplifies development and field diagnostics without JTAG overhead. |
Applications
| eMetering | Lighting Control |
|---|---|
Use Scenario: Smart electricity meter with tariff switching, tamper detection, and HAN communication. IC Role / Device Role / Timing Role: Main controller managing metrology calculations, RS-485 PLC/HAN interface, and secure firmware updates. Use Value: 64 kB flash stores dual-metering algorithms and security keys; 12-bit ADC samples current/voltage transformers at 2 Msamples/s for Class 0.5 accuracy. | Use Scenario: DALI-compliant LED driver with dimming profile storage and thermal management. IC Role / Device Role / Timing Role: System-on-chip managing DALI protocol stack, PWM dimming outputs, and ambient light sensing. Use Value: Three UARTs support DALI master/slave and debug interfaces simultaneously; 38 GPIO drive multiple LED strings and sense thermistors. |
| Alarm Systems | White Goods |
Use Scenario: Wireless home security panel with PIR motion detection, siren control, and cloud connectivity. IC Role / Device Role / Timing Role: Central MCU coordinating sensor inputs, audio alerts, and encrypted Wi-Fi module communication. Use Value: Deep power-down mode reduces standby current to µA range; PIO1_4 wake-up pin enables instant response to intrusion events. | Use Scenario: Washing machine main control board managing motor commutation, water level sensing, and user interface. IC Role / Device Role / Timing Role: Real-time motor controller interfacing with Hall sensors, triac drivers, and capacitive touch buttons. Use Value: Four counter/timers generate precise PWM for BLDC motor control; 16-bit timers with capture inputs measure rotor position feedback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC1124JBD48/303 | 32 kB flash (vs. 64 kB), same 8 kB SRAM, identical peripherals and pinout. | Suitable for simpler firmware with smaller code footprint; no change in I/O or timing capabilities. | Select when application firmware fits within 32 kB and cost sensitivity outweighs future scalability needs. |
| STM32F030F4P6 | 32-bit ARM Cortex-M0, 16 kB flash, 4 kB SRAM, 15 GPIO, no RS-485 UART or Fast-mode Plus I²C. | Limited peripheral set - appropriate for basic control tasks without fieldbus or high-channel ADC requirements. | Choose only if design requires minimal BOM cost and can accept reduced I/O count, no RS-485, and no 12-bit ADC. |
Compared with LPC1124JBD48/303, the LPC1125JBD48/303 offers double flash capacity for complex metering firmware and OTA updates; versus STM32F030F4P6, it delivers superior integration with RS-485, Fast-mode Plus I²C, and 38 GPIO - reducing external component count in industrial edge nodes.
Availability
LPC1125JBD48/303QL is available at Aetrix Electronics and suitable for eMetering, lighting control, and alarm systems requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for LPC1125JBD48/303QL 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 deep expertise in ARM-based microcontrollers and mixed-signal integration.
The LPC112x product line was designed specifically for cost-sensitive 8/16-bit MCU replacement in industrial control, smart metering, and appliance applications - emphasizing low power, rich analog/peripheral integration, and seamless ISP/IAP capability.
FAQ
What is the maximum operating frequency of the LPC1125JBD48/303QL?
The LPC1125JBD48/303QL operates at a maximum CPU frequency of 50 MHz. This is achieved using the on-chip PLL, which can be clocked from either the internal 12 MHz ±1 % RC oscillator or an external crystal (1–25 MHz). The PLL eliminates dependency on high-frequency crystals, simplifying board design while maintaining full performance.
Does the LPC1125JBD48/303QL support RS-485 communication?
Yes, the LPC1125JBD48/303QL supports RS-485 communication through all three integrated UARTs. Each UART includes hardware support for RS-485/9-bit mode with automatic address detection and software address detection, enabling reliable multi-drop bus operation in industrial automation and metering networks.
How many analog input channels does the LPC1125JBD48/303QL ADC support?
The LPC1125JBD48/303QL features a 12-bit ADC with eight analog input channels (ADC_[1:8]). It achieves up to 2 Msamples/s conversion rate and includes hardware threshold comparison and zero-crossing detection - making it suitable for precision sensor acquisition in eMetering and motor control applications.
What power-saving modes are available on the LPC1125JBD48/303QL?
The LPC1125JBD48/303QL offers three reduced-power modes: Sleep, Deep-sleep, and Deep power-down. In Deep power-down mode, current consumption drops to µA range, and wake-up is supported via the dedicated PIO1_4 pin with 20 ns glitch filtering - ideal for battery-powered alarm and sensing nodes.
Is the LPC1125JBD48/303QL pin-compatible with other LPC112x variants?
Yes, the LPC1125JBD48/303QL is pin-compatible with other LQFP48-packaged LPC112x devices including LPC1124JBD48/303. All share identical pin assignments, electrical characteristics, and peripheral mapping - enabling hardware reuse across designs with different flash capacities or firmware complexity requirements.
LPC1125JBD48/303QL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-LQFP
- Series:
- LPC1100
- 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
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 38
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 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:
LPC1125JBD48/303QL FAQ
1.How can I place an order for LPC1125JBD48/303QL through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC1125JBD48/303QL 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 LPC1125JBD48/303QL reliable?
The price and inventory of LPC1125JBD48/303QL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC1125JBD48/303QL is usually 5 days.
3.What payment methods are accepted for LPC1125JBD48/303QL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC1125JBD48/303QL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC1125JBD48/303QL?
LPC1125JBD48/303QL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC1125JBD48/303QL 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 LPC1125JBD48/303QL?
For technical support, including LPC1125JBD48/303QL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC1125JBD48/303QL requirements.
6.How does Aetrix verify that LPC1125JBD48/303QL is sourced from the original manufacturer or authorized distributors?
All LPC1125JBD48/303QL 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 LPC1125JBD48/303QL meets industry standards.
7.What is the process for return or replacement of LPC1125JBD48/303QL?
All LPC1125JBD48/303QL units undergo pre-shipment inspection (PSI). If there is an issue with LPC1125JBD48/303QL, 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 LPC1125JBD48/303QL part is unused and in its original packaging.
Return procedure for LPC1125JBD48/303QL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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