NXP Semiconductors LPC11E37FBD48/501E

Overview

LPC11E37FBD48/501 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller in LQFP48 package, operating at up to 50 MHz with 128 kB flash, 12 kB SRAM, 4 kB EEPROM, 10-bit ADC (8 channels), and 40 GPIO pins. It integrates one USART with RS-485/smart card support, two SSP interfaces, one Fast-mode Plus I²C-bus, four timers, and hardware debug via SWD/JTAG - deployed in industrial control and handheld scanners.

For engineers reviewing the LPC11E37FBD48/501 datasheet, LPC11E37FBD48/501 pinout, LPC11E37FBD48/501 application, or LPC11E37FBD48/501 equivalent, key selection criteria include its 40 GPIO count in LQFP48, absence of I/O Handler (unlike LPC11E37HFBD64/401), 128 kB flash/12 kB SRAM memory partitioning, and full RS-485/ISO 7816-3 USART capability for embedded serial communication systems.

Technical Context

The LPC11E37FBD48/501 implements an ARM Cortex-M0 core with NVIC and NMI support, executing from on-chip flash with ROM-based integer division routines. Its clock system combines a 1–25 MHz crystal oscillator, 12 MHz IRC, and PLL for CPU operation up to 50 MHz, with dedicated low-power WDO for watchdog timing.

Digital peripherals include four general-purpose timers (two 32-bit, two 16-bit) with match/capture capability, programmable WWDT, and GPIO interrupt grouping across 40 pins. Analog functionality centers on an 8-channel, 10-bit ADC with multiplexed inputs, while serial connectivity comprises one USART (with fractional baud rate, FIFO, modem handshake), two SSP controllers, and one I²C-bus supporting Fast-mode Plus (1 Mbit/s).

Key Specifications

Pinout & Package

Package: LQFP48, plastic low-profile quad flat package, 7 mm × 7 mm × 1.4 mm body, 48 leads (SOT313-2). Pin 1 index corner marked; lead finish is matte tin.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC11E36FBD64/501, the LPC11E37FBD48/501 trades 16 GPIO and one capture input for smaller footprint and lower pin-count routing complexity; versus LPC11U37FBD48/501, it omits USB but maintains identical power/performance profile for pure serial-fieldbus applications.

Availability

LPC11E37FBD48/501 is available at Aetrix Electronics and suitable for industrial control, handheld scanners, and medical diagnostic tools requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LPC11E37FBD48/501 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 LPC11E3x product line targets cost-sensitive, low-power embedded applications requiring ARM Cortex-M0 performance with rich analog and serial peripheral integration - optimized for industrial sensing, portable instrumentation, and smart peripherals.

FAQ

What is the maximum operating frequency of the LPC11E37FBD48/501?

The LPC11E37FBD48/501 operates at a maximum CPU frequency of 50 MHz, achieved using either the internal 12 MHz IRC oscillator with PLL multiplication or an external 1–25 MHz crystal oscillator. This frequency is fully supported across the industrial temperature range (−40 °C to +85 °C) and enables real-time execution of control algorithms and protocol stacks without external clock sources.

Does the LPC11E37FBD48/501 include an I/O Handler feature?

No, the LPC11E37FBD48/501 does not include the I/O Handler hardware engine. That feature is exclusive to the LPC11E37HFBD64/401 variant. The LPC11E37FBD48/501 retains full peripheral functionality - including USART, SSP, and I²C - but relies on CPU-driven bit-banging or standard peripheral registers for serial interface emulation, making it suitable for applications where deterministic hardware offload is not required.

How many ADC channels does the LPC11E37FBD48/501 support, and what is their resolution?

The LPC11E37FBD48/501 integrates a single 10-bit successive approximation ADC with eight input channels (AD0 through AD7), accessible via dedicated pins such as PIO0_11, PIO0_12, and PIO0_16. Each channel provides 1024 discrete steps, delivering ~3.3 mV LSB resolution at a 3.3 V reference - sufficient for precision analog sensor interfacing in industrial and medical applications.

What debug interfaces are supported by the LPC11E37FBD48/501?

The LPC11E37FBD48/501 supports both Serial Wire Debug (SWD) and standard JTAG interfaces for development and production programming. SWD uses SWCLK and SWDIO pins (PIO0_10 and PIO0_15), offering minimal pin count and high-speed debugging; JTAG uses TDI, TDO, TMS, TRST, and TCK for boundary scan and full visibility. Both are supported by Keil MDK, LPCXpresso, and openOCD toolchains.

Is the LPC11E37FBD48/501 pin-compatible with other LPC11E3x variants in LQFP48 package?

Yes, the LPC11E37FBD48/501 shares the same LQFP48 pinout (SOT313-2) with other LQFP48 variants like LPC11E35FHI33/501 (HVQFN33) and LPC11E36FHN33/501 (HVQFN33) - but those use different packages. Within LQFP48, it is pin-compatible with LPC11E37FBD48/501's direct siblings (e.g., no functional differences in pin mapping), though memory size and peripheral enablement (e.g., CT32B0_CAP1) may vary per part number.