NXP Semiconductors LPC2148FBD64,157

Overview

LPC2148FBD64 from NXP Semiconductors is a 32-bit ARM7TDMI-S microcontroller in LQFP64 package, featuring 512 kB on-chip flash, 32 kB + 8 kB USB-shared SRAM, dual 10-bit ADCs (14 channels total), single 10-bit DAC, USB 2.0 Full-speed device controller with 2 kB endpoint RAM, and 45 fast 5 V-tolerant GPIO pins. It targets embedded communication gateways, protocol converters, and industrial control systems requiring high integration and real-time performance.

For engineers reviewing the LPC2148FBD64 datasheet, LPC2148FBD64 pinout, LPC2148FBD64 application, or LPC2148FBD64 equivalent, key selection considerations include its 60 MHz CPU clock, dual ADC support, USB DMA-accessible RAM allocation, and compatibility with ISP/IAP firmware updates in field-deployed systems.

Technical Context

The LPC2148FBD64 implements the ARM7TDMI-S core with dual instruction sets (32-bit ARM and 16-bit Thumb), enabling code density optimization without sacrificing real-time interrupt latency. Its memory subsystem includes a 128-bit wide interface and accelerator architecture for full-speed 60 MHz execution from flash.

Peripheral integration centers on dual 32-bit timers (each with four capture/compare channels), PWM unit (six outputs), Vectored Interrupt Controller (VIC), two UARTs (16C550 compatible), two Fast I²C-bus interfaces (400 kbit/s), SPI/SSP, and dedicated USB 2.0 Full-speed controller with DMA-capable 8 kB RAM accessible to both USB and CPU.

Key Specifications

Pinout & Package

LPC2148FBD64 uses a plastic low-profile quad flat package (LQFP64) measuring 10 × 10 × 1.4 mm (SOT314-2), with 64 leads and 5 V-tolerant I/O pads supporting TTL levels, hysteresis, and 10 ns slew rate control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC2146FBD64, the LPC2148FBD64 offers 256 kB more flash for larger firmware or embedded filesystems; compared with LPC2368FBD100, it trades Ethernet for integrated USB 2.0 Full-speed capability and smaller footprint-ideal for compact USB-peripheral designs.

Availability

LPC2148FBD64 is available at Aetrix Electronics and suitable for industrial control gateways, USB protocol converters, and medical monitoring devices requiring stable component supply and long-term production continuity.

Supply support for LPC2148FBD64 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 applications.

The LPC214x family was designed as a highly integrated, low-power 32-bit microcontroller platform targeting space-constrained embedded systems requiring USB connectivity, analog signal acquisition, and real-time deterministic control.

FAQ

What is the maximum operating frequency of the LPC2148FBD64?

The LPC2148FBD64 achieves a maximum CPU clock frequency of 60 MHz using its on-chip PLL, which locks to an external crystal (1–25 MHz) with a settling time of 100 µs. This frequency is sustained across the full temperature range (−40 °C to +85 °C) and enables deterministic real-time execution of time-critical tasks such as ADC sampling and USB packet handling in the LPC2148FBD64.

Does the LPC2148FBD64 support in-application programming (IAP)?

Yes, the LPC2148FBD64 supports In-Application Programming (IAP), allowing firmware updates or data writes to flash memory while the application is running. The on-chip boot loader enables erasing of individual sectors or the full chip in 400 ms and programming of 256-byte blocks in 1 ms-critical for field-upgradable medical or industrial devices using the LPC2148FBD64.

How many analog-to-digital converter (ADC) channels does the LPC2148FBD64 provide?

The LPC2148FBD64 integrates two independent 10-bit ADCs (ADC0 and ADC1) supporting a total of 14 analog input channels-six on ADC0 and eight on ADC1-with minimum conversion time of 2.44 µs per channel. This configuration is confirmed in Table 2 of the datasheet and applies specifically to the LPC2148FBD64, distinguishing it from lower variants like LPC2141/42.

Is the DAC output available on the LPC2148FBD64, and where is it located?

Yes, the LPC2148FBD64 includes a single 10-bit DAC with output on pin P0.25 (labeled AOUT). This pin is 5 V tolerant and disables its digital I/O function when configured as DAC output. The DAC is explicitly listed in Table 2 for LPC2142/44/46/48 variants, confirming its presence in the LPC2148FBD64.

What USB capabilities does the LPC2148FBD64 offer?

The LPC2148FBD64 features a USB 2.0 Full-speed device controller compliant with revision 2.0 of the USB specification, including 2 kB of dedicated endpoint RAM and DMA support. An additional 8 kB of SRAM is shared between USB and CPU access-enabling high-throughput data movement without CPU intervention in applications built around the LPC2148FBD64.