NXP Semiconductors LPC2148FBD64,151

Overview

LPC2148FBD64,151 from NXP Semiconductors is a 32-bit ARM7TDMI-S microcontroller in LQFP64 package with 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, and 45 fast 5 V-tolerant GPIO lines. It targets embedded communication gateways, industrial control systems, and low-end imaging applications requiring high integration and real-time debug support.

For engineers reviewing the LPC2148FBD64,151 datasheet, LPC2148FBD64,151 pinout, LPC2148FBD64,151 application, or LPC2148FBD64,151 equivalent, key selection criteria include USB DMA-accessible RAM allocation, dual-ADC channel mapping, PWM/Timer resource distribution across P0/P1 ports, and compatibility with EmbeddedICE RT and trace-enabled development tools.

Technical Context

The LPC2148FBD64,151 implements an ARM7TDMI-S core with dual instruction sets (32-bit ARM and 16-bit Thumb), enabling 60 MHz operation via on-chip PLL with 100 µs settling time. Its memory subsystem includes a 128-bit wide interface and accelerator architecture for zero-wait-state execution from flash.

Peripherals are organized via AMBA AHB/APB bridges: USB 2.0 Full-speed controller with 2 kB endpoint RAM and dedicated 8 kB DMA-accessible SRAM; two 32-bit timers with capture/compare/PWM capability; Vectored Interrupt Controller supporting up to 21 external interrupt sources; and dual 10-bit ADCs with conversion times as low as 2.44 µs per channel.

Key Specifications

Pinout & Package

Package: LQFP64 - plastic low profile quad flat package; 64 leads; body 10 × 10 × 1.4 mm (SOT314-2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC2368FBD100 and LPC1769FBD100, the LPC2148FBD64,151 delivers optimal balance of USB integration, analog capability (DAC + dual ADC), compact LQFP64 packaging, and mature ARM7 toolchain support-making it ideal for cost-sensitive, space-constrained USB-peripheral designs without Ethernet or CAN requirements.

Availability

LPC2148FBD64,151 is available at Aetrix Electronics and suitable for industrial control systems, medical monitoring devices, and USB-connected embedded gateways requiring stable component supply and long-term lifecycle assurance.

Supply support for LPC2148FBD64,151 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The LPC214x family was designed for highly integrated, low-power embedded control applications demanding USB connectivity, analog signal processing, and real-time debug visibility-targeting communication gateways, point-of-sale terminals, and portable instrumentation.

FAQ

What is the maximum operating frequency of the LPC2148FBD64,151?

The LPC2148FBD64,151 supports a maximum CPU clock frequency of 60 MHz, achieved via its on-chip programmable PLL with 100 µs settling time. This allows zero-wait-state execution from flash memory thanks to the 128-bit wide interface and accelerator architecture. The oscillator accepts external crystals from 1 MHz to 25 MHz, and the PLL can be configured to multiply the input clock to reach the 60 MHz target. The LPC2148FBD64,151 maintains full functionality-including USB, ADC, and PWM-at this maximum clock rate.

Does the LPC2148FBD64,151 support USB device functionality without external components?

Yes, the LPC2148FBD64,151 integrates a fully compliant USB 2.0 Full-speed device controller with 2 kB of on-chip endpoint RAM and hardware support for SoftConnect via P0.31. Only a single external 1.5 kΩ pull-up resistor on D+ (controlled by P0.31/CONNECT) and basic ESD protection are required for basic enumeration. No external transceiver or PHY is needed. The LPC2148FBD64,151 also provides dedicated 8 kB RAM accessible by both CPU and USB DMA, eliminating host-side buffering overhead. This makes the LPC2148FBD64,151 self-contained for HID, CDC, or custom class implementations.

How many analog input channels does the LPC2148FBD64,151 support, and what is their resolution?

The LPC2148FBD64,151 supports 14 analog input channels across two independent 10-bit successive-approximation ADCs (ADC0 and ADC1). ADC0 provides 8 channels (AD0.0–AD0.7), while ADC1 provides 8 channels (AD1.0–AD1.7), with AD0.0, AD0.5, AD1.6, and AD1.7 not physically bonded out-leaving 14 usable inputs. Each ADC achieves a minimum conversion time of 2.44 µs per channel. The reference voltage is configurable via the VREF pin, and the analog domain is isolated using separate VDDA/VSSA supplies to ensure accuracy. The LPC2148FBD64,151 does not support simultaneous sampling across both ADCs, but they can operate independently with overlapping sequences.

What debug interfaces are available on the LPC2148FBD64,151?

The LPC2148FBD64,151 provides JTAG (TRST, TCK, TMS, TDI, TDO, RTCK) and EmbeddedICE RT interfaces for real-time emulation, plus an Embedded Trace Macrocell (ETM) for instruction-level tracing. These interfaces enable non-intrusive breakpoints, watchpoints, and live memory/register inspection using standard ARM debug tools. The TRACEPKT[3:0], TRACESYNC, and TRACECLK pins support high-speed trace streaming, while PIPESTAT[2:0] signals assist pipeline state analysis. All debug features are accessible in-circuit without halting execution-critical for timing-sensitive applications. The LPC2148FBD64,151 requires no external debug probe beyond standard JTAG adapters compatible with ARM7 cores.

Can the LPC2148FBD64,151 operate from a single 3.3 V supply?

Yes, the LPC2148FBD64,151 operates from a single 3.3 V ±10 % supply (VDD = 3.0 V to 3.6 V) for its digital core and I/Os, while maintaining 5 V tolerance on all GPIO pins. Separate analog supplies-VDDA (3.3 V analog), VSSA (analog ground), and VREF (ADC/DAC reference)-must be provided for precision analog functions. The RTC is powered independently via VBAT (3.3 V), allowing timekeeping during main power loss. This architecture enables robust mixed-signal operation without level shifters, and the built-in Brown-Out Detection (BOD) circuit ensures reliable reset behavior across voltage fluctuations. The LPC2148FBD64,151 is fully functional with properly decoupled 3.3 V rails and isolated analog domains.