NXP Semiconductors LPC2138FBD64/01,11

Overview

LPC2138FBD64/01 from NXP Semiconductors is a 16/32-bit ARM7TDMI-S microcontroller in LQFP64 package, featuring 512 kB flash, 32 kB SRAM, dual 10-bit 8-channel ADCs (16 total analog inputs), single 10-bit DAC, and 47 GPIO with nine external interrupt pins. It operates at up to 60 MHz via on-chip PLL and targets industrial control, medical systems, and communication gateways requiring high analog I/O density and real-time interrupt response.

For engineers reviewing the LPC2138FBD64/01 datasheet, LPC2138FBD64/01 pinout, LPC2138FBD64/01 application, or LPC2138FBD64/01 equivalent, this page delivers verified specifications, validated LQFP64 pin mapping, confirmed dual-ADC/DAC timing roles, and two rigorously cross-referenced alternative microcontrollers for embedded system design and BOM optimization.

Technical Context

The LPC2138FBD64/01 implements an ARM7TDMI-S core with Thumb instruction set support, enabling 32-bit performance at reduced code size-up to 30 % smaller than standard ARM mode with minimal throughput penalty. Its 128-bit wide memory interface and accelerator architecture sustain full 60 MHz operation without wait states.

It integrates two independent 10-bit ADCs (AD0 and AD1) with dedicated result registers to minimize interrupt latency, plus a single 10-bit DAC (AOUT) on P0.25. UART0/1 include hardware fractional baud rate generators and auto-bauding, while Fast GPIO ports reduce pin toggle time by up to 3.5× versus earlier LPC213x variants.

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 LPC2138FBD64/01, LPC2368FBD100 offers more RAM and USB but omits DAC and increases footprint, while LPC1769FBD100 delivers higher throughput and modern peripherals at the cost of ARM7 legacy compatibility and analog output capability.

Availability

LPC2138FBD64/01 is available at Aetrix Electronics and suitable for industrial motor control, medical vital sign monitoring, and access control terminals requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade temperature range (−40 °C to +85 °C).

Supply support for LPC2138FBD64/01 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 delivering secure, scalable solutions for automotive, industrial, IoT, and mobile applications, with deep expertise in ARM-based microcontrollers and mixed-signal integration.

The LPC213x/01 series was designed for cost-sensitive, resource-constrained embedded systems demanding high analog I/O density, real-time responsiveness, and robust debug capabilities-especially where miniaturization and low power are critical.

FAQ

What is the maximum operating frequency of the LPC2138FBD64/01?

The LPC2138FBD64/01 achieves a maximum CPU clock frequency of 60 MHz using its on-chip programmable PLL, which settles in 100 µs. This speed is sustained across the full −40 °C to +85 °C industrial temperature range and enables deterministic real-time execution for time-critical control loops. The 128-bit memory interface eliminates wait states at this clock rate.

Does the LPC2138FBD64/01 include both ADC and DAC functionality?

Yes, the LPC2138FBD64/01 integrates two independent 10-bit 8-channel ADCs (AD0 and AD1), providing up to 16 analog inputs with 2.44 µs conversion time per channel, and one 10-bit DAC (AOUT) on pin P0.25. This combination supports closed-loop analog control, sensor calibration, and waveform generation without external converters.

What package type and pin count does the LPC2138FBD64/01 use?

The LPC2138FBD64/01 uses a plastic low-profile quad flat package (LQFP64) with 64 leads and dimensions of 10 × 10 × 1.4 mm (SOT314-2). All 64 pins are electrically defined in the official datasheet, including 47 GPIO, dual ADC/DAC channels, UARTs, timers, JTAG, and trace interfaces-no unassigned or NC pins.

How does the LPC2138FBD64/01 support real-time debugging and trace?

The LPC2138FBD64/01 includes EmbeddedICE RT and Embedded Trace interfaces, with dedicated trace pins (P1.16–P1.19 for TRACEPKT0–3, P1.20 for TRACESYNC, P1.24 for TRACECLK). These enable non-intrusive instruction-level tracing and real-time breakpoint debugging via tools like Keil ULINK or Segger J-Link, without halting system operation.

What power supply requirements does the LPC2138FBD64/01 have?

The LPC2138FBD64/01 requires a 3.3 V ±10 % supply (VDD = 3.0 V to 3.6 V) for digital logic and I/O, with separate analog supplies: VDDA (3.3 V analog core), VSSA (analog ground), and VREF (ADC/DAC reference). VBAT (3.3 V) powers the RTC independently. All I/O pins are 5 V tolerant, simplifying interface with legacy peripherals.