NXP Semiconductors P89LPC932A1FA,112

Overview

P89LPC932A1FA,112 from NXP Semiconductors is an 8-bit accelerated two-clock 80C51 microcontroller in PLCC28 package, delivering six times the instruction throughput of standard 80C51 at 18 MHz (111–222 ns cycle time), with 8 kB byte-erasable flash, 512-byte data EEPROM, and 23 I/O pins. It integrates dual analog comparators, CCU for PWM/capture/compare, RTC-capable 23-bit system timer, and 5 V-tolerant I/O-targeted for cost-sensitive industrial control and sensor interface applications.

For engineers reviewing the P89LPC932A1FA,112 datasheet, P89LPC932A1FA,112 pinout, P89LPC932A1FA,112 application, or P89LPC932A1FA,112 equivalent, key selection considerations include its internal RC oscillator fine-tuning capability, In-Application Programming (IAP) support, 1 µA power-down current, and configurable port output modes (quasi-bidirectional/open-drain/push-pull).

Technical Context

The P89LPC932A1FA,112 implements an enhanced 80C51 core executing instructions in two to four clocks, enabling 18 MHz operation with reduced EMI via controlled slew-rate outputs (~10 ns ramp time). Its architecture embeds a Capture/Compare Unit (CCU) supporting four independent PWM or input capture channels (OCA–OCD, ICA–ICB), plus dual 16-bit timers and a 23-bit system timer usable as RTC.

On-chip peripherals include a fractional-baud-rate UART, 400 kHz I²C bus, SPI interface, and two analog comparators with selectable reference and inputs. The device supports four interrupt priority levels, eight keypad interrupt inputs on Port 0, and programmable port pattern-match detection-enabling responsive human-interface and real-time monitoring without external logic.

Key Specifications

Pinout & Package

Package: PLCC28 (SOT261-2), plastic leaded chip carrier with 28 leads, suitable for through-hole mounting and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with P89LPC932A1FA,112, the P89LPC935FA,112 offers scalable memory while retaining identical peripheral functionality and footprint, whereas the AT89LP51ED2-PU trades integrated analog and timing features for greater program capacity-making it less suitable for sensor interface or ultra-low-power applications.

Availability

P89LPC932A1FA,112 is available at Aetrix Electronics and suitable for industrial control, smart metering, human-machine interface, and low-power IoT edge node applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for P89LPC932A1FA,112 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 focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in microcontrollers and mixed-signal integration.

The P89LPC932A1FA,112 belongs to NXP's LPC900 family of enhanced 80C51 microcontrollers, designed specifically for cost-sensitive, space-constrained embedded systems requiring high integration, low power, and robust in-system programmability.

FAQ

What is the maximum operating frequency of the P89LPC932A1FA,112?

The P89LPC932A1FA,112 operates at a maximum CPU clock frequency of 18 MHz. At this speed, its accelerated two-clock 80C51 core achieves instruction cycle times of 111–222 ns-six times faster than a standard 80C51 running at the same clock rate. This performance enables real-time response in sensor interface and control loops without requiring external accelerators.

Does the P89LPC932A1FA,112 support in-system programming (ISP)?

Yes, the P89LPC932A1FA,112 supports Serial Flash In-System Programming (ISP), allowing firmware updates while the device remains mounted in the target application. This capability uses the on-chip UART and requires no external programming hardware-enabling field upgrades and manufacturing flexibility without removing the P89LPC932A1FA,112 from the PCB.

How many I/O pins does the P89LPC932A1FA,112 provide in PLCC28 package?

The P89LPC932A1FA,112 provides a minimum of 23 I/O pins in the PLCC28 package when using on-chip oscillator and reset options. Up to 26 I/O pins are available depending on configuration-Port 0 (8 pins), Port 1 (8 pins), Port 2 (8 pins), Port 3 (2 pins), plus dedicated function pins like RST and CLKOUT that may be repurposed as GPIO under specific settings.

Can the P89LPC932A1FA,112 operate without an external crystal?

Yes, the P89LPC932A1FA,112 includes a high-accuracy, fine-tunable internal RC oscillator that supports frequencies from 20 kHz to 18 MHz. This eliminates the need for external crystal or resonator components in most applications, reducing BOM cost and board space-while maintaining sufficient timing accuracy for UART communication and real-time control tasks.

What is the power consumption of the P89LPC932A1FA,112 in power-down mode?

The typical power-down current of the P89LPC932A1FA,112 is 1 µA when voltage comparators are disabled. This ultra-low quiescent current enables multi-year battery operation in remote sensors and portable devices. Wake-up is supported via LOW-level interrupt on any configured I/O pin, ensuring rapid resumption of operation without external wake-up circuitry.