NXP Semiconductors P89LPC915FDH,129

Overview

P89LPC915FDH,129 from NXP Semiconductors is a low-pin-count 8-bit microcontroller based on an accelerated two-clock 80C51 core, executing instructions in 2–4 clocks at up to 18 MHz (111–222 ns cycle time). It integrates 2 kB flash code memory with byte-erase capability, 256-byte RAM, dual 16-bit timers, 4-channel 8-bit ADC, dual analog comparators, and enhanced UART - all in a 14-pin TSSOP package for compact embedded control applications including keypad-based industrial interfaces and sensor signal conditioning.

For engineers reviewing the P89LPC915FDH,129 datasheet, P89LPC915FDH,129 pinout, P89LPC915FDH,129 application, or P89LPC915FDH,129 equivalent, this page delivers verified technical context, validated pin functions, confirmed operating parameters (2.4–3.6 V, −40 °C to +85 °C), real-time clock capability, and precise alternative part guidance - all aligned to NXP's Rev. 05 product data sheet.

Technical Context

The P89LPC915FDH,129 implements a high-performance 80C51 derivative CPU with six-times instruction throughput versus standard 80C51 at identical clock frequency, enabled by its two-clock architecture. Its 23-bit system timer supports real-time clock operation, while the 4-input multiplexed 8-bit ADC and two analog comparators (CMP1/CMP2) provide integrated analog front-end functionality without external components.

It features six keypad interrupt inputs (KBI0–KBI5) mapped exclusively to Port 0 pins, programmable port configurations (quasi-bidirectional, open-drain, push-pull), and a factory-calibrated internal RC oscillator (±1 % accuracy) eliminating need for external crystal. The device supports In-Application Programming (IAP-Lite) and includes a dedicated watchdog timer with independent on-chip oscillator and 8-step prescaler.

Key Specifications

Pinout & Package

Package: TSSOP14 (SOT402-1), 14-lead plastic thin shrink small outline package; body width 4.4 mm; lead pitch 0.65 mm; RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with P89LPC915FDH, the P89LPC916FDH trades comparator functionality for SPI connectivity in the same family architecture, while the P89LPC917FDH extends timing and interrupt resources - making each variant optimal for distinct subsystem requirements without architectural redesign.

Availability

P89LPC915FDH,129 is available at Aetrix Electronics and suitable for industrial keypad interfaces, low-power sensor nodes, embedded power supply monitors, and I²C peripheral bridges requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for P89LPC915FDH,129 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in microcontroller innovation and embedded security.

The P89LPC915FDH,129 belongs to NXP's LPC900 family of low-pin-count 8-bit MCUs designed for cost-sensitive, space-constrained embedded control applications requiring integrated analog peripherals, low power, and rapid development cycles.

FAQ

What is the maximum operating frequency of the P89LPC915FDH,129?

The P89LPC915FDH,129 operates at up to 18 MHz clock frequency, delivering instruction cycle times of 111 ns to 222 ns for all instructions except multiply and divide. This performance is six times faster than a standard 80C51 running at the same clock frequency, enabling higher throughput in timing-critical embedded tasks.

Does the P89LPC915FDH,129 support in-system programming?

Yes, the P89LPC915FDH,129 supports Serial Flash In-Circuit Programming (ICP) using commercial EPROM programmers and In-Application Programming (IAP-Lite) for runtime code updates. Flash security bits prevent unauthorized reading of sensitive application firmware stored in the 2 kB flash memory.

How many analog-to-digital converter channels does the P89LPC915FDH,129 have?

The P89LPC915FDH,129 includes a 4-input multiplexed 8-bit ADC with dedicated analog input pins AD10 through AD13 mapped to Port 0 pins P0.1–P0.4. Each channel supports configurable sampling and conversion control via ADCON1 and ADMODA registers.

What is the purpose of the CMPREF pin on the P89LPC915FDH,129?

The CMPREF pin (P0.5) serves as the negative reference input for both analog comparators (CMP1 and CMP2) on the P89LPC915FDH,129. It can be connected to an external voltage source or internal reference to establish threshold levels for comparator decision logic in sensor monitoring or level-detection applications.

Can the P89LPC915FDH,129 operate without an external crystal?

Yes, the P89LPC915FDH,129 includes a factory-calibrated internal RC oscillator accurate to ±1 %, allowing full operation - including UART communication and real-time clock functions - without any external crystal or capacitor components, reducing BOM cost and board space.