NXP Semiconductors P87LPC767FN,112

Overview

P87LPC767FN,112 from NXP Semiconductors (formerly Philips Semiconductors) is a 20-pin, low-power, OTP-based 80C51-compatible microcontroller with integrated 4-kbyte EPROM, 128-byte RAM, four-channel 8-bit A/D converter, dual analog comparators, I²C interface, UART, and programmable on-chip oscillator. It operates from 2.7 V to 6.0 V and supports industrial temperature range (–40 °C to +85 °C) in DIP20 package.

For engineers reviewing the P87LPC767FN,112 datasheet, P87LPC767FN,112 pinout, P87LPC767FN,112 application, or P87LPC767FN,112 equivalent, key selection considerations include its 8-bit ADC timing (9.3 µs at 20 MHz), watchdog timer with independent RC oscillator, configurable port output modes (quasi-bidirectional/open-drain/push-pull), LED drive capability (20 mA), and support for keypad interrupt on all Port 0 pins.

Technical Context

The P87LPC767FN,112 implements an accelerated 80C51 core executing instructions in 300–600 ns at 20 MHz (VDD ≥ 4.5 V), with dual 16-bit timers, full-duplex UART, and I²C master/slave capability. Its analog subsystem includes two independent comparators with selectable reference and four multiplexed ADC inputs sharing Port 0 pins.

Power management features include Idle and Power Down modes with typical 1 µA current in Power Down, brownout detection with selectable threshold, and on-chip power-on reset-enabling operation with only VDD and VSS when internal oscillator and reset are enabled.

Key Specifications

Pinout & Package

Package: DIP20 (SOT146-1), 300-mil plastic dual in-line package with 0.3-inch width and standard through-hole footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT89LP2052-20PU and PIC16F684-I/P, the P87LPC767FN,112 uniquely integrates 8-bit ADC, dual comparators, I²C, UART, and programmable oscillator in a 20-pin DIP-reducing component count and PCB area for cost-sensitive industrial controls where analog sensing and serial connectivity coexist.

Availability

P87LPC767FN,112 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, embedded HVAC controllers, and low-cost industrial HMIs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for P87LPC767FN,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 company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The P87LPC767FN,112 belongs to NXP's legacy LPC700 family of low-pin-count 80C51 microcontrollers, designed specifically for cost-optimized, space-constrained embedded systems requiring integrated analog peripherals and robust industrial-grade operation.

FAQ

What is the maximum operating frequency of the P87LPC767FN,112?

The P87LPC767FN,112 executes at up to 20 MHz when VDD is 4.5 V to 6.0 V, and up to 10 MHz when VDD is 2.7 V to 6.0 V. Its accelerated 80C51 core achieves instruction cycle times of 300–600 ns for most instructions at 20 MHz, enabling responsive real-time control in compact systems without external clock multiplication.

Does the P87LPC767FN,112 support in-system programming?

No, the P87LPC767FN,112 uses one-time-programmable (OTP) EPROM and does not support in-system or in-circuit reprogramming. Programming occurs during manufacturing using parallel EPROM programmers. However, serial EPROM programming is supported for production coding, and two EPROM security bits prevent unauthorized readout of the application code stored in the P87LPC767FN,112.

How many analog input channels does the P87LPC767FN,112 ADC support?

The P87LPC767FN,112 integrates a four-channel, 8-bit successive-approximation A/D converter. Inputs AD0–AD3 map directly to Port 0 pins P0.3–P0.6, allowing simultaneous use with comparator functions (CIN1A/B, CIN2A/B) and general I/O-provided proper time-multiplexing and signal isolation are implemented in firmware.

Can the P87LPC767FN,112 operate without external passive components?

Yes-the P87LPC767FN,112 supports fully on-chip oscillator and reset configurations. When programmed to use the internal RC oscillator and on-chip power-on reset, only VDD and VSS connections are required for basic operation. This eliminates external crystals, capacitors, and reset ICs, reducing BOM cost and board space in high-volume, cost-sensitive applications using the P87LPC767FN,112.

What is the wakeup latency from Power Down mode for the P87LPC767FN,112?

Upon assertion of a valid low-level interrupt (e.g., on INT0, INT1, or any keypad interrupt pin), the P87LPC767FN,112 exits Power Down mode and resumes execution within approximately 2 oscillator cycles after the internal oscillator stabilizes. With the on-chip RC oscillator enabled, total wakeup time is under 10 µs-enabling rapid response to critical events while maintaining typical 1 µA quiescent current in standby.