NXP Semiconductors P87LPC769HD,518

Overview

P87LPC769HD,518 from Philips Semiconductors is a 20-pin, low-power 80C51-based microcontroller with 4 kB OTP EPROM, 128-byte RAM, dual DAC outputs (DAC0/DAC1), four-channel 8-bit A/D converter (AD0–AD3), and integrated I²C and UART interfaces. It operates from 4.5 V to 5.5 V at up to 20 MHz and supports industrial temperature range (–40 °C to +125 °C) in SO-20 package - ideal for cost-sensitive embedded control in sensor signal conditioning and LED driver systems.

For engineers reviewing the P87LPC769HD,518 datasheet, P87LPC769HD,518 pinout, P87LPC769HD,518 application, or P87LPC769HD,518 equivalent, key selection criteria include its on-chip RC oscillator option eliminating external crystals, programmable port output modes (quasi-bidirectional/open-drain/push-pull), 1 µA Power Down current, dual analog comparators (CMP1/CMP2), and 32-byte customer code space for device serialization.

Technical Context

The P87LPC769HD,518 implements an accelerated 80C51 core executing instructions in 300–600 ns at 20 MHz, with dual 16-bit timers (T0/T1), full-duplex UART supporting four modes, and I²C master/slave capability via SDA/SCL pins. Its analog subsystem integrates two independent comparators with selectable reference (CMPREF), four A/D input channels sharing port pins, and two dedicated DAC outputs - one shared with AD0.

Power management includes Brownout Detection (BOD), Power-On Reset (POR), and two low-power states: Idle Mode (CPU halted, peripherals active) and Power Down Mode (1 µA typical, wake-up via INT0/INT1 or comparator event). Oscillator configuration is user-programmable via EPROM bits to support crystal (X1/X2), external clock, or on-chip RC options.

Key Specifications

Pinout & Package

Package: Plastic Small Outline (SO-20), SOT163–1, 20-pin surface-mount package rated for –40 °C to +125 °C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with P87LPC769HD,518, the P89LPC922FA,518 offers greater memory and speed but requires external DACs, while the AT89LP2052-20PU omits all analog functions - making P87LPC769HD,518 uniquely suitable for compact mixed-signal designs requiring integrated A/D, DAC, and comparators in a 20-pin SO package.

Availability

P87LPC769HD,518 is available at Aetrix Electronics and suitable for industrial sensor interface, smart LED lighting control, low-cost keypad-based HMI, and power supply monitor & sequencer applications requiring stable component supply across extended temperature ranges.

Supply support for P87LPC769HD,518 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

Philips Semiconductors (now NXP Semiconductors) is a global semiconductor leader specializing in high-reliability, application-optimized ICs for automotive, industrial, and consumer markets.

The P87LPC769HD,518 belongs to the LPC700 family of low-pin-count 80C51 microcontrollers designed for cost-sensitive, space-constrained embedded systems requiring integrated analog peripherals and robust power management.

FAQ

What is the maximum operating frequency of the P87LPC769HD,518?

The P87LPC769HD,518 operates at up to 20 MHz when supplied at 4.5 V to 5.5 V. At lower supply voltages (e.g., 3 V), the maximum frequency is reduced to 10 MHz. This frequency limit is enforced by the internal oscillator circuitry and must be observed to ensure reliable instruction execution and peripheral timing compliance in the P87LPC769HD,518.

Does the P87LPC769HD,518 support in-circuit programming?

Yes, the P87LPC769HD,518 supports serial EPROM programming via its UART interface, enabling simple in-circuit production coding. The device includes two EPROM security bits that prevent unauthorized reading of the application program stored in the 4 kB OTP memory - a key feature for protecting intellectual property in the P87LPC769HD,518.

Can both DAC outputs of the P87LPC769HD,518 operate simultaneously?

Yes, DAC0 (P1.7) and DAC1 (P1.6) are independent 8-bit outputs and can be updated simultaneously via their respective SFRs (DAC0# and DAC1#). However, DAC0 shares its physical pin with AD0, so the pin must be configured exclusively for DAC or ADC operation - not both concurrently - in the P87LPC769HD,518.

How does the P87LPC769HD,518 handle brownout conditions?

The P87LPC769HD,518 includes on-chip Brownout Detection (BOD) that triggers a reset when VDD falls below a threshold (~4.2 V typical). This function can optionally be configured as an interrupt instead of a reset, allowing firmware to execute controlled shutdown routines before power loss - a critical safety feature in the P87LPC769HD,518.

What packaging and temperature grade is specified for the P87LPC769HD,518?

The P87LPC769HD,518 is packaged in a 20-pin Plastic Small Outline (SO-20) package per drawing SOT163–1 and is rated for industrial temperature operation from –40 °C to +125 °C. This makes it suitable for under-hood automotive modules, industrial motor controls, and outdoor equipment where extended thermal performance is required in the P87LPC769HD,518.