NXP Semiconductors P89LPC936FDH,518

Overview

P89LPC936FDH,518 from NXP Semiconductors is an 8-bit accelerated two-clock 80C51 microcontroller in TSSOP28 package, featuring 16 kB byte-erasable flash memory, dual 8-bit ADCs (ADC0/ADC1), 512-byte on-chip data EEPROM, and Capture/Compare Unit (CCU) for PWM and input capture - deployed in industrial sensor nodes requiring integrated analog I/O and low-power operation.

For engineers reviewing the P89LPC936FDH,518 datasheet, P89LPC936FDH,518 pinout, P89LPC936FDH,518 application, or P89LPC936FDH,518 equivalent, key selection criteria include its 16 kB flash with single-byte erasure for firmware+data co-storage, dual ADC support with 8-channel analog input capability, CCU-based PWM generation, 2.4–3.6 V operation with 5 V-tolerant I/O, and TSSOP28 footprint compatibility with space-constrained embedded control designs.

Technical Context

The P89LPC936FDH,518 implements a high-performance 80C51 core executing instructions in 2–4 clocks (6× speed vs. standard 80C51 at same frequency), enabling 111–222 ns instruction cycles at 18 MHz. Its architecture integrates dual 8-bit A/D converters (ADC0: AD00–AD03; ADC1: AD10–AD13), two 16-bit counter/timers, a 23-bit system timer usable as RTC, and a dedicated Capture/Compare Unit supporting four PWM outputs (OCA/OCC/OCB/OCD) and two input capture channels (ICA/ICB).

It includes a configurable on-chip RC oscillator (20 kHz–18 MHz), fractional baud rate UART, 400 kHz I²C, SPI, two analog comparators with selectable references, and programmable port output modes (quasi-bidirectional, open-drain, push-pull). Power management features include idle mode, two power-down modes (1 μA typical), brownout detect, and software reset.

Key Specifications

Pinout & Package

Package: TSSOP28 (plastic thin shrink small outline package; 28 leads; body width 4.4 mm; SOT361-1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with P89LPC935FDH, the P89LPC936FDH,518 offers double flash capacity for complex firmware or embedded data logging, while PCA9306D,118 serves a fundamentally different interface function and cannot substitute for MCU functionality.

Availability

P89LPC936FDH,518 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, and programmable logic relays requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for P89LPC936FDH,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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with headquarters in Eindhoven, Netherlands.

The P89LPC936FDH,518 belongs to NXP's LPC900 family of enhanced 80C51 microcontrollers, designed specifically for cost-sensitive, space-constrained embedded control applications demanding integrated analog peripherals, low power, and robust I/O flexibility.

FAQ

What is the maximum operating frequency of the P89LPC936FDH,518?

The P89LPC936FDH,518 supports a maximum operating frequency of 18 MHz when using the external crystal/resonator or internal RC oscillator. At this frequency, 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. The P89LPC936FDH,518's flash configuration bits allow user-selectable oscillator options from 20 kHz to 18 MHz.

Does the P89LPC936FDH,518 support in-system programming (ISP)?

Yes, the P89LPC936FDH,518 supports In-System Programming (ISP) via its UART interface, enabling firmware updates while the device is mounted in the target application. This capability eliminates the need for socketed programming and allows field upgrades. The P89LPC936FDH,518 also supports In-Application Programming (IAP) for dynamic code modification during runtime, and Serial Flash In-Circuit Programming (ICP) for production-line programming using standard EPROM programmers.

How many analog-to-digital converter channels does the P89LPC936FDH,518 have?

The P89LPC936FDH,518 integrates two independent 8-bit ADC subsystems: ADC0 with four input channels (AD00–AD03) and ADC1 with four input channels (AD10–AD13), totaling eight analog inputs. Both ADCs support programmable conversion speed, reference selection, and burst mode operation. This dual-ADC architecture enables concurrent sampling of multiple sensors - for example, measuring temperature (ADC0) and supply voltage (ADC1) simultaneously - without multiplexer latency.

What is the purpose of the Capture/Compare Unit (CCU) in the P89LPC936FDH,518?

The Capture/Compare Unit (CCU) in the P89LPC936FDH,518 provides hardware-accelerated timing functions including four PWM outputs (OCA/OCC/OCB/OCD) and two input capture inputs (ICA/ICB). It offloads precise waveform generation and edge-timing measurement from the CPU, enabling deterministic motor control, LED dimming, and encoder position tracking. The P89LPC936FDH,518's CCU operates independently of the main processor, ensuring jitter-free signal generation even during interrupt-heavy operation.

Is the P89LPC936FDH,518 compatible with 5 V logic interfaces?

Yes, the P89LPC936FDH,518 features 5 V-tolerant I/O pins - all port pins can be safely pulled up to or driven by 5.5 V signals while operating from a 2.4–3.6 V supply. This eliminates the need for external level translators when interfacing with legacy 5 V peripherals such as sensors, displays, or industrial I/O modules. However, the internal peripherals (ADC, comparators, UART) operate from the 3.3 V domain, so analog reference and signal conditioning must respect the VDD range.