NXP Semiconductors P89LPC935FHN,151

Overview

P89LPC935FHN,151 from NXP Semiconductors is an 8-bit accelerated two-clock 80C51 microcontroller in a 28-pin HVQFN package, featuring 8 kB flash memory, dual 8-bit ADCs (ADC0/ADC1), 512-byte data EEPROM, Capture/Compare Unit (CCU), and 23-bit system timer usable as RTC. It operates from 2.4 V to 3.6 V with 5 V-tolerant I/Os and supports industrial temperature range (−40 °C to +85 °C), targeting compact embedded control in sensor interfaces and programmable logic modules.

For engineers reviewing the P89LPC935FHN,151 datasheet, P89LPC935FHN,151 pinout, P89LPC935FHN,151 application, or P89LPC935FHN,151 equivalent, key selection criteria include its dual ADC capability, on-chip 512-byte EEPROM for parameter storage, CCU-based PWM generation, HVQFN thermal-enhanced packaging for space-constrained PCBs, and compatibility with ISP/IAP firmware updates in-system.

Technical Context

The P89LPC935FHN,151 implements an accelerated 80C51 core executing instructions in 2–4 clocks-six times faster than standard 80C51 at same frequency-enabling 111 ns to 222 ns instruction cycles at 18 MHz. Its architecture integrates dual 8-bit A/D converters (ADC0 with 4 channels, ADC1 with 4 channels), two analog comparators with selectable references, and a dedicated Capture/Compare Unit supporting input capture, output compare, and PWM functions.

It features a configurable on-chip oscillator (20 kHz–18 MHz), fractional baud rate UART, 400 kHz I²C bus, SPI interface, and a 23-bit system timer with RTC mode. Power management includes idle and two power-down modes with typical 1 μA total power-down current (voltage comparators disabled), low-voltage reset, and watchdog timer with independent on-chip oscillator.

Key Specifications

Pinout & Package

Package: HVQFN28 (plastic thermal enhanced very thin quad flat package; no leads; 28 terminals; body 6 × 6 × 0.85 mm; SOT788-1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with P89LPC936FDH, the P89LPC935FHN,151 offers sufficient code space for mid-complexity control tasks while delivering superior thermal performance in space-constrained layouts; versus P89LPC935FDH, it provides identical functionality with enhanced heat dissipation and smaller PCB footprint.

Availability

P89LPC935FHN,151 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart lighting controllers, programmable logic modules, and home appliance UI controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for P89LPC935FHN,151 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 applications, with deep expertise in microcontrollers and mixed-signal integration.

The P89LPC935FHN,151 belongs to NXP's LPC900 family of enhanced 80C51 microcontrollers, designed specifically for cost-sensitive, space-constrained embedded systems requiring integrated analog peripherals, low-power operation, and robust in-field firmware update capability.

FAQ

What is the maximum operating frequency of the P89LPC935FHN,151?

The P89LPC935FHN,151 supports a maximum operating frequency of 18 MHz when using an external crystal or resonator. Its internal RC oscillator is configurable from 20 kHz to 18 MHz and can be fine-tuned via flash configuration bits. At 18 MHz, instruction cycle times range from 111 ns to 222 ns-six times faster than a standard 80C51 running at the same clock.

Does the P89LPC935FHN,151 support in-application programming (IAP) of flash memory?

Yes, the P89LPC935FHN,151 supports In-Application Programming (IAP), allowing firmware code to be modified while the device is running. This enables dynamic updates, field calibration storage, and bootloader implementations without halting system operation-leveraging the 8 kB flash's byte-erasable architecture and dedicated SFRs like FMCON and FMDATA.

How many analog-to-digital converter channels does the P89LPC935FHN,151 provide?

The P89LPC935FHN,151 includes two independent 8-bit ADC subsystems: ADC0 with four channels (AD00–AD03) and ADC1 with four channels (AD10–AD13), totaling eight analog inputs. Both ADCs support selectable reference sources, burst mode, and boundary detection-enabling simultaneous monitoring of multiple sensors in industrial or consumer applications.

What package type is used for the P89LPC935FHN,151 and what are its thermal advantages?

The P89LPC935FHN,151 uses the HVQFN28 package (SOT788-1): a 6 × 6 × 0.85 mm thermal-enhanced very thin quad flat package with no leads. Its exposed thermal pad improves heat dissipation over TSSOP or PLCC variants, making it ideal for high-density PCBs and thermally demanding applications such as LED drivers or motor control modules.

Can the P89LPC935FHN,151 operate without external oscillator components?

Yes, the P89LPC935FHN,151 includes a high-accuracy internal RC oscillator selectable via flash configuration bits, supporting frequencies from 20 kHz to 18 MHz. This eliminates the need for external crystals or resonators in cost-sensitive or space-constrained designs, while retaining full functionality-including UART baud rate generation and system timing-without compromising stability.