Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

NXP Semiconductors P80C32UFAA,518

Name: P80C32UFAA,518
Brand: NXP Semiconductors
SKU: P80C32UFAA,518
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: P80C32UFAA,518

Manufacturer:: NXP Semiconductors

Category:: Microcontrollers

Package:: 44-LCC (J-Lead)

Datasheet:: P80C32UFAA,518.pdf

Description:: IC MCU 8BIT ROMLESS 44PLCC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,295

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

P80C32UFAA,518 from Philips Semiconductors is a ROMless 8-bit 80C51 microcontroller with 256 × 8 RAM, operating from 2.7 V to 5.5 V at up to 33 MHz, featuring three 16-bit timers, full-duplex UART, and four 8-bit I/O ports - used in industrial control modules requiring low-voltage, high-speed embedded logic with external program memory.

For engineers reviewing the P80C32UFAA,518 datasheet, P80C32UFAA,518 pinout, P80C32UFAA,518 application, or P80C32UFAA,518 equivalent, key selection criteria include its −40°C to +85°C extended temperature range, PLCC-44 package, static CMOS design enabling zero-frequency operation, and software-selectable idle/power-down modes for energy-constrained systems.

Technical Context

The P80C32UFAA,518 implements a static 8051 CPU core with Boolean processor, dual data pointers, and 4-level nested interrupt structure (6 sources, 4 priority levels). Its architecture supports external 64 KB program and 64 KB data memory addressing via multiplexed Port 0 (AD0–AD7) and Port 2 (A8–A15).

It integrates on-chip oscillator circuitry with XTAL1/XTAL2 pins, programmable clock-out on P1.0 (61 Hz–4 MHz at 16 MHz V_CC), and Timer 2 with capture/auto-reload/baud-rate generator modes - enabling precise timing, serial communication, and event-driven I/O without external peripherals.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	80C51 8-bit CPU with Boolean processor and static design - enables zero-frequency stop-clock operation without data loss.
RAM Size	256 × 8 bytes on-chip RAM - sufficient for real-time stack, register banking, and small buffer storage without external SRAM.
Max Operating Frequency	33 MHz at V_CC = 5 V - delivers ~33 million instructions/sec (12-cycle per instruction), suitable for responsive control loops.
Supply Voltage Range	2.7 V to 5.5 V - supports battery-backed, wide-input industrial power rails and mixed-voltage system interfacing.
Operating Temperature	−40°C to +85°C - qualified for automotive under-hood, factory automation, and outdoor embedded applications.
I/O Ports	Four 8-bit bidirectional ports (P0–P3) with Schmitt-trigger inputs and internal pull-ups - simplifies direct sensor/actuator interface without external biasing.
Serial Interface	Full-duplex UART with framing error detection and automatic address recognition - enables multi-drop RS-485 networks and protocol-transparent communication.

Pinout & Package

Package: Plastic Leaded Chip Carrier (PLCC), 44-pin, SOT187-2 footprint, body size 16.5 mm × 16.5 mm, lead pitch 0.65 mm.

Pin/Terminal	Circuit Role	Design Meaning
1, 12, 23, 34	NIC (No Internal Connection)	Unbonded die pads - must be left floating; no routing or soldering required.
2–9, 40–44, 1–3	P1.0–P1.7	General-purpose I/O with alternate functions: T2 (P1.0) and T2EX (P1.1) for Timer 2 event capture/reload control.
11, 13–19	P3.0–P3.7	Multiplexed I/O: RxD/TxD (serial), INT0/INT1 (level-sensitive interrupts), T0/T1 (timer inputs), WR/RD (external memory strobes).
24–31	P2.0–P2.7	High-order address bus A8–A15 during external memory access; retains port function when not addressing.
36–43, 30–37	P0.0–P0.7	Open-drain bidirectional port serving as multiplexed AD0–AD7 (address/data bus) - requires external pull-ups for memory interface.
10	RST	Asynchronous reset input - active-high, requires ≥2 machine cycles (24 oscillator periods); internal weak pull-down enables capacitor-based POR.
33	ALE	Address Latch Enable output - pulses at 1/6 oscillator frequency to latch P0's lower address byte; disableable via AUXR.0 for reduced EMI.
32	PSEN	Program Store Enable - active-low strobe for external ROM reads; suppressed during external data memory accesses.
35	EA/VPP	External Access Enable - held low to force code fetch from external memory; tied high for internal execution (not applicable - ROMless device).
21, 20	XTAL1, XTAL2	Oscillator input/output - supports crystal (1–33 MHz), ceramic resonator, or external clock drive on XTAL1 only.
22, 44	VSS, VCC	Ground and power supply pins - decoupling capacitor (0.1 µF) required near VCC/VSS for stable high-speed operation.

Key Features

Feature	Design Value
Static CMOS Core	Zero-frequency operation with full RAM/SFR retention - enables ultra-low-power sleep states and deterministic wake-up timing.
Power Control Modes	Idle mode (CPU halted, peripherals active) and Power-down mode (oscillator stopped, RAM retained down to 2.0 V) - reduces system power by >99% vs active mode.
Timer 2 Flexibility	Three configurable modes: 16-bit capture, auto-reload (up/down), and independent baud-rate generation - eliminates need for external timing ICs in comms-heavy designs.
Enhanced UART	Framing error detection and automatic address recognition - enables robust multi-processor communication over shared buses without host polling overhead.
Low-EMI Design	Programmable ALE inhibit (AUXR.0) and clock-out duty-cycle control - meets Class B EMC requirements in noise-sensitive industrial environments.
Extended Temperature Support	Guaranteed operation from −40°C to +85°C in PLCC package - validated for thermal cycling and long-term reliability in uncontrolled enclosures.

Applications

Industrial PLC I/O Module	Automotive Body Controller
Use Scenario: Standalone digital I/O expansion node in distributed control systems, interfacing with 24 V sensors and relay drivers via optocouplers. IC Role / Device Role / Timing Role: Primary controller executing ladder logic scan cycles, managing serial Modbus RTU communication, and servicing real-time interrupts from emergency stop inputs. Use Value: 33 MHz speed ensures sub-millisecond I/O update latency; −40°C to +85°C rating guarantees uptime in panel-mounted enclosures without forced cooling.	Use Scenario: Central body electronics unit coordinating door locks, window lifts, mirror controls, and interior lighting in entry-level vehicles. IC Role / Device Role / Timing Role: Low-voltage (2.7 V) operation sustains function during cold-cranking; UART with address recognition enables daisy-chained LIN-compatible diagnostics. Use Value: PLCC-44 package allows manual rework in low-volume assembly; idle-mode power reduction extends battery life during vehicle sleep states.
Medical Infusion Pump Controller	Smart Energy Meter Interface
Use Scenario: Safety-critical motor and valve sequencing engine with watchdog-free operation, driven by external EEPROM-stored therapy profiles. IC Role / Device Role / Timing Role: ROMless architecture isolates firmware from silicon - enables field updates via UART without MCU replacement; Timer 2 provides precise PWM for stepper motor microstepping. Use Value: Static design permits deterministic stop-clock for safety interlocks; dual data pointers accelerate buffer-to-buffer data movement during analog acquisition bursts.	Use Scenario: Sub-metering gateway aggregating pulse outputs from mechanical utility meters and transmitting via GPRS modem. IC Role / Device Role / Timing Role: External memory interface (P0/P2) connects to SPI-to-parallel bridge and flash storage; programmable clock-out synchronizes modem baud rate to cellular network timing. Use Value: 256-byte RAM accommodates TCP/IP stack fragments and encryption buffers; low-power modes extend backup battery life during grid outages.

Industrial PLC I/O Module

Automotive Body Controller

Use Scenario: Standalone digital I/O expansion node in distributed control systems, interfacing with 24 V sensors and relay drivers via optocouplers.

IC Role / Device Role / Timing Role: Primary controller executing ladder logic scan cycles, managing serial Modbus RTU communication, and servicing real-time interrupts from emergency stop inputs.

Use Value: 33 MHz speed ensures sub-millisecond I/O update latency; −40°C to +85°C rating guarantees uptime in panel-mounted enclosures without forced cooling.

Use Scenario: Central body electronics unit coordinating door locks, window lifts, mirror controls, and interior lighting in entry-level vehicles.

IC Role / Device Role / Timing Role: Low-voltage (2.7 V) operation sustains function during cold-cranking; UART with address recognition enables daisy-chained LIN-compatible diagnostics.

Use Value: PLCC-44 package allows manual rework in low-volume assembly; idle-mode power reduction extends battery life during vehicle sleep states.

Medical Infusion Pump Controller

Smart Energy Meter Interface

Use Scenario: Safety-critical motor and valve sequencing engine with watchdog-free operation, driven by external EEPROM-stored therapy profiles.

IC Role / Device Role / Timing Role: ROMless architecture isolates firmware from silicon - enables field updates via UART without MCU replacement; Timer 2 provides precise PWM for stepper motor microstepping.

Use Value: Static design permits deterministic stop-clock for safety interlocks; dual data pointers accelerate buffer-to-buffer data movement during analog acquisition bursts.

Use Scenario: Sub-metering gateway aggregating pulse outputs from mechanical utility meters and transmitting via GPRS modem.

IC Role / Device Role / Timing Role: External memory interface (P0/P2) connects to SPI-to-parallel bridge and flash storage; programmable clock-out synchronizes modem baud rate to cellular network timing.

Use Value: 256-byte RAM accommodates TCP/IP stack fragments and encryption buffers; low-power modes extend backup battery life during grid outages.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AT89C51-24PI	On-chip 4 KB Flash ROM, 128-byte RAM, max 24 MHz, PDIP-40 package - lacks Timer 2 and extended voltage range.	Best for cost-sensitive, fixed-firmware designs where external memory is unnecessary and ambient temperature stays within 0°C–70°C.	Select when firmware size ≤4 KB and board layout cannot accommodate PLCC-44 or extended temp requirements.
STC89C52RC-PD	8 KB Flash, 512-byte RAM, 12–35 MHz, built-in ISP, 5 V only - adds ADC and enhanced UART but no −40°C rating or PLCC option.	Suitable for rapid prototyping with USB-to-serial programming and analog sensor integration, but unsuitable for automotive or industrial thermal environments.	Choose for development-stage projects needing in-system programming and analog front-end capability, not production-grade extended-temp deployment.

Compared with AT89C51-24PI and STC89C52RC-PD, the P80C32UFAA,518 offers guaranteed −40°C to +85°C operation, ROMless flexibility for field-upgradable systems, and Timer 2 - making it uniquely suited for industrial control nodes requiring external memory, precise timing, and wide-temperature resilience.

Availability

P80C32UFAA,518 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body controllers, medical infusion pump controllers, and smart energy meter interfaces requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for P80C32UFAA,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 pioneer in 8-bit microcontroller innovation, delivering high-reliability, industry-qualified ICs for mission-critical embedded systems since the 1980s.

The 80C32 belongs to Philips' 80C51 family - designed specifically for ROMless, low-voltage, high-speed control applications where external program memory, extended temperature tolerance, and static power management are essential.

FAQ

What is the maximum operating frequency of the P80C32UFAA,518?

The P80C32UFAA,518 supports a maximum operating frequency of 33 MHz at V_CC = 5 V. This is confirmed in the Philips Product Specification (2000 Aug 07) under "TWO speed ranges at VCC = 5 V" - listing 0 to 33 MHz for U-suffix devices. The P80C32UFAA,518 achieves this using high-density CMOS process and optimized 8051 core timing.

Does the P80C32UFAA,518 include on-chip program memory?

No, the P80C32UFAA,518 is a ROMless device - it contains no on-chip program memory and relies entirely on external EPROM or Flash memory accessed via P0 and P2. This is explicitly stated in the "SELECTION TABLE" and "DESCRIPTION" sections of the Philips datasheet, distinguishing it from 80C51 variants with embedded ROM/EPROM.

What package type and pin count does the P80C32UFAA,518 use?

The P80C32UFAA,518 uses a 44-pin Plastic Leaded Chip Carrier (PLCC) package, drawing number SOT187-2. This is confirmed in the "80C32 ORDERING INFORMATION" table, where "UFAA" decodes to U (33 MHz), F (−40°C to +85°C), and AA (PLCC). Pin configuration matches SU01062 logic diagram.

How does the P80C32UFAA,518 handle power management?

The P80C32UFAA,518 implements two software-controlled low-power modes: Idle mode (CPU halted, RAM/timers/UART/interrupts active) and Power-down mode (oscillator stopped, RAM retained down to 2.0 V). Wake-up from Power-down is supported via hardware reset or level-sensitive INT0/INT1, controlled by WUPD bit in AUXR1.

What is the function of the EA/VPP pin on the P80C32UFAA,518?

On the P80C32UFAA,518, the EA/VPP pin (Pin 35) must be externally held low to enable code fetch from external program memory - consistent with its ROMless architecture. Since the device has no internal ROM, EA/VPP serves solely as External Access Enable; it is never used for programming voltage (VPP) as no on-chip memory exists to program.

P80C32UFAA,518 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Package/Case:: 44-LCC (J-Lead)

Series:: 80C

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Core Processor:: 8051

Core Size:: 8-Bit

Speed:: 33MHz

Connectivity:: UART/USART

Peripherals:: POR

Number of I/O:: 32

Program Memory Size:: -

Program Memory Type:: ROMless

EEPROM Size:: -

RAM Size:: 256 x 8

Voltage - Supply (Vcc/Vdd):: 2.7V ~ 5.5V

Data Converters:: -

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

P80C32UFAA,518 FAQ

1.How can I place an order for P80C32UFAA,518 through Aetrix?

Please submit a Request for Quotation (RFQ) for P80C32UFAA,518 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for P80C32UFAA,518 reliable?

The price and inventory of P80C32UFAA,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P80C32UFAA,518 is usually 5 days.

3.What payment methods are accepted for P80C32UFAA,518?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P80C32UFAA,518 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for P80C32UFAA,518?

P80C32UFAA,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your P80C32UFAA,518 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for P80C32UFAA,518?

For technical support, including P80C32UFAA,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P80C32UFAA,518 requirements.

6.How does Aetrix verify that P80C32UFAA,518 is sourced from the original manufacturer or authorized distributors?

All P80C32UFAA,518 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that P80C32UFAA,518 meets industry standards.

7.What is the process for return or replacement of P80C32UFAA,518?

All P80C32UFAA,518 units undergo pre-shipment inspection (PSI). If there is an issue with P80C32UFAA,518, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The P80C32UFAA,518 part is unused and in its original packaging.

Return procedure for P80C32UFAA,518:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…