NXP Semiconductors P80C552EBA/08,518

Overview

P80C552EBA/08,518 from Philips Semiconductors is a ROMless 8-bit microcontroller based on the 80C51 core, featuring a 10-bit ADC with eight analog inputs, dual PWM outputs (PWM0/PWM1), a dedicated capture/compare timer (T2) with four capture and three compare registers, I²C-bus and UART serial interfaces, and two power-saving modes (idle and power-down). It operates at up to 16 MHz and targets embedded control in industrial sensor systems, motor timing modules, and programmable logic controllers.

For engineers reviewing the P80C552EBA/08,518 datasheet, P80C552EBA/08,518 pinout, P80C552EBA/08,518 application, or P80C552EBA/08,518 equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for legacy 80C51-based designs requiring analog acquisition and high-speed digital output control.

Technical Context

The P80C552EBA/08,518 implements an enhanced 80C51 CPU with identical instruction set compatibility but adds a third 16-bit timer (T2) with independent capture latches (CT0I–CT3I) and comparator outputs (CMSR0–CMSR5, CMT0/CMT1), enabling precise event timing and synchronized waveform generation. Its dual 8-bit PWM outputs are hardware-timed and fully decoupled from the main CPU execution flow.

It integrates an 8-channel, 10-bit successive-approximation ADC with configurable reference (AVREF±), sampling time of 8 oscillator cycles, and conversion time of 50 cycles - all accessible via Port 5 as dedicated analog inputs. The I²C-bus interface supports master/slave byte-oriented transfers with programmable clock rates up to 400 kHz (in non-I²C-compliant modes), while UART remains fully 80C51-compatible.

Key Specifications

Pinout & Package

Package: Plastic Leaded Chip Carrier (PLCC), 68-pin, SOT188-2, operating temperature range 0 °C to +70 °C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT89C51RC2-UM and STC89C52RC-PD, the P80C552EBA/08,518 provides unique integration of hardware capture/compare logic, dual PWM, and I²C - reducing external component count and improving determinism in timing-critical industrial control loops.

Availability

P80C552EBA/08,518 is available at Aetrix Electronics and suitable for industrial motor control, programmable logic controller (PLC) I/O modules, and embedded power supply monitoring requiring stable component supply across extended product lifecycles.

Supply support for P80C552EBA/08,518 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 integrated circuit design, delivering high-reliability components for automotive, industrial, and consumer electronics since the 1950s.

The 80C552 family was designed specifically for real-time embedded control in harsh environments - integrating analog acquisition, precise timing, and multiple serial protocols into a single 80C51-compatible die to simplify industrial system architecture.

FAQ

What is the maximum operating frequency supported by the P80C552EBA/08,518?

The P80C552EBA/08,518 supports a maximum oscillator frequency of 16 MHz, as confirmed by its ordering code suffix "EBA" (denoting 0 °C to +70 °C, 16 MHz PLCC variant). At this frequency, 58% of instructions execute in 0.75 µs, and multiply/divide operations complete in 3 µs - enabling tight control loop timing in motor and power applications.

Does the P80C552EBA/08,518 include on-chip program memory?

No, the P80C552EBA/08,518 is the ROMless version of the 8XC552 family. It relies on external program memory accessed via Port 0 (AD0–AD7), Port 2 (A8–A15), and control signals (EA, ALE, PSEN). This enables field-upgradable firmware using external EPROM or flash, unlike the mask-ROM 83C552 or EPROM-based 87C552 variants.

How does the P80C552EBA/08,518 handle analog-to-digital conversion triggering?

The P80C552EBA/08,518 supports both software-initiated and hardware-triggered ADC conversions. The STADC pin (Pin 3) provides a dedicated hardware start signal - allowing external events (e.g., PWM edge or timer overflow) to synchronize sampling. This ensures deterministic timing alignment critical for closed-loop control and power quality analysis.

Can the P80C552EBA/08,518 operate in low-power modes, and what peripherals remain active?

Yes, the P80C552EBA/08,518 supports idle and power-down modes controlled via the PCON register. In idle mode, the CPU halts but RAM, timers (T0/T1/T2), UART, I²C, and interrupts remain fully operational - drawing ≤10 mA at 16 MHz. In power-down mode, only RAM contents are retained; oscillator and all peripherals stop, reducing current to ≤50 µA.

What are the key differences between the P80C552EBA/08,518 and the 83C552 variant?

The P80C552EBA/08,518 is ROMless, while the 83C552 contains 8 kB of mask-programmable ROM. Both share identical peripheral sets (10-bit ADC, dual PWM, T2 capture/compare, I²C, UART), pinout, and instruction set. The P80C552EBA/08,518 requires external program memory and offers firmware flexibility; the 83C552 provides secure, fixed-code execution with optional ROM code protection.