Infineon Technologies MB89P475-101PMC-GSE1

Overview

MB89P475-101PMC-GSE1 from Fujitsu (now Cypress) is an OTP-programmable 8-bit F2MC-8L microcontroller with 16 KB internal PROM, 1 KB RAM, 10-bit 8-channel ADC, UART/SIO, dual 8/16-bit timer/counters, PWM timer, PWC timer, and watchdog reset. It operates from 3.5 V to 5.5 V at up to 12.5 MHz (0.32 µs min instruction cycle), targeting home appliance control systems requiring low-power sleep/stop modes and integrated analog-peripheral interfacing.

For engineers reviewing the MB89P475-101PMC-GSE1 datasheet, MB89P475-101PMC-GSE1 pinout, MB89P475-101PMC-GSE1 application, or MB89P475-101PMC-GSE1 equivalent, key selection criteria include OTP programmability vs mask ROM, 1 KB RAM allocation for stack/data buffers, 12.5 MHz timing headroom for real-time interrupt handling (2.88 µs min latency), and QFP-48 package compatibility with legacy Fujitsu/Cypress board layouts.

Technical Context

The MB89P475 implements the proprietary F2MC-8L CPU core with 136 instructions, 8-/16-bit arithmetic support, bit-test-and-branch logic, and optimized controller instruction set. Its peripheral architecture integrates six independent timers-including two configurable 8/16-bit timer/counters (T1–T4), a 21-bit timebase timer, watch prescaler, PWC, and PWM-with shared clock sources (main clock, subclock, or external).

It supports dual-clock operation (main + 32.768 kHz subclock) enabling watch mode and subclock mode, and includes five low-level wake-up interrupts plus four edge-selectable external interrupts. The 10-bit ADC features software-triggered conversion with 60 instruction-cycle acquisition time and repeat activation via internal clock.

Key Specifications

Pinout & Package

MB89P475-101PMC-GSE1 uses a 48-pin LQFP (FPT-48P-M26) package with 0.5 mm pitch and exposed thermal pad. Pin assignments match DIP-48P-M01 mechanical outline per Fujitsu DS07-12552-2E, with dedicated AVCC/AVSS for ADC noise isolation and high-current drive capability on P30–P36 (buzzer output).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MB89475-101PMC-GSE1, this OTP variant trades mask ROM cost for development flexibility; versus CY8C20xx7, it retains legacy mechanical I/O but lacks integrated touch sensing-making it optimal for cost-sensitive, non-touch appliance upgrades with existing PCB footprints.

Availability

MB89P475-101PMC-GSE1 is available at Aetrix Electronics and suitable for refrigerator control units, air conditioner indoor units, washing machine main boards, and microwave oven control panels requiring stable component supply and long-term industrial lifecycle support.

Supply support for MB89P475-101PMC-GSE1 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

Fujitsu Microelectronics (acquired by Cypress Semiconductor in 2014) specialized in low-power, high-reliability microcontrollers for consumer and industrial appliances before integration into Infineon's embedded portfolio.

This part belongs to the MB89470 Series - a family of F2MC-8L 8-bit microcontrollers designed specifically for cost-sensitive, mixed-signal home appliance control where OTP programmability, dual-clock RTC support, and integrated analog peripherals reduce BOM count and board space.

FAQ

What is the maximum operating frequency and corresponding instruction cycle time?

The MB89P475-101PMC-GSE1 supports up to 12.5 MHz main clock frequency, delivering a minimum instruction execution time of 0.32 µs. This timing is verified across voltage range (3.5–5.5 V) and ambient temperature (–20°C to +75°C), enabling deterministic real-time response for motor control and sensor sampling loops without pipeline stalls.

Does this microcontroller support in-system programming (ISP)?

No - MB89P475-101PMC-GSE1 uses one-time programmable (OTP) PROM and requires external ROM programming prior to soldering. It does not support ISP or flash-based field updates. Programming is performed using Fujitsu-compatible PROM programmers (e.g., BP Microsystems Model 3000) with socket adapters for FPT-48P-M26 packages.

How many external interrupt sources are available and what triggering modes do they support?

The device provides nine total external interrupt inputs: four edge-selectable (INT10–INT13) supporting rising/falling edge configuration, and five low-level active (INT20–INT24) for wake-up from Stop mode. All nine have dedicated vector addresses and request flags, enabling prioritized, low-latency response without software polling.

What are the key differences between MB89P475 and MB89PV470 in terms of memory and power-on behavior?

MB89P475 uses 16 KB internal OTP PROM and exhibits defined power-on oscillation stabilization time; MB89PV470 relies on external EPROM via piggyback socket and has no power-on stabilization delay. Additionally, MB89PV470 consumes higher active current due to external EPROM loading, while MB89P475 offers lower active power and identical sleep/stop current profiles to MB89475.