Infineon Technologies MB91F526LKCPMC-GSK5E1

Overview

MB91F526LKCPMC-GSK5E1 from Infineon Technologies (formerly Cypress) is a 32-bit FR81S microcontroller designed for automotive powertrain and body control units. It features an 80 MHz CPU, 1024 + 64 KB program flash, 128 KB main RAM + 8 KB backup RAM, IEEE 754-compliant FPU, and triple CAN 2.0B controllers supporting up to 1 Mbps - deployed in engine control modules requiring deterministic real-time response and functional safety support.

For engineers reviewing the MB91F526LKCPMC-GSK5E1 datasheet, MB91F526LKCPMC-GSK5E1 pinout, MB91F526LKCPMC-GSK5E1 application, or MB91F526LKCPMC-GSK5E1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (-40 °C to +125 °C), integrated memory protection unit (MPU), dual-clock supervisor with CR fallback, LIN 2.1 and I²C interfaces, and hardware CRC generation for firmware integrity verification.

Technical Context

The MB91F526LKCPMC-GSK5E1 implements the FR81S 32-bit RISC core with 5-stage pipeline, Harvard architecture, and instruction compatibility with the FR family. It integrates a PLL clock multiplier (1×–20×), 100 kHz CR oscillator, and sub-oscillator supervision - enabling robust timing resilience in automotive environments where main crystal failure must trigger fail-safe clock switching.

Peripheral integration includes three independent CAN controllers (128/64/64 message buffers), 12-channel multi-function serial interface (UART/CSIO/LIN/I²C), 48-channel PPG for LED and motor timing, and 48-channel 12-bit ADC with 1.4 μs conversion time - all mapped to 152 GPIOs (150 with sub-oscillator enabled) in a 176-pin LQFP package with 5 V tolerant inputs on designated pins.

Key Specifications

Pinout & Package

MB91F526LKCPMC-GSK5E1 is housed in a 176-pin LQFP (16 mm × 16 mm, 0.4 mm pitch) package with exposed thermal pad. Pin functions are defined across multiple I/O groups including dedicated CANH/CANL, LIN, UART, CSIO, I²C, PPG, ADC, and external interrupt inputs - all supporting 5 V tolerance on specified channels (ch.6, ch.8, ch.9, ch.11).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit automotive microcontroller applications.

Compared with RH850/F1K and S32K144, MB91F526LKCPMC-GSK5E1 delivers unique value in cost-sensitive, timing-deterministic automotive nodes requiring integrated PPG, LIN 2.1 hardware acceleration, and sub-oscillator supervision - without ARM licensing or complex multicore software overhead.

Availability

MB91F526LKCPMC-GSK5E1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and electric power steering systems requiring stable component supply across extended automotive lifecycles.

Supply support for MB91F526LKCPMC-GSK5E1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive MCUs, and security solutions, with global R&D and manufacturing infrastructure.

This device belongs to the CY91520 series - a family of FR81S-based 32-bit microcontrollers engineered for AEC-Q100-compliant automotive applications demanding real-time determinism, functional safety primitives, and mixed-signal integration.

FAQ

What is the maximum operating frequency and how is it achieved?

The MB91F526LKCPMC-GSK5E1 achieves 80 MHz maximum CPU frequency using an on-chip PLL with programmable multiplication factor (1× to 20×) driven by a 4.0 MHz external crystal. This configuration yields a 12.5 ns minimum instruction execution time and maintains full timing compliance across the -40 °C to +125 °C operating range per AEC-Q100 Grade 1 requirements.

Does this MCU support functional safety standards like ISO 26262?

While not pre-certified to ISO 26262, the MB91F526LKCPMC-GSK5E1 includes hardware features required for ASIL-B decomposition: memory protection unit (MPU), ECC on flash and RAM, hardware CRC generator, dual-clock supervision with CR fallback, and TPU-based timing watchdog - enabling systematic safety mechanisms in customer-designed safety architectures.

How many CAN interfaces does it have, and what are their buffer configurations?

It integrates three independent CAN 2.0B controllers: Channel 0 supports 128 message buffers (64 transmit + 64 receive), while Channels 1 and 2 each support 64 message buffers (32 transmit + 32 receive). All channels operate up to 1 Mbps and include dedicated message object RAM, acceptance filtering, and error counters accessible via memory-mapped registers.

Is the 176-pin LQFP package lead-free and RoHS compliant?

Yes, MB91F526LKCPMC-GSK5E1 uses a lead-free, RoHS-compliant 176-pin LQFP package (package code LQD176) with matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements. The thermal pad design supports efficient heat dissipation in high-temperature automotive environments.