Infineon Technologies MB91F523JSEPMC-GSE1

Overview

MB91F523JSEPMC-GSE1 from Cypress Semiconductor is a 32-bit FR81S RISC microcontroller designed for automotive powertrain and body control units. It features an 80 MHz CPU, 384 KB + 64 KB program flash, 48 KB main RAM + 8 KB backup RAM, IEEE 754-compliant FPU, and triple CAN 2.0B controllers supporting up to 1 Mbps. Used in engine control modules requiring real-time deterministic response and functional safety support.

For engineers reviewing the MB91F523JSEPMC-GSE1 datasheet, MB91F523JSEPMC-GSE1 pinout, MB91F523JSEPMC-GSE1 application, or MB91F523JSEPMC-GSE1 equivalent, this page delivers verified technical context, package mapping, peripheral timing constraints, memory protection configuration, and automotive-grade thermal and voltage operating margins.

Technical Context

The MB91F523JSEPMC-GSE1 implements the FR81S core with 5-stage pipeline, Harvard architecture, and instruction-level multiplier support-enabling 5-cycle signed 32-bit multiplication and 3-cycle signed 16-bit multiplication. It integrates MPU with eight configurable protection areas and dual-mode privilege enforcement (user/privilege).

Peripheral subsystems include three independent CAN controllers (128/64-message buffers), 48-channel PPG for LED and motor timing, 12-bit A/D converter with 48 channels and 1.4 μs conversion time, and multi-protocol serial interfaces (UART, CSIO/SPI, LIN 2.1, I²C) with 64-step FIFOs and DMA transfer support across all channels.

Key Specifications

Pinout & Package

MB91F523JSEPMC-GSE1 is housed in a 176-pin LQFP (16 mm × 16 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined across four I/O groups (P0–P3), CANH/CANL differential pairs, dedicated reset and clock inputs, and multiplexed peripheral signals including UART, LIN, SPI, I²C, and PPG outputs.

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, the MB91F523JSEPMC-GSE1 offers superior peripheral integration (triple CAN, LIN, 48-channel PPG, calibrated RTC) and FR-family instruction compatibility-making it optimal for cost-sensitive, high-I/O automotive modules where ASIL-B suffices and legacy software reuse matters.

Availability

MB91F523JSEPMC-GSE1 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, body control modules, and advanced lighting systems requiring stable component supply across extended automotive lifecycles.

Supply support for MB91F523JSEPMC-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

Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability semiconductor solutions for automotive, industrial, and IoT markets, with emphasis on integration, security, and functional safety.

The MB91520 series targets automotive body and powertrain applications requiring real-time determinism, mixed-signal integration, and AEC-Q100 qualification-delivering FR-family compatibility with modern peripherals like CAN FD-ready controllers and calibrated RTC.

FAQ

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

The MB91F523JSEPMC-GSE1 achieves 80 MHz system clock via on-chip PLL with programmable multiplication (1× to 20×) of a 4.0 MHz external crystal. Minimum instruction execution time is 12.5 ns, confirmed in the electrical characteristics table (Rev. *F, p.133). The PLL supports SSCG (spread-spectrum clock generation) to reduce EMI.

Does this MCU support functional safety standards such as ISO 26262?

Yes-the MB91F523JSEPMC-GSE1 includes hardware features required for ASIL-B compliance: ECC on flash and RAM, memory protection unit (MPU), clock supervisor with dual-oscillator monitoring, hardware watchdog timer, and lockstep-capable peripherals. It is AEC-Q100 Grade 1 qualified (−40 °C to +125 °C).

How many CAN interfaces does MB91F523JSEPMC-GSE1 support, and what are their buffer configurations?

It supports three independent CAN 2.0B controllers: Channel 0 provides 128 message buffers (64 transmit + 64 receive); Channels 1 and 2 each provide 64 message buffers (32 transmit + 32 receive). All channels operate up to 1 Mbps and support mailbox-based filtering and priority arbitration.

Is there a built-in real-time clock (RTC), and can it maintain time during low-power modes?

Yes-the RTC is hardware-based and operates from either the main (4–16 MHz) or sub-clock (32 kHz) oscillator. In Watch mode, it continues running with <1 μA current draw while main logic is powered down. Calibration is supported via prescaler register to correct sub-clock drift against main clock reference.