Infineon Technologies MB91F577BHSPMC-GSK5E1

Overview

MB91F577BHSPMC-GSK5E1 from Infineon Technologies (formerly Cypress) is a 32-bit automotive-grade microcontroller based on the FR81S CPU core, operating at up to 80 MHz with 1024 + 64 KB program flash, 64 KB main RAM, and 8 KB backup RAM. It integrates dual CAN controllers (C-CAN), LIN-UART (6 channels), 32-bit free-run timers (6 channels), 16-bit PPG (24 channels), A/D converter (40 ch, 10-bit, 3 µs), D/A converter (2 ch, 8-bit), RTC, and LCD controller (4-com, 32-seg). It targets engine control units and body electronics requiring deterministic real-time response.

For engineers reviewing the MB91F577BHSPMC-GSK5E1 datasheet, MB91F577BHSPMC-GSK5E1 pinout, MB91F577BHSPMC-GSK5E1 application, or MB91F577BHSPMC-GSK5E1 equivalent, key selection criteria include its LQFP-144 package, 5 V/3.3 V I/O flexibility via VCCE, C-CAN compliance up to 1 Mbps, FR81S instruction compatibility, and built-in FPU for IEEE754 floating-point math in safety-critical control loops.

Technical Context

The MB91F577BHSPMC-GSK5E1 implements a Harvard-architecture FR81S RISC core with 5-stage pipeline, 16 general-purpose 32-bit registers, and 16-bit fixed-length instructions executing at 1 cycle per instruction. Its memory protection unit (MPU) defines eight configurable access regions with privilege/user mode enforcement.

Peripheral integration includes three C-CAN channels supporting up to 1 Mbps with 64-message buffers (1 channel) or 32-message buffers (2 channels), four multi-function serial interfaces (UART/CSIO/LIN-UART/I²C), and a hardware CRC generator. Clock supervision monitors both 4 MHz main and 32 kHz sub oscillators, switching to CR clock on failure.

Key Specifications

Pinout & Package

LQFP-144 package with 0.5 mm pitch, 20 × 20 mm body size, and exposed thermal pad. Pin functions defined per Infineon document 002-04725 Rev. *B, pages 11–12 (Pin Assignment) and 13–28 (Pin Description).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MB91F575BHSPMC-GSK5E1 and MB91F578BHSPMC-GSK5E1, the MB91F577BHSPMC-GSK5E1 delivers optimal balance of memory (1024 KB flash, 64 KB RAM), LQFP-144 footprint, and peripheral count for mid-tier automotive ECUs-avoiding over-specification while ensuring headroom for future feature expansion.

Availability

MB91F577BHSPMC-GSK5E1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and electric power steering systems requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100 qualification traceability.

Supply support for MB91F577BHSPMC-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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and security solutions, with global R&D and manufacturing infrastructure.

The CY91570 series-including MB91F577BHSPMC-GSK5E1-is part of Infineon's automotive microcontroller portfolio designed specifically for ASIL-B compliant powertrain and chassis control applications using the FR architecture.

FAQ

What is the maximum operating frequency and corresponding instruction timing of the MB91F577BHSPMC-GSK5E1?

The MB91F577BHSPMC-GSK5E1 operates at a maximum frequency of 80 MHz using its internal PLL (20× multiplication of 4 MHz crystal). This yields a minimum instruction execution time of 12.5 ns per basic instruction, enabled by its 5-stage pipeline and 16-bit fixed-length instruction set. All timing values are validated per Infineon's electrical characteristics table (Section 13.4, Rev. *B).

Does this MCU support AEC-Q100 qualification and what grade is it rated for?

Yes, the MB91F577BHSPMC-GSK5E1 is qualified to AEC-Q100 Grade 2 (−40 °C to +105 °C ambient temperature range), as documented in Infineon's product change notifications and qualification reports. This rating covers operation in under-hood automotive environments including engine control and transmission control applications.

Can the VCCE pin be used to configure mixed-voltage I/O operation on specific port groups?

Yes. The VCCE pin selects I/O voltage level (5 V or 3.3 V) for dedicated GPIO groups: P010–P017, P020–P027, and P030–P036 on the LQFP-144 package. This allows interfacing with both 5 V legacy sensors and 3.3 V digital ICs without external level shifters, as specified in Section 6 ("I/O Circuit Type") of the datasheet.

Is the built-in FPU IEEE754-compliant and what precision does it support?

Yes, the integrated FPU is fully IEEE754-compliant and supports single-precision (32-bit) floating-point arithmetic. It provides 16 × 32-bit floating-point registers and executes operations such as add, multiply, and divide in hardware-eliminating software emulation overhead for control law computation in motor and powertrain applications.