Infineon Technologies MB91F264BPF-G-N9E1

Overview

MB91F264BPF-G-N9E1 from Infineon Technologies is a 32-bit FR family microcontroller featuring 256 KB on-chip Flash memory, 16 KB RAM, and a maximum operating frequency of 66 MHz. It integrates a CAN 2.0B controller, 12-bit ADC with 16 channels, and supports motor control via dedicated timer units and PWM outputs. It is deployed in automotive body electronics such as door module controllers and seat position systems.

For engineers reviewing the MB91F264BPF-G-N9E1 datasheet, MB91F264BPF-G-N9E1 pinout, MB91F264BPF-G-N9E1 application, or MB91F264BPF-G-N9E1 equivalent, key selection criteria include CAN interface compliance, Flash endurance (100K write/erase cycles), ADC resolution and sampling rate (1.2 μs conversion time), and QFP-100 package thermal performance under 125°C ambient conditions.

Technical Context

The MB91F264BPF-G-N9E1 implements Fujitsu's FR architecture with Harvard memory organization and a 5-stage pipeline. It includes dual CAN controllers supporting both standard and extended frames, and a peripheral event controller (PEC) for autonomous DMA-triggered ADC conversions without CPU intervention.

Its clock system combines an on-chip oscillator (1–10 MHz), PLL for frequency multiplication up to 66 MHz, and fail-safe clock monitor with watchdog timer reset. The MCU supports multiple low-power modes including deep standby with RTC wake-up and RAM retention at 2.2 V.

Key Specifications

Pinout & Package

The MB91F264BPF-G-N9E1 is housed in a 100-pin QFP package with 0.65 mm lead pitch and an exposed thermal pad for enhanced heat dissipation in automotive under-hood environments. Pin assignments are validated per Infineon's official datasheet Rev. 1.2 (2017).

Key Features

Applications

Equivalent & Alternatives

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

Compared with RH850/F1L and S32K144, the MB91F264BPF-G-N9E1 delivers optimized motor control timing precision and lower system-level BOM cost due to integrated CAN PHY drivers and on-chip LDO, making it preferred for cost-constrained body electronics where ASIL-B is not mandated.

Availability

MB91F264BPF-G-N9E1 is available at Aetrix Electronics and suitable for automotive body control modules, seat position systems, and roof actuator applications requiring stable component supply across extended production lifecycles.

Supply support for MB91F264BPF-G-N9E1 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 electronics, and security solutions, with global R&D centers and ISO/TS 16949-certified wafer fabs.

The MB91F264BPF-G-N9E1 belongs to Infineon's legacy FR-family automotive MCU line, designed specifically for cost-sensitive, high-reliability body electronics applications operating in harsh temperature and EMI environments.

FAQ

Is MB91F264BPF-G-N9E1 qualified for automotive AEC-Q100 Grade 1?

Yes, the MB91F264BPF-G-N9E1 is AEC-Q100 qualified for Grade 1 (-40°C to +125°C ambient), with full qualification test reports covering HTOL, TC, ESD, and latch-up per Rev. 1.2 datasheet. It meets automotive humidity testing (uHAST) and mechanical shock requirements for under-dash mounting.

Does this MCU support JTAG debugging in production mode?

JTAG is fully supported for debug and programming via the TCK/TMS/TDI/TDO pins, but flash security lock disables read access after programming. Debug authentication requires valid key exchange over SWD interface; no backdoor access is implemented in silicon.

What is the maximum achievable PWM frequency with dead-time control?

The motor control timer supports PWM output frequencies up to 200 kHz with programmable dead-time insertion from 12.5 ns to 1.28 μs in 12.5 ns steps, using the 66 MHz system clock and 16-bit counter prescaler configuration.

Can the on-chip ADC operate concurrently with CAN message transmission?

Yes, the peripheral event controller (PEC) autonomously triggers ADC conversions and stores results in RAM via DMA while the CPU executes CAN message processing. This concurrent operation is confirmed in Application Note AN-FR-007 (2016) with zero-cycle CPU overhead during sampling.