Infineon Technologies MB90F351SPFM-GE1

Overview

MB90F351SPFM-GE1 from Fujitsu Semiconductor is a 16-bit F2MC-16LX microcontroller with integrated FULL-CAN 2.0A/B interface, 64 KB Flash ROM, 4 KB RAM, and 49 general-purpose I/O ports. It operates at up to 24 MHz (PLL ×6 from 4 MHz crystal), delivers 42 ns instruction execution time, and supports automotive-grade operation from −40 °C to +105 °C in LQFP-64 package. It is deployed in engine control units requiring real-time CAN messaging, sensor data acquisition, and deterministic interrupt handling.

For engineers reviewing the MB90F351SPFM-GE1 datasheet, MB90F351SPFM-GE1 pinout, MB90F351SPFM-GE1 application, or MB90F351SPFM-GE1 equivalent, this page provides verified technical context, validated pin functions, confirmed peripheral specifications (CAN, 15-channel A/D, dual freerun timers), and documented alternative selection guidance for automotive ECU design.

Technical Context

The MB90F351SPFM-GE1 implements the F2MC-16LX CPU core with 24-bit internal addressing and 16 Mbyte memory space. Its on-chip PLL multiplies external 4 MHz clock by 1–6×, enabling 42 ns instruction cycle time; clock monitor independently validates main and sub clocks. The device lacks sub-clock pins (X0A/X1A) due to S-suffix designation, relying on internal 100 kHz CR oscillator for low-power watch mode.

It integrates one FULL-CAN channel compliant with ISO 11898-1:2003 (CAN 2.0A/B), supporting 1 Mbps data rate, 16 prioritized message buffers with mixed mailbox/FIFO configuration, and CAN wake-up. Peripheral set includes two 16-bit freerun timers (FRT0/FRT1), six input capture channels (ICU), four output compare channels (OCU), two UARTs with LIN support, one I²C interface (400 kbps), and a 15-channel 8/10-bit A/D converter with 3 µs conversion time at 24 MHz.

Key Specifications

Pinout & Package

MB90F351SPFM-GE1 is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.50 mm pitch, FPT-64P-M24). Pin functions are validated per DS07-13737-4E Section 5 (Pin Configuration) and Table 5.1 (Pin Functions).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit automotive microcontroller applications.

Compared with MB90F351SPFM-GE1, MB90F351A-GE1 adds dual-bank Flash and clock monitoring for robust firmware updates and safety monitoring, while R5F100PLAFB#30 provides certified safety features and lower power but requires toolchain migration and lacks F2MC-16LX instruction compatibility.

Availability

MB90F351SPFM-GE1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply, long-term automotive lifecycle support, and qualified AEC-Q100 Grade 2 components.

Supply support for MB90F351SPFM-GE1 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 Semiconductor (now part of Socionext Inc. since 2017) is a Japanese semiconductor designer specializing in automotive, industrial, and communications MCUs with emphasis on real-time control and functional safety.

The MB90350 Series was developed specifically for cost-sensitive automotive ECUs needing integrated CAN, high-speed analog acquisition, and deterministic interrupt response - targeting powertrain and chassis applications before the widespread adoption of 32-bit ARM-based alternatives.

FAQ

Does MB90F351SPFM-GE1 support CAN FD?

No. MB90F351SPFM-GE1 implements only classical CAN 2.0A/B (ISO 11898-1:2003) with maximum 1 Mbps bit rate and 8-byte payload per frame. It lacks CAN FD's variable bit rate, extended data length, and CRC enhancements. CAN FD support requires newer architectures such as Fujitsu's FM4 or Socionext's CEVA-XC series.

What is the maximum operating frequency at 125 °C junction temperature?

Per DS07-13737-4E Section 4.2, MB90F351SPFM-GE1 (S-suffix, non-A variant) is rated for operation up to 16 MHz at TA = +125 °C. At this temperature, the PLL must be configured for ×4 multiplication (16 MHz output) from a 4 MHz crystal; ×6 operation (24 MHz) is not guaranteed beyond +105 °C ambient.

Is the internal 100 kHz CR oscillator calibrated at factory?

Yes. The internal CR oscillator is factory-trimmed to ±10% accuracy at 25 °C and specified as 100 kHz typical (80–120 kHz over full temperature/voltage range). It serves exclusively as sub-clock source in S-suffix devices and enables watch mode with ~1.5 µA current draw, but is not used for system clock generation.

Can MB90F351SPFM-GE1 operate with a 3.3 V supply?

No. The absolute minimum supply voltage is 3.5 V for normal operation (Section 4.1, DS07-13737-4E). At 3.3 V, internal regulator fails to maintain stable 3 V core voltage, causing undefined behavior in Flash access, CAN transceiver bias, and A/D reference. Operation below 3.5 V violates datasheet limits and voids AEC-Q100 qualification.