Infineon Technologies CY90F351SPFM-GSE1

Overview

CY90F351SPFM-GSE1 from Cypress Semiconductor (acquired Fujitsu Microelectronics) is a 16-bit F2MC-16LX microcontroller with integrated FULL-CAN 2.0A/B interface, 64 KB Flash ROM, 4 KB RAM, and LQFP-64 package. It delivers 42 ns instruction execution time at 24 MHz PLL clock, supports automotive-grade operation from −40 °C to +105 °C, and features 15-channel 8/10-bit ADC, dual 16-bit freerun timers, and 2-channel UART - deployed in engine control units and body electronics modules.

For engineers reviewing the CY90F351SPFM-GSE1 datasheet, CY90F351SPFM-GSE1 pinout, CY90F351SPFM-GSE1 application, or CY90F351SPFM-GSE1 equivalent, key selection criteria include CAN message buffer flexibility (16 mailbox/FIFO configurable), sub-clock support via internal 100 kHz CR oscillator (S-suffix variant), flash security function, and compatibility with MB90F351S-series development tools and emulator MB2147-01.

Technical Context

The CY90F351SPFM-GSE1 implements the F2MC-16LX CPU core with 24-bit internal addressing and 16 MB memory space, executing instructions from on-chip Flash with 4-byte instruction queue and 32-bit accumulator for high-precision math. Its PLL supports ×1–×6 multiplication of external 4 MHz clock, enabling 42 ns min instruction cycle and independent main/sub clock monitoring.

Peripheral integration includes a 1-channel FULL-CAN controller compliant with ISO 11898-1:2003, supporting up to 1 Mbps, automatic retransmission, remote frame response, and flexible acceptance filtering (full-bit compare/mask or dual partial masks). The 15-channel ADC achieves 3 µs conversion time at 24 MHz machine clock with external trigger activation and selectable 8-/10-bit resolution.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (10 mm × 10 mm, 0.50 mm pitch, FPT-64P-M24), RoHS-compliant, surface-mountable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MB90F351S and MB90F351A, CY90F351SPFM-GSE1 provides identical real-time control capability and CAN functionality but is optimized for Cypress's post-acquisition logistics and extended lifecycle support - making it ideal for long-term production continuity without design change.

Availability

CY90F351SPFM-GSE1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and industrial CAN gateways requiring stable component supply across automotive Tier-1 and industrial OEM programs.

Supply support for CY90F351SPFM-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 since 2020) is a global leader in embedded solutions, specializing in microcontrollers, connectivity, and memory technologies for automotive, industrial, and IoT markets.

CY90F351SPFM-GSE1 belongs to the MB90350 Series product line, designed specifically for cost-sensitive, high-reliability automotive applications demanding integrated CAN, deterministic real-time performance, and extended temperature operation.

FAQ

Is CY90F351SPFM-GSE1 pin-compatible with MB90F351S?

Yes - CY90F351SPFM-GSE1 shares identical LQFP-64 mechanical footprint, electrical pinout, and peripheral register mapping with MB90F351S. All 64 pins retain the same circuit roles including CAN, UART, ADC, and timer I/O. No PCB redesign or firmware modification is needed for drop-in replacement in existing MB90F351S designs.

Does CY90F351SPFM-GSE1 support CAN FD?

No - CY90F351SPFM-GSE1 implements only classical FULL-CAN per ISO 11898-1:2003 (CAN 2.0A/B), supporting up to 1 Mbps. It does not include CAN FD features such as variable bit rate, extended data length (up to 64 bytes), or CRC enhancements. For CAN FD, consider Infineon's AURIX™ TC3xx series.

What is the maximum operating frequency at 125 °C?

At TA = +125 °C, CY90F351SPFM-GSE1 is rated for maximum 16 MHz machine clock operation. This limitation applies regardless of PLL multiplier setting; the 24 MHz max frequency is only guaranteed up to +105 °C ambient. Derating is enforced by internal thermal protection logic to ensure silicon reliability.

Can the internal 100 kHz CR oscillator be used as system clock source?

No - the internal 100 kHz CR oscillator is designated exclusively as sub-clock source for watch timer and stop mode operation. System clock must derive from external crystal (4 MHz) multiplied by PLL (×1–×6) or direct external clock input. Sub-clock cannot drive CPU execution or peripheral clocks.