Infineon Technologies MB95F656EPF-G-SNE2

Overview

MB95F656EPF-G-SNE2 from Cypress Semiconductor is an 8-bit F2MC-8FX microcontroller with 36 KB Flash, 1024 bytes RAM, 21 I/O ports (17 CMOS + 4 N-ch open-drain), dual-bank Flash for concurrent read/erase, and integrated LIN-UART, I²C, UART/SIO, 8/16-bit composite timers, and 8/12-bit ADC across 6 channels. It operates at up to 16.25 MHz machine clock and supports four low-power standby modes - used in automotive body control modules requiring secure firmware updates and real-time sensor interfacing.

For engineers reviewing the MB95F656EPF-G-SNE2 datasheet, MB95F656EPF-G-SNE2 pinout, MB95F656EPF-G-SNE2 application, or MB95F656EPF-G-SNE2 equivalent, key selection criteria include Flash security features, dual-operation Flash architecture, LIN master/slave capability, sub-CR clock-based watchdog timing, and N-ch open-drain I/O for direct LED/relay drive without external pull-ups.

Technical Context

The MB95F656EPF-G-SNE2 implements the F2MC-8FX CPU core with 136 basic instructions, 1–3 byte instruction length, and 61.5 ns minimum execution time at 16.25 MHz. It integrates a clock supervisor counter monitoring both main and subclock oscillation stability, plus hardware/software watchdog timers with selectable clock sources including sub-CR (50–150 kHz).

Its memory subsystem includes 36 KB dual-bank Flash enabling background programming, Flash security lock to prevent unauthorized readout, and 1024-byte RAM. Peripheral integration includes two I²C channels (one shareable with UART/SIO), full-duplex double-buffered LIN-UART supporting NRZ format and LSB/MSB-first transfer, and 8/16-bit composite timers configurable as PWM, input capture, or interval timer with seven internal clock options.

Key Specifications

Pinout & Package

MB95F656EPF-G-SNE2 is housed in a 24-pin FPT (Fine Pitch TSSOP) package, 4.4 mm × 6.5 mm, 0.5 mm pitch, with exposed thermal pad (M10 variant). Pin functions are validated per Cypress Document 002-04696 Rev. *B, Pages 8–12.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with CY8C20466-24LTXI and MB95F654EPF-G-SNE2, the MB95F656EPF-G-SNE2 uniquely combines LIN-UART, dual-bank Flash, and N-ch open-drain I/O in a 24-pin TSSOP - making it optimal for automotive body electronics requiring secure, upgradable, and directly drivable I/O without external level-shifting components.

Availability

MB95F656EPF-G-SNE2 is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor nodes, smart appliance motor controllers, and medical diagnostic handsets requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MB95F656EPF-G-SNE2 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 embedded solutions for automotive, industrial, and medical markets, emphasizing security, low-power operation, and system-level integration.

The MB95650L Series targets cost-sensitive, functionally safe 8-bit control applications - delivering LIN-compliant communication, Flash security, and multi-mode power management for entry-level ECUs and portable diagnostics equipment.

FAQ

Does MB95F656EPF-G-SNE2 support in-circuit debugging via SWD or JTAG?

No. It uses a proprietary 1-wire serial debug interface requiring Cypress-specific programming tools (e.g., MiniProg3 with appropriate adapter). SWD and JTAG are not implemented; debug access relies on dedicated serial wire (SWDIO-equivalent pin) and asynchronous serial programming mode.

What is the maximum operating ambient temperature for continuous operation?

The device is rated for industrial temperature range: –40 °C to +85 °C. Electrical characteristics including Flash write endurance (100,000 cycles) and ADC accuracy are guaranteed across this full range per Document 002-04696 Rev. *B, Section 18.

Can the LIN-UART operate simultaneously with I²C on shared pins?

No. Pin P60/P61 are dedicated to LIN-UART; I²C channels use Port 1 (P10–P13) and Port F (PF0–PF1). The UART/SIO channel (shared with one I²C) is separate from LIN-UART and cannot be active concurrently with either I²C channel on its assigned pins.

Is the Flash security feature reversible after locking?

No. Once Flash security is enabled via the security lock bit, it permanently disables readout and serial programming. Unlocking requires full chip erase - which clears all user code and configuration bits. This irreversible behavior complies with ISO 26262 ASIL-B functional safety requirements for ECU firmware protection.