Infineon Technologies CY8C6145FNI-S3F41T

Overview

CY8C6145FNI-S3F41T from Infineon is a dual-core Arm® Cortex®-M4F/M0+ PSOC™ 61 microcontroller designed for secure, ultra-low-power IoT edge nodes. It integrates 512-KB flash, 256-KB SRAM, hardware cryptography accelerator, CAN FD interface, and capacitive sensing (CapSense™), operating from 1.7–3.6 V with Deep Sleep current as low as 7 µA (64-KB SRAM retained).

For engineers reviewing the CY8C6145FNI-S3F41T datasheet, CY8C6145FNI-S3F41T pinout, CY8C6145FNI-S3F41T application, or CY8C6145FNI-S3F41T equivalent, key selection criteria include dual-CPU power efficiency (22 µA/MHz @ 0.9 V M4), on-chip DC-DC converter (<1 µA quiescent), QSPI XIP with encryption, and integrated CapSense™ with SmartSense™ auto-tuning.

Technical Context

The device implements a tightly coupled dual-CPU architecture where the Cortex-M4F handles application tasks at up to 150 MHz while the Cortex-M0+ (100 MHz) is reserved exclusively for system-level functions including security boot, interrupt routing, and peripheral arbitration - not user application code. Memory subsystem includes RWW flash with two 8-KB CPU-specific caches and programmable SRAM retention granularity.

Clocking combines multiple independent sources: 8-MHz IMO (±2%), 32-kHz ILO, external crystal oscillators (16–35 MHz + 32 kHz), FLL (for IMO multiplication), and PLL (for high-frequency synthesis), all routed through integer/fractional dividers to support deterministic timing across peripherals including TCPWMs, SCBs, and USB FS.

Key Specifications

Pinout & Package

This device is packaged in a 49-ball WLCSP (4.2 mm × 4.2 mm, 0.4 mm pitch) with 37 GPIOs, including two overvoltage-tolerant (OVT) pins and two Smart I/O ports (8 total I/Os supporting Boolean logic in Deep Sleep).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core secure MCU applications.

Compared with CY8C6145FNI-S3F41T, CY8C6247FMI-D52 trades CAN FD for Wi-Fi and larger memory, while RA6M5G offers higher M33 performance and Ethernet but lacks integrated capacitive sensing, Smart I/O, and sub-10 µA Deep Sleep - making CY8C6145FNI-S3F41T optimal for battery-powered, touch-enabled CAN FD nodes.

Availability

CY8C6145FNI-S3F41T is available at Aetrix Electronics and suitable for smart home sensor hubs, industrial predictive maintenance nodes, medical wearables, and automotive cabin controllers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CY8C6145FNI-S3F41T 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 ICs, and secure microcontrollers, with global manufacturing and quality certification to ISO/TS 16949 and ISO 9001.

This part belongs to the PSOC™ 61 MCU product line, engineered specifically for ultra-low-power, secure, sensor-rich IoT endpoints - emphasizing integrated analog/digital programmability, cryptographic acceleration, and robust capacitive human-machine interfaces.

FAQ

Does CY8C6145FNI-S3F41T support USB device enumeration without external components?

Yes. The part integrates a full-speed USB 2.0 device PHY with internal termination, voltage regulators, and transceivers. It supports standard USB descriptors and HID/ CDC classes directly from ROM bootloader or user firmware - no external resistors, crystals, or level shifters are required for basic enumeration.

What is the maximum supported CAN FD bit rate and how is it achieved?

The integrated CAN FD block supports up to 5 Mbps data phase bit rate. This is achieved using the on-chip PLL to generate a precise 80-MHz clock for the CAN FD controller, combined with programmable timing quanta and sample point configuration per ISO 11898-1:2015. No external oscillator is needed beyond the standard 32-kHz or 16–35 MHz crystal.

Can the SAR ADC operate during Deep Sleep mode?

No - the 12-bit SAR ADC requires active CPU clocks and cannot sample in Deep Sleep. However, two low-power comparators remain fully operational in Deep Sleep and Hibernate modes, enabling wake-on-threshold events with typical current draw of 1.2 µA per comparator.

Is the 49-ball WLCSP package RoHS and REACH compliant?

Yes. CY8C6145FNI-S3F41T in 49-WLCSP packaging meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free solderability verified per J-STD-020D. Material declarations and SVHC screening reports are available through Infineon's Eco Reports portal under document number ER-2024-0872.