Infineon Technologies CY8C6145FNI-S3F71T

Overview

CY8C6145FNI-S3F71T 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 acceleration, CAN FD, USB Full-Speed, and CAPSENSE™ capacitive sensing - enabling battery-powered smart sensors and industrial gateways operating from 1.7 V to 3.6 V with 7 µA Deep Sleep current.

For engineers reviewing the CY8C6145FNI-S3F71T datasheet, CY8C6145FNI-S3F71T pinout, CY8C6145FNI-S3F71T application, or CY8C6145FNI-S3F71T 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 hardware TRNG + eFuse-based secure boot.

Technical Context

The device implements a tightly coupled dual-CPU subsystem where the Cortex-M4F handles application processing at up to 150 MHz while the Cortex-M0+ (reserved for system functions) manages low-level peripherals and security services. Both cores operate at user-selectable 1.1 V or 0.9 V supply, enabling fine-grained dynamic voltage scaling.

Its programmable analog-digital architecture includes a 12-bit 2-Msps SAR ADC with 16-channel sequencer and averaging, two Deep Sleep-capable comparators, and a dedicated CAPSENSE™ sigma-delta CSD block supporting self/mutual sensing with SmartSense auto-tuning - all synchronized via hardware trigger routing and three DMA controllers.

Key Specifications

Pinout & Package

This device is packaged in a 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch) with 64 GPIOs, including two overvoltage-tolerant (OVT) pins and two Smart I/O ports (8 pins total) supporting Boolean logic in Deep Sleep mode.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C6145FNI-S3F71T, CY8C6247FMI-F54 offers greater memory headroom at higher cost and power, while STM32U585QII6 trades programmable analog/digital flexibility for stronger ARM TrustZone enforcement - making CY8C6145FNI-S3F71T optimal for cost-constrained, sensor-rich IoT endpoints needing hardware-accelerated security and ultra-low sleep current.

Availability

CY8C6145FNI-S3F71T is available at Aetrix Electronics and suitable for smart home sensor hubs, industrial predictive maintenance nodes, medical wearable patches, and secure access control terminals requiring stable component supply across multi-year production cycles.

Supply support for CY8C6145FNI-S3F71T 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 MCUs, and secure embedded solutions, with global R&D centers and ISO/TS 16949-certified manufacturing.

This part belongs to the PSOC™ 61 family - engineered specifically for secure, battery-operated IoT edge devices demanding simultaneous low-power operation, rich analog integration, and hardware-enforced trust boundaries.

FAQ

What is the maximum operating frequency of the Cortex-M4F core in CY8C6145FNI-S3F71T?

The Cortex-M4F core operates at up to 150 MHz under 1.1 V core supply, and maintains full functionality at 100 MHz when powered at 0.9 V for ultra-low-power operation. Frequency scaling is managed via the on-chip PLL and FLL, with integer/fractional clock dividers supporting precise peripheral timing alignment.

Does CY8C6145FNI-S3F71T support secure boot with public-key verification?

Yes - it performs authentication during boot using hardware-accelerated SHA-256 hashing of the boot image, validated against RSA-2048 or ECC-P256 signatures stored in protected flash or eFuse. Debug interfaces can be permanently disabled post-configuration to prevent unauthorized firmware extraction.

Can the CAPSENSE™ subsystem operate independently of the main CPU cores?

Yes - the CAPSENSE™ CSD hardware block runs autonomously using its own clock and sequencer, allowing touch scanning during Deep Sleep mode with only the ILO oscillator active. Results are placed directly into SRAM, and interrupts or DMA transfers wake the CPU only upon threshold crossing or completion.

Is external memory required to use the QSPI interface for code execution?

No - the QSPI/SMIF interface supports Execute-In-Place (XIP) directly from external quad-SPI flash, with a dedicated 4 KB cache to reduce latency and power consumption. On-the-fly AES-128 decryption is applied transparently to encrypted firmware images stored externally.