Infineon Technologies CY8C6347BZI-BLD54

Overview

CY8C6347BZI-BLD54 from Infineon is a dual-core Arm® Cortex®-M4F/M0+ microcontroller with integrated Bluetooth® 5.0 radio, 1-MB flash, 288-KB SRAM, and programmable analog/digital peripherals. It operates from 1.7–3.6 V, achieves 7 µA Deep Sleep current with 64-KB SRAM retention, and supports QSPI XIP with hardware encryption-targeted for secure, battery-powered IoT edge nodes requiring concurrent processing and wireless connectivity.

For engineers reviewing the CY8C6347BZI-BLD54 datasheet, CY8C6347BZI-BLD54 pinout, CY8C6347BZI-BLD54 application, or CY8C6347BZI-BLD54 equivalent, key selection considerations include dual-CPU power efficiency (22 µA/MHz @ 0.9 V on M4), Bluetooth LE link-layer concurrency (4 simultaneous connections), SAR ADC performance (12-bit, 1-Msps, 16-channel sequencer), and Smart I/O™ availability in Deep Sleep mode.

Technical Context

The device implements a tightly coupled dual-CPU subsystem where the Cortex-M4F handles real-time signal processing and security-critical tasks while the Cortex-M0+ manages Bluetooth LE protocol stack and low-power system orchestration. Inter-processor communication occurs via dedicated IPC channels with hardware semaphore support and shared memory regions protected by MPU.

Its Bluetooth LE subsystem integrates a 2.4-GHz RF transceiver with –95 dBm RX sensitivity, programmable TX output up to +4 dBm, and a hardware-accelerated Link Layer engine supporting master/slave roles and 2 Mbps PHY-enabling robust, low-latency wireless sensor networking without host CPU intervention.

Key Specifications

Pinout & Package

This device is packaged in a 124-ball BGA (9 × 9 mm, 0.5-mm pitch), designated as "BZI" per Infineon's package coding. The package supports USB functionality and includes dedicated RF matching pins, high-speed digital I/O banks, and separate analog/digital power domains.

Key Features

Applications

Equivalent & Alternatives

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

Compared with nRF52840 and DA1469x, CY8C6347BZI-BLD54 uniquely integrates programmable analog (SAR ADC, opamps, comparators), programmable digital (UDBs, Smart I/O™), and dual-CPU power management-enabling single-chip sensor fusion, UI control, and secure BLE connectivity without external support ICs.

Availability

CY8C6347BZI-BLD54 is available at Aetrix Electronics and suitable for wearable health monitors, smart home sensor hubs, industrial predictive maintenance nodes, and secure asset trackers requiring stable component supply, long-term lifecycle assurance, and qualified traceable sourcing.

Supply support for CY8C6347BZI-BLD54 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 connectivity solutions, with global R&D and manufacturing infrastructure.

CY8C6347BZI-BLD54 belongs to the PSoC™ 63 product line-designed specifically for ultra-low-power, secure, and sensor-rich IoT endpoints that demand integrated wireless, analog, and programmable logic in a single chip.

FAQ

Does CY8C6347BZI-BLD54 support USB device functionality?

Yes, it integrates a full-speed USB 2.0 device interface with on-chip PHY, endpoint buffers, and descriptor handling. It supports standard device classes including HID, CDC, and MSC without external transceivers. USB operation requires VBUS detection and is compatible with 3.3-V I/O signaling.

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

The Cortex-M4F core operates at up to 150 MHz, enabled by the on-chip PLL or FLL clock sources. Frequency stability is maintained across voltage (0.9–1.1 V) and temperature (–40°C to +85°C) ranges per datasheet specifications, with dynamic voltage/frequency scaling supported in firmware.

Can the SAR ADC perform continuous conversions without CPU intervention?

Yes-the 12-bit SAR ADC supports hardware-triggered, sequenced conversions with automatic channel scanning, result averaging, and DMA transfer. It can operate autonomously using timers or digital signals, storing results directly to SRAM while both CPUs remain in Deep Sleep mode.

Is the Bluetooth LE subsystem certified for regulatory compliance?

Yes, the integrated Bluetooth LE radio has completed FCC, IC, CE, and Telec certifications as part of the CY8C6347BZI-BLD54 module-level qualification. Certified RF parameters-including conducted output power, spurious emissions, and radiated performance-are documented in Infineon's official certification reports (e.g., FCC ID: 2AC7Z-CY8C6347).