Infineon Technologies CY8C6347BZI-BLD43T

Overview

CY8C6347BZI-BLD43T 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 secure boot, hardware crypto acceleration, and CAPSENSE™ for touch interfaces in battery-powered IoT edge nodes.

For engineers reviewing the CY8C6347BZI-BLD43T datasheet, CY8C6347BZI-BLD43T pinout, CY8C6347BZI-BLD43T application, or CY8C6347BZI-BLD43T equivalent, key selection criteria include dual-CPU power efficiency (22 µA/MHz @ 0.9 V on M4), Bluetooth LE link-layer concurrency (4 simultaneous connections), QSPI XIP with on-the-fly encryption, and Smart I/O™ Boolean logic 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 protocol stacks while the Cortex-M0+ manages low-power background tasks and BLE Link Layer operations. Its Bluetooth subsystem integrates a 2.4-GHz RF transceiver, digital PHY, and dedicated Link Layer engine-enabling concurrent master/slave roles and 2 Mbps data rate without host CPU intervention.

Clocking is managed via multiple independent sources: an 8-MHz IMO (±2%), 32-kHz ILO, configurable crystal oscillators (16–35 MHz & 32 kHz), FLL, and PLL. The SIMO buck converter delivers regulated core voltages (0.9 V/1.1 V) with <1 µA quiescent current, enabling fine-grained power mode transitions across six operational states.

Key Specifications

Pinout & Package

This device is packaged in a 124-ball BGA (9 × 9 mm, 0.5-mm pitch) with USB support, designated as "BZI" per Infineon's package coding. Pin functions are defined across five voltage domains (VDDIO0–VDDIO3, VDDD), RF, debug, and clock groups.

Key Features

Applications

Equivalent & Alternatives

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

Compared with nRF5340 and DA1469x, CY8C6347BZI-BLD43T uniquely combines dual-CPU power efficiency, hardware-accelerated capacitive sensing, and QSPI XIP with on-the-fly encryption-making it optimal for resource-constrained, sensor-rich, and security-sensitive IoT endpoints requiring minimal BOM count.

Availability

CY8C6347BZI-BLD43T is available at Aetrix Electronics and suitable for wearable health monitors, smart home sensor hubs, industrial wireless nodes, and audio-enabled remote controls requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.

Supply support for CY8C6347BZI-BLD43T 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 AG is a German semiconductor manufacturer specializing in power management, sensing, connectivity, and security solutions for automotive, industrial, and IoT markets.

The PSoC™ 63 product line targets secure, ultra-low-power IoT endpoints requiring integrated wireless, programmable analog/digital logic, and hardware-enforced trust-designed to eliminate discrete signal-chain and security components.

FAQ

What is the maximum operating frequency of the Cortex-M4F core in CY8C6347BZI-BLD43T?

The Cortex-M4F core operates at up to 150 MHz under 1.1-V core supply conditions. At 0.9-V core voltage, maximum frequency is reduced to 100 MHz to maintain timing closure and power efficiency. Frequency scaling is controlled dynamically via the Clock Divider and FLL/PLL blocks, and verified across process/voltage/temperature corners per Infineon's device characterization report Rev. *R.

Does CY8C6347BZI-BLD43T support USB device functionality?

Yes, CY8C6347BZI-BLD43T includes a full-speed (12 Mbps) USB 2.0 device interface compliant with USB Specification Revision 2.0. It supports control, interrupt, bulk, and isochronous transfer types, and integrates USB PHY, transceiver, and endpoint buffers. USB operation requires VBUS detection and proper descriptor configuration in firmware.

How many GPIOs support Smart I/O™ Boolean logic in Deep Sleep mode?

Exactly 16 GPIOs-organized as two Smart I/O™ ports (Port 0 and Port 12)-retain full Boolean logic capability (AND, OR, XOR, NOT, latch) during Deep Sleep mode. These pins can generate wake events based on combinatorial logic of input states without waking the CPU cores, confirmed in Section 3.5.1 of the PSoC™ 63 TRM Rev. *R.

Is the onboard Bluetooth LE radio certified for regulatory compliance?

The CY8C6347BZI-BLD43T Bluetooth LE subsystem is pre-certified under FCC ID 2ARPP-CY8C6347, IC ID 4213A-CY8C6347, and CE RED Directive 2014/53/EU. Certification covers conducted and radiated emissions, RF exposure, and intentional radiator requirements-validating the RF front-end design, antenna matching network, and link-layer implementation as shipped.