Infineon Technologies CY8C6336LQI-BLF42

Overview

CY8C6336LQI-BLF42 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 V to 3.6 V, achieves 7 µA Deep Sleep current with 64-KB SRAM retention, and supports QSPI XIP with hardware encryption-designed for secure, battery-powered IoT edge nodes such as smart sensors and BLE gateways.

For engineers reviewing the CY8C6336LQI-BLF42 datasheet, CY8C6336LQI-BLF42 pinout, CY8C6336LQI-BLF42 application, or CY8C6336LQI-BLF42 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), SAR ADC performance (12-bit, 1-Msps, 16-channel sequencer), and SMIF throughput (up to 640 Mbps in octal mode).

Technical Context

The device implements a tightly coupled dual-CPU architecture where the Cortex-M4F handles real-time signal processing and security-critical tasks while the Cortex-M0+ manages low-power connectivity and peripheral orchestration via IPC and shared memory. Its Bluetooth subsystem integrates a 2.4-GHz RF transceiver, digital PHY, and hardware-accelerated Link Layer supporting master/slave roles and 2 Mbps data rate.

Clocking is managed through multiple sources: an 8-MHz IMO (±2%), 32-kHz ILO, external crystal oscillators (16–35 MHz + 32 kHz), FLL, and PLL-with integer/fractional dividers enabling precise peripheral clock tuning. Power management includes six modes, SIMO buck converter (<1 µA quiescent), and backup domain with RTC and 64-byte memory.

Key Specifications

Pinout & Package

The CY8C6336LQI-BLF42 is housed in a 104-ball Wafer-Level Chip-Scale Package (WLCSP) with 0.4-mm pitch and 3.2 mm × 3.2 mm footprint. Ball mapping follows JEDEC MO-220, with dedicated VDDIO, VDDD, VDDR, VBUS, and ground balls distributed across the periphery for noise isolation and thermal dissipation.

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, CY8C6336LQI-BLF42 uniquely combines dual-core deterministic partitioning, programmable analog/digital fabric, and full hardware crypto-including ECC and TRNG-for secure, sensor-rich, low-power edge devices requiring minimal BOM expansion.

Availability

CY8C6336LQI-BLF42 is available at Aetrix Electronics and suitable for smart wearables, industrial BLE gateways, secure asset trackers, and wireless medical patches requiring stable component supply, long-term lifecycle assurance, and qualified wafer-lot traceability.

Supply support for CY8C6336LQI-BLF42 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 leader specializing in power management, automotive MCUs, and secure connectivity solutions, with global manufacturing and R&D centers across Europe, Asia, and the Americas.

The PSoC™ 63 product line targets secure, ultra-low-power IoT endpoints-integrating Arm dual-core processing, Bluetooth LE 5.0, programmable analog/digital fabric, and hardware security to reduce system-level BOM count and firmware complexity.

FAQ

What is the maximum operating frequency of the Cortex-M4F core in CY8C6336LQI-BLF42?

The Cortex-M4F core operates at up to 150 MHz under 1.1-V core supply conditions. At reduced 0.9-V core voltage, maximum frequency is derated to maintain timing closure and power efficiency-verified in Infineon's characterization across process/voltage/temperature corners. This dual-voltage capability enables dynamic performance scaling without changing clock source or PLL configuration.

Does CY8C6336LQI-BLF42 support USB device functionality?

Yes, it integrates a full-speed (12 Mbps) USB 2.0 device interface compliant with USB Battery Charging Specification v1.2. The USB PHY connects directly to VBUS and D+/D− pins, supports descriptor-based enumeration, and can operate concurrently with BLE-enabling dual-mode connectivity for firmware updates and debug without disabling wireless operation.

How many GPIOs support overvoltage tolerance, and what is the rating?

Six GPIO pins (P0[0]–P0[5]) are overvoltage-tolerant up to 5.5 V, independent of VDDIO supply voltage. This allows direct interfacing with 5-V sensors, industrial buses, or legacy peripherals without external level shifters-verified per AEC-Q100 stress testing and documented in the Absolute Maximum Ratings table of the datasheet.

Is external flash required for QSPI XIP operation, and what interface modes are supported?

External quad SPI flash is required for Execute-In-Place (XIP) operation. The SMIF controller supports single, dual, quad, dual-quad, and octal I/O modes-with octal mode achieving up to 640 Mbps throughput. Hardware AES-128 decryption is applied transparently during fetch, and the 4-KB instruction cache minimizes latency for cached hot code regions.