Infineon Technologies CY7C64315-16LKXI

Overview

CY7C64315-16LKXI from Infineon Technologies (formerly Cypress Semiconductor) is a full-speed USB 2.0 microcontroller with an integrated M8C Harvard-architecture CPU, 32 KB flash, 2048 bytes SRAM, and dedicated 512-byte USB buffer. It operates at up to 24 MHz, supports 3.15–3.45 V or 4.35–5.25 V USB-supplied operation, and delivers eight unidirectional + one bidirectional USB endpoint for HID, mass storage, or custom peripheral applications.

For engineers reviewing the CY7C64315-16LKXI datasheet, CY7C64315-16LKXI pinout, CY7C64315-16LKXI application, or CY7C64315-16LKXI equivalent, key selection criteria include USB 2.0 TID# 40000893 compliance, crystal-less oscillator lock accuracy (±0.25% with USB data), hot-swappable Port 1 I/O, 10-bit ADC with temperature sensor integration, and configurable 36-GPIO drive modes including 25 mA sink per pin.

Technical Context

The CY7C64315-16LKXI implements a dedicated USB Serial Interface Engine (SIE) that autonomously handles CRC generation/checking, address filtering, ACK/NAK/Stall handshaking, and SOF frame counting-reducing firmware overhead. Its M8C core runs at up to 24 MHz with four-MIPS throughput and supports dynamic clock scaling during USB operation, where system clock must be locked to 24 MHz for full 12 Mbps throughput.

System resources include hardware-accelerated I²C slave (50/100/400 kHz, no clock stretching, sleep-mode active <100 µA), SPI master/slave (46.9 kHz–12 MHz), three 16-bit timers, and a temperature-sensor-coupled 10-bit ADC with integrator-based architecture and programmable conversion cycles. The internal main oscillator (IMO) achieves ±0.25% accuracy via USB data lock without external crystal.

Key Specifications

Pinout & Package

Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), lead-free, RoHS-compliant, thermal pad exposed.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar full-speed USB microcontroller applications.

Compared with STM32F072CBT6 and FT232HL, the CY7C64315-16LKXI uniquely combines crystal-less USB 2.0 compliance, hot-swappable I/O, integrated SIE, and temperature-aware ADC in a single 48-pin QFN-enabling compact, low-BOM, firmware-defined USB peripherals without external timing or level-shifting components.

Availability

CY7C64315-16LKXI is available at Aetrix Electronics and suitable for USB HID devices, industrial sensor nodes, programmable dongles, and embedded configuration tools requiring stable component supply across automotive-grade temperature ranges (–40 °C to +85 °C).

Supply support for CY7C64315-16LKXI 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, sensing, connectivity, and microcontroller solutions for industrial, automotive, and IoT applications.

The enCoRe™ V product line-originally developed by Cypress and now part of Infineon's USB microcontroller portfolio-is engineered for cost-sensitive, space-constrained USB peripheral designs requiring zero-external-component operation, robust hot-swap capability, and integrated analog sensing.

FAQ

What USB speed and compliance level does CY7C64315-16LKXI support?

CY7C64315-16LKXI supports USB 2.0 Full-Speed operation at 12 Mbps and is certified under USB-IF Test ID TID# 40000893. It implements a complete hardware Serial Interface Engine (SIE) that handles packet encoding/decoding, CRC, handshaking, and endpoint buffering without CPU intervention. No external PHY or crystal is required due to its crystal-less oscillator with USB-data-locked ±0.25% accuracy.

Does CY7C64315-16LKXI support in-system programming and debug?

Yes. The device supports In-System Serial Programming (ISSP) using Cypress's free PSoC Designer™ software and compatible programmers. It includes full-speed in-circuit emulation with complex breakpoint structure and 128-KB trace memory. Debug access is provided via dedicated SWD-like pins (not SWD protocol), enabling real-time code execution analysis, register inspection, and flash reprogramming without removing the IC from the board.

Can CY7C64315-16LKXI operate without an external crystal?

Yes. The device features an internal Main Oscillator (IMO) that locks to USB data stream for ±0.25% accuracy-eliminating need for external crystal or resonator. An optional external crystal (1–24 MHz) may be used via XIN/XOUT pins, but is unnecessary for USB operation. The IMO also provides selectable 6/12/24 MHz outputs, and a separate 32 kHz Internal Low-Speed Oscillator (ILO) supports watchdog and sleep functions.

What are the GPIO capabilities of Port 1 on CY7C64315-16LKXI?

Port 1 (P1[0]–P1[7]) supports hot-swappable operation with programmable LDO output (3.0 V, 2.5 V, or 1.8 V), configurable input voltage thresholds, and CMOS/totem-pole drive modes. Each pin delivers up to 25 mA sink current, with 60 mA total sink limit per even/odd port group. This enables direct connection to LEDs, switches, or level-sensitive peripherals without external regulators or translators-critical for plug-and-play USB accessories.