Infineon Technologies CY7C64315-16LKXIT

Overview

CY7C64315-16LKXIT 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 crystal-less USB timing with ±0.25% accuracy locked to USB data, and delivers configurable I/O with hot-swappable capability on Port 1 - used in USB HID peripherals like industrial keypads and programmable USB dongles.

For engineers reviewing the CY7C64315-16LKXIT datasheet, CY7C64315-16LKXIT pinout, CY7C64315-16LKXIT application, or CY7C64315-16LKXIT equivalent, key selection criteria include USB 2.0 TID# 40000893 compliance, 3.15–3.45 V USB-enabled operation, 8 unidirectional + 1 bidirectional endpoint support, and programmable LDO output (1.8/2.5/3.0 V) on Port 1.

Technical Context

The device integrates a 24-MHz-capable M8C core with Harvard architecture, enabling concurrent instruction/data fetches and deterministic interrupt latency critical for real-time USB packet handling. Its Serial Interface Engine (SIE) offloads USB protocol tasks - CRC generation/checking, address filtering, ACK/NAK handshaking, and SOF frame counting - without firmware intervention.

System-level resources include a 10-bit ADC with temperature sensor integration, dual-mode SPI (master/slave) configurable from 46.9 kHz to 12 MHz, I²C slave supporting 50/100/400 kHz with hardware address detection, and three 16-bit timers - all accessible via memory-mapped registers and coordinated through the PSoC Memory Arbiter (PMA).

Key Specifications

Pinout & Package

Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), thermally enhanced with exposed pad - optimized for compact USB peripheral designs requiring low thermal resistance and minimal PCB footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SLAB8051F32GQ and STM32F072CBT6, CY7C64315-16LKXIT uniquely combines crystal-less USB timing, hot-swappable Port 1, and programmable LDO - delivering lowest BOM count and highest I/O flexibility for compact, field-serviceable USB peripherals.

Availability

CY7C64315-16LKXIT is available at Aetrix Electronics and suitable for industrial keypads, USB HID game controllers, and programmable USB dongles requiring stable component supply across extended product lifecycles.

Supply support for CY7C64315-16LKXIT 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 systems, automotive MCUs, and secure connectivity solutions.

This device belongs to the enCoRe™ V family - designed specifically to replace multi-chip USB peripheral systems with single-chip, low-cost, field-programmable solutions for HID, consumer, and industrial USB endpoints.

FAQ

Does CY7C64315-16LKXIT require an external crystal for USB operation?

No. The device uses an internal main oscillator (IMO) that locks to USB data stream timing with ±0.25% accuracy, eliminating need for external crystal or resonator. External crystal (XIN/XOUT) is optional and only required if higher frequency stability is needed outside USB context.

What is the maximum sink current capability per GPIO on Port 1?

Each GPIO on Port 1 supports up to 25 mA sink current. Total sink current is limited to 60 mA across even-numbered pins and 60 mA across odd-numbered pins - i.e., 120 mA aggregate across all Port 1 pins, with simultaneous operation constrained by per-group limits.

Can the 10-bit ADC measure external voltages without external components?

Yes. When configured to use the analog mux bus instead of the default temperature sensor, the ADC accepts external input voltages from 0 V to VREFADC (typically VDD). No external op-amp or conditioning circuit is required for basic voltage monitoring applications like battery level sensing.

How does the hot-swappable feature on Port 1 work electrically?

Port 1 pins incorporate internal ESD protection and slew-rate control that tolerate live insertion/removal under power. The I/O structure isolates floating inputs during transition and prevents latch-up when voltage rails are applied asynchronously - validated per JEDEC JESD78 Class II requirements for hot-plug reliability.