Infineon Technologies CY7C64315-16LKXCT

Overview

CY7C64315-16LKXCT from Infineon Technologies (formerly Cypress Semiconductor) is a full-speed USB 2.0 microcontroller with an integrated M8C Harvard-architecture CPU, 16 KB flash, 2048 bytes SRAM, and on-chip USB transceiver. It operates at up to 24 MHz, supports 3.15–3.45 V or 4.35–5.25 V USB-enabled supply, and delivers eight unidirectional + one bidirectional USB endpoints for HID, mass storage, or custom peripheral designs.

For engineers reviewing the CY7C64315-16LKXCT datasheet, CY7C64315-16LKXCT pinout, CY7C64315-16LKXCT application, or CY7C64315-16LKXCT equivalent, key selection criteria include USB 2.0 TID# 40000893 compliance, crystal-less operation with ±0.25% IMO accuracy locked to USB data, hot-swappable Port 1 I/O, 10-bit ADC with temperature sensor integration, and configurable I²C/SPI peripherals supporting sleep-mode operation below 100 µA.

Technical Context

The device implements a dedicated Serial Interface Engine (SIE) that autonomously handles USB packet encoding/decoding, CRC generation/checking, address filtering, and ACK/NAK/Stall handshaking-reducing firmware overhead. Its 512-byte dedicated USB SRAM is managed via the PSoC Memory Arbiter (PMA), enabling zero-wait-state buffer access during high-throughput transfers.

System clocking uses an internal main oscillator (IMO) with programmable 6/12/24 MHz outputs; USB operation requires 24 MHz system clock, with IMO accuracy tightened to ±0.25% via automatic lock to USB data stream-eliminating external crystal. The M8C core executes at four MIPS, with interrupt controller, watchdog, and sleep timers tightly coupled to low-power modes.

Key Specifications

Pinout & Package

Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), lead-free, RoHS-compliant. Thermal pad exposed on underside for enhanced heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CP2102N-A02-GM and STM32F072CBT6, CY7C64315-16LKXCT uniquely combines certified USB 2.0 compliance, crystal-less operation, hot-swappable I/O, and integrated temperature-aware ADC in a compact 48-QFN package-ideal for cost-sensitive, space-constrained USB peripherals where firmware programmability and analog sensing coexist.

Availability

CY7C64315-16LKXCT is available at Aetrix Electronics and suitable for USB HID peripherals, industrial sensor nodes, programmable dongles, and legacy interface adapters requiring stable component supply and long-term lifecycle support.

Supply support for CY7C64315-16LKXCT 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 security solutions-with broad industrial and consumer portfolio reach.

This device belongs to the enCoRe™ V family, designed specifically to replace discrete USB interface components with a single, low-cost, programmable full-speed USB microcontroller-targeting HID, sensor, and adapter applications where integration, certification, and ease of development are critical.

FAQ

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

No. The device uses an internal main oscillator (IMO) that automatically locks to the USB data stream, achieving ±0.25% accuracy without any external crystal or resonator. External timing components are optional and only used if higher precision or non-USB system clocking is required.

What is the maximum sink current capability of Port 1 pins?

Each Port 1 pin supports up to 25 mA sink current. The total sink current across all Port 1 pins is limited to 60 mA. This rating applies under hot-swappable conditions with the internal LDO configured for 1.8 V, 2.5 V, or 3.0 V output-ensuring safe live-insertion into powered USB hosts.

Can the 10-bit ADC measure external voltages independently of the temperature sensor?

Yes. The ADC input can be routed via the analog multiplexer to either the integrated temperature sensor diodes or an external analog signal on designated pins (e.g., P0[0]–P0[3]). When configured for external measurement, the input range is 0 V to VREFADC, and resolution is selectable via firmware-controlled integration cycles.

Is CY7C64315-16LKXCT supported by current development tools?

Yes. Although PSoC Designer™ is legacy software, Infineon provides maintained toolchains including ModusToolbox™ SDK extensions and community-supported GCC-based build environments. USB descriptor configuration, firmware debugging, and ISSP programming remain fully functional through standard CMSIS-DAP debug probes and Infineon's USB-Serial Bridge utilities.