Infineon Technologies CY7C64315-16LKXC

Overview

CY7C64315-16LKXC from Infineon Technologies (formerly Cypress Semiconductor) is a full-speed USB 2.0 microcontroller with an M8C Harvard-architecture CPU running up to 24 MHz, 32 KB flash, 2048 bytes SRAM, and integrated USB transceiver supporting eight unidirectional + one bidirectional endpoint. It operates at 3.15–3.45 V (3.3 V supply) or 4.35–5.25 V (5 V supply), features crystal-less USB clocking with ±0.25% accuracy locked to USB data, and targets embedded USB peripheral designs such as HID devices and industrial dongles.

For engineers reviewing the CY7C64315-16LKXC datasheet, CY7C64315-16LKXC pinout, CY7C64315-16LKXC application, or CY7C64315-16LKXC equivalent, key selection criteria include USB 2.0 TID# 40000893 compliance, hot-swappable Port 1 I/O with programmable LDO (1.8/2.5/3.0 V), 10-bit ADC for battery monitoring, and ISSP in-system serial programming capability.

Technical Context

The CY7C64315-16LKXC 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 executes at up to 24 MHz with four-MIPS throughput, and system clock must be fixed at 24 MHz during USB operation to sustain 12 Mbps full-speed transfer.

On-chip resources include a configurable 10-bit ADC with temperature sensor integration, hardware 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 precision internal main oscillator (IMO) with ±0.25% USB-lock accuracy-eliminating need for external crystal in USB applications.

Key Specifications

Pinout & Package

CY7C64315-16LKXC is housed in a 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are validated per Cypress document 001-12394 Rev. *V (pages 11–12).

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 STM32F072CB, CY7C64315-16LKXC uniquely balances USB protocol offload, programmability, and crystal-less simplicity - making it optimal for cost-sensitive, fixed-function USB peripherals where rapid time-to-market and minimal BOM count are critical.

Availability

CY7C64315-16LKXC is available at Aetrix Electronics and suitable for USB HID devices, industrial dongles, battery monitors, and embedded configuration tools requiring stable component supply and long-term manufacturing continuity.

Supply support for CY7C64315-16LKXC 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 ICs, and secure connectivity solutions.

The enCoRe™ V product line was originally developed by Cypress Semiconductor and continues under Infineon's portfolio to serve cost-optimized, single-chip USB peripheral applications - emphasizing ease of certification, low-system-cost integration, and field-upgradable firmware.

FAQ

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

No. The device uses an internal main oscillator (IMO) with ±0.25% accuracy locked to the USB data stream, eliminating the need for an external 12 MHz crystal. External crystal pins (XIN/XOUT) are optional and only required if higher timing precision is needed for non-USB functions.

What is the maximum sink/source current capability per GPIO on CY7C64315-16LKXC?

Each GPIO supports 25 mA sink current. Total sink current is limited to 60 mA on even-port pins and 60 mA on odd-port pins (120 mA combined). Source current is –5 mA on Ports 0–1 and –1 mA on Ports 2–4, with a total source limit of 20 mA across all ports.

Can CY7C64315-16LKXC operate in deep-sleep mode while maintaining I²C slave responsiveness?

Yes. The I²C slave remains fully functional in sleep mode with typical current draw below 100 µA. Hardware address recognition occurs without CPU wake-up, allowing the device to respond to its own address and trigger an interrupt only upon valid transaction start.

How is firmware updated in the field for CY7C64315-16LKXC?

Firmware is updated via In-System Serial Programming (ISSP) using a two-wire interface (clock and data) and reset signal. This enables field reprogramming without removing the device from the PCB or requiring JTAG hardware - ideal for deployed USB peripherals needing security patches or feature enhancements.