Infineon Technologies CY7C64356-48LTXCT

Overview

CY7C64356-48LTXCT 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 eight unidirectional + one bidirectional USB endpoints. It operates at up to 24 MHz, supports 3.15–3.45 V or 4.35–5.25 V USB-enabled supply, and delivers programmable I/O drive modes including hot-swappable Port 1 for industrial human-interface devices.

For engineers reviewing the CY7C64356-48LTXCT datasheet, CY7C64356-48LTXCT pinout, CY7C64356-48LTXCT application, or CY7C64356-48LTXCT equivalent, key selection criteria include USB 2.0 TID# 40000893 compliance, crystal-less 24 MHz IMO with ±0.25% accuracy locked to USB data, configurable 10-bit ADC, I²C slave with hardware address detection, and 48-pin LQFP package with 36 GPIOs.

Technical Context

The device implements a dedicated USB Serial Interface Engine (SIE) that autonomously handles CRC generation/checking, token decoding (SETUP/IN/OUT), ACK/NAK/Stall handshaking, and SOF frame counting-reducing firmware overhead. Its 512-byte dedicated USB SRAM is managed via the PSoC Memory Arbiter (PMA) with channel-based access control.

System clocking combines a 24 MHz internal main oscillator (IMO) with automatic lock to USB data stream for ±0.25% frequency stability, eliminating external crystals; a 32 kHz internal low-speed oscillator (ILO) enables sub-100 µA sleep-mode operation with I²C active during deep sleep.

Key Specifications

Pinout & Package

Package: 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

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, CY7C64356-48LTXCT uniquely integrates crystal-less USB timing, hot-swappable I/O, and dedicated USB buffer in a single-chip solution optimized for cost-sensitive, low-power HID and bridge applications without external timing components.

Availability

CY7C64356-48LTXCT is available at Aetrix Electronics and suitable for USB human-interface devices, industrial control panels, USB-to-I²C bridges, and medical sensor hubs requiring stable component supply across extended product lifecycles.

Supply support for CY7C64356-48LTXCT 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, automotive ICs, and secure connectivity solutions.

This device belongs to the enCoRe™ V family - a line of single-chip, full-speed USB microcontrollers designed to replace discrete USB PHY + MCU combinations in cost-sensitive, low-power peripheral applications.

FAQ

Does CY7C64356-48LTXCT require an external crystal for USB operation?

No. The device uses an internal 24 MHz main oscillator (IMO) that locks to USB data stream timing, achieving ±0.25% accuracy without external crystal or resonator. XIN/XOUT pins are optional and may be left unconnected unless external timing is specifically required for non-USB functions.

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 specified thermal conditions and must be derated if other ports are simultaneously sourcing or sinking significant current.

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

Yes. When configured to use the analog mux bus instead of the default temperature sensor input, the ADC accepts external DC voltages from 0 V to VREFADC (typically VDD). No external op-amp or scaling resistors are needed for measurement within this range, though input protection may be required for overvoltage conditions.

Is CY7C64356-48LTXCT compatible with modern Windows and macOS hosts without custom drivers?

Yes. As a USB 2.0 Full-Speed device with TID# 40000893 certification, it supports standard class drivers (HID, CDC, MSC) on Windows 10/11, macOS 12+, and Linux kernels ≥2.6. Custom class implementations require signed INF files or user-space drivers but do not affect basic enumeration or power delivery.