Infineon Technologies CY7C65216D-32LTXIT

Overview

CY7C65216D-32LTXIT from Infineon Technologies (formerly Cypress) is a USB 2.0 Full-Speed dual-channel I²C bridge controller with integrated 48-MHz oscillator, 12 GPIOs, and Battery Charging Detection (BCD) v1.2 compliance. It operates from 1.71–5.5 V, supports master/slave I²C up to 400 kHz per channel, and targets legacy peripheral USB interface upgrades in medical, POS, and industrial systems.

For engineers reviewing the CY7C65216D-32LTXIT datasheet, CY7C65216D-32LTXIT pinout, CY7C65216D-32LTXIT application, or CY7C65216D-32LTXIT equivalent, key selection criteria include dual I²C channel configurability, vendor-class USB protocol support, BCD peripheral detection capability, and QFN-32 package compatibility with 0.5 mm pitch layout constraints.

Technical Context

This device implements a USB Serial Interface Engine (SIE) with two independent Serial Communication Blocks (SCB0/SCB1), each configured exclusively as an I²C master or slave. Each channel includes dedicated 8-byte RX/TX FIFOs and supports multi-master arbitration and clock stretching.

The integrated 48-MHz oscillator eliminates external crystal requirements, while the USB transceiver includes on-die 1.5-kΩ pull-up and 15-kΩ termination resistors. Power management supports bus-powered, self-powered, and variable I/O voltage modes with suspend/resume via nXRES and WAKEUP signals.

Key Specifications

Pinout & Package

32-pin QFN package with exposed thermal pad (5 × 5 × 1 mm, 0.5 mm pitch). Pin 1 marked by top-side dot; GND pad soldered for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB-to-I²C bridge applications.

Compared with CY7C65216D-32LTXIT, CY7C65215A offers protocol flexibility at higher complexity and cost, while FT201Q trades channel count and features for footprint and bill-of-materials reduction-making CY7C65216D optimal for balanced dual-I²C bridging with BCD and GPIO headroom.

Availability

CY7C65216D-32LTXIT is available at Aetrix Electronics and suitable for medical point-of-care monitors, industrial sensor hubs, and POS terminal adapters requiring stable component supply and long-term lifecycle support.

Supply support for CY7C65216D-32LTXIT 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 security solutions for automotive, industrial, and IoT markets.

CY7C65216D belongs to the USB-Serial Bridge Controller family, designed specifically to simplify USB interface integration for legacy I²C, SPI, and UART peripherals without firmware development.

FAQ

Does CY7C65216D-32LTXIT require external crystal or oscillator?

No. The device integrates a precision 48-MHz internal oscillator, eliminating the need for external timing components. This reduces BOM cost and PCB area while maintaining USB Full-Speed timing accuracy within ±0.25% tolerance, sufficient for CDC and vendor-class USB enumeration without crystal calibration.

Can both I²C channels operate simultaneously and independently?

Yes. SCB0 and SCB1 are fully independent Serial Communication Blocks, each with dedicated 8-byte RX/TX FIFOs and configurable master/slave mode. They can communicate with separate I²C buses concurrently under host USB command, with no shared resources or arbitration overhead.

What USB device classes does CY7C65216D-32LTXIT support out-of-the-box?

It supports USB Communication Device Class (CDC), Personal Healthcare Device Class (PHDC), and vendor-specific class. CDC enables automatic VCOM port assignment on Windows/macOS/Linux; PHDC supports medical device enumeration; vendor class allows custom descriptor programming for proprietary host applications.

How is GPIO functionality configured and retained across power cycles?

GPIO configuration (direction, pull-up/down, interrupt enable) is programmed via Cypress's USB-Serial Configuration Utility and stored in the device's 32 KB on-chip flash memory. Settings persist after power loss and are automatically restored on power-up, ensuring consistent I/O behavior without host reinitialization.