Infineon Technologies CY7C65211A-24LTXIT

Overview

CY7C65211A-24LTXIT from Infineon Technologies is a USB 2.0 Full-Speed (12 Mbps) single-channel bridge IC supporting configurable UART (up to 3 Mbps), SPI (master up to 3 MHz / slave up to 1 MHz), and I2C (up to 400 kHz) interfaces, integrated CAPSENSE™ capacitive sensing for up to 5 buttons, battery charger detection (BCD v1.2), and 10 GPIOs - deployed in medical devices, industrial RS485 gateways, and POS terminals.

For engineers reviewing the CY7C65211A-24LTXIT datasheet, CY7C65211A-24LTXIT pinout, CY7C65211A-24LTXIT application, or CY7C65211A-24LTXIT equivalent, key selection criteria include RS485 interface support (vs. CY7C65211), BCD peripheral detection compliance, 48-MHz internal oscillator, 512-byte configuration flash, and QFN-24 package with 0.5 mm pitch.

Technical Context

The device integrates a USB Serial Interface Engine (SIE) with CDC/PHDC/vendor-class support and on-chip USB termination resistors, eliminating external components. Its serial communication block supports simultaneous UART/I2C/SPI configuration via nonvolatile flash, with independent 256-byte TX/RX buffers per interface and hardware flow control (CTS/RTS/DTR/DSR) for UART.

CAPSENSE™ subsystem includes auto-tuning algorithms managed by Infineon's configuration utility and links directly to five GPIOs as sensor inputs; the 48-MHz internal oscillator feeds USB timing and system clocking, while a separate 32-kHz oscillator enables low-power suspend/resume operations.

Key Specifications

Pinout & Package

Package: 24-pin QFN (4.0 mm × 4.0 mm, 0.5 mm pitch, 0.55 mm height), RoHS-compliant, wettable flank capable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C65211-24LTXI, the CY7C65211A-24LTXIT adds RS485 capability and updated PID, enabling drop-in replacement in industrial bus gateways; versus FT232H, it trades raw bandwidth and protocol flexibility for integrated CAPSENSE™, BCD, and lower system-level component count.

Availability

CY7C65211A-24LTXIT is available at Aetrix Electronics and suitable for medical device interface, industrial RS485 gateway, and POS terminal peripheral applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CY7C65211A-24LTXIT 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 German semiconductor manufacturer specializing in power management, automotive MCUs, security ICs, and USB interface solutions with global manufacturing and qualification standards.

The CY7C65211A belongs to Infineon's USB-Serial Bridge product line, designed specifically to simplify USB connectivity for resource-constrained embedded systems requiring mixed-signal integration (CAPSENSE™, BCD, multi-protocol serial).

FAQ

Does CY7C65211A-24LTXIT require an external crystal?

No. The device integrates a factory-trimmed 48-MHz internal oscillator sufficient for USB Full-Speed timing compliance and system clocking. An external crystal is optional only if higher frequency stability or custom clock frequencies beyond 48 MHz are required - not needed for standard CDC operation.

Can CAPSENSE™ be used simultaneously with UART and I2C?

Yes. CAPSENSE™ operates independently using dedicated GPIOs and its own scan engine; UART, I2C, and SPI share the same serial communication block but are time-multiplexed via firmware configuration. All three interfaces and CAPSENSE™ can be active concurrently with proper buffer management and interrupt prioritization.

What is the difference between CY7C65211A-24LTXIT and CY7C65211A-24LQXST?

CY7C65211A-24LTXIT uses a 24-pin QFN package with wettable flanks (T suffix), optimized for automated optical inspection (AOI) in high-volume SMT lines. CY7C65211A-24LQXST uses the same footprint but with standard QFN (no wettable flanks) and tape-and-reel packaging (ST suffix) - differing only in package finish and packaging format, not electrical or functional behavior.

Is Linux kernel driver support built-in or requires out-of-tree modules?

Linux kernel support is built-in starting from version 2.6.35 via the cdc_acm driver for CDC mode and generic USB serial framework for vendor-class mode. No out-of-tree modules are required; device enumeration as /dev/ttyACMx occurs automatically upon plug-in when VID/PID match standard Infineon descriptors.