Infineon Technologies CY7C65620-56LFXCT

Overview

CY7C65620-56LFXCT from Cypress Semiconductor is a 2-port, single-transaction-translator (1TT) USB 2.0 hub controller in a 56-pin QFN package, supporting bus-powered operation, integrated 24 MHz PLL clock generation, and configurable SPI EEPROM-based VID/PID/Port settings. It integrates upstream pull-up, downstream pull-down, and D+/D− termination resistors, reducing BOM count for embedded USB hub designs in space-constrained applications.

For engineers reviewing the CY7C65620-56LFXCT datasheet, CY7C65620-56LFXCT pinout, CY7C65620-56LFXCT application, or CY7C65620-56LFXCT equivalent, key selection criteria include its 2-port 1TT architecture, –40 °C to +85 °C industrial temperature grade, USB-IF TID# 30000009 certification, WHQL compliance, and support for ganged/self/bus power switching modes.

Technical Context

The CY7C65620 implements a dedicated USB 2.0 serial interface engine (SIE) that handles bit stuffing, checksum validation, token identification, and address checking independently of hub control logic. Its hub repeater manages same-speed packet routing between upstream and downstream ports, while the single transaction translator (TT) enables high-speed-to-full-speed split transactions for attached low-speed peripherals.

Configuration is loaded at power-up from an external SPI EEPROM, enabling runtime customization of port count, removability, overcurrent detection mode, LED polarity, and power-on timing. The internal regulator eliminates need for external LDOs, and all USB transceiver terminations are integrated on-die.

Key Specifications

Pinout & Package

Package: 56-pin QFN (7 mm × 7 mm, 0.5 mm pitch), exposed thermal pad, moisture sensitivity level 3 (MSL3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB 2.0 hub controller applications.

Compared with CY7C65630-56LFXCT, this part reduces port count and power consumption for compact designs; versus UPD720114GA-YL-A, it trades multi-TT throughput for smaller footprint, lower cost, and integrated clocking.

Availability

CY7C65620-56LFXCT is available at Aetrix Electronics and suitable for standalone USB hubs, monitor-integrated hubs, industrial docking stations, and embedded keyboard hubs requiring stable component supply, industrial temperature operation, and USB-IF certification.

Supply support for CY7C65620-56LFXCT 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

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in USB, PSoC, memory, and connectivity solutions for industrial, automotive, and consumer markets.

The EZ-USB HX2LP™ family-including CY7C65620-is designed specifically for ultra-low-power, cost-sensitive USB 2.0 hub applications where integration of transceivers, termination, and configuration reduces design cycle time and board area.

FAQ

Is CY7C65620-56LFXCT compatible with CY7C65640?

No. While CY7C65620 shares functional similarity with CY7C65640 (TetraHub™), it is not pin-compatible. CY7C65640 uses a different pinout, supports four ports with dual TT, and lacks integrated termination resistors. Migration requires PCB redesign and firmware updates to accommodate different register maps and EEPROM configuration structures.

Does CY7C65620 support self-powered operation?

No. CY7C65620 is specified for bus-powered operation only. Its internal regulator and power management circuitry are designed to operate solely from upstream VBUS (4.75–5.25 V). Self-powered mode is supported only in the CY7C65630 variant, which includes additional power domain controls and VBUS sensing circuitry not present in CY7C65620.

What EEPROM types are supported for configuration?

CY7C65620 supports both byte-addressable (e.g., AT25040) and word-addressable (e.g., M95040) SPI EEPROMs. Configuration loading occurs during power-up reset; the device automatically detects addressing mode based on initial read response timing. Cypress AN61904 documents timing requirements and compatibility guidelines for 16-/32-/64-kbit devices.

Can downstream port indicators be disabled via EEPROM?

Yes. The EEPROM configuration supports disabling port indicator LEDs globally or per-port via the "Disable port indicators" flag (0xD4 load). When enabled, LED1/LED2 outputs are driven according to port status; when disabled, these pins remain in high-impedance state, allowing external control or removal of indicator circuitry without hardware modification.