Infineon Technologies CY7C65620-56LTXIT

Overview

CY7C65620-56LTXIT from Cypress Semiconductor is a 2-port, single-transaction-translator (1TT) USB 2.0 hub controller in a 56-pin QFN package, operating from a single 3.3 V supply with integrated 24 MHz PLL clock generation, internal voltage regulation, and on-chip pull-up/pull-down/termination resistors. It supports bus-powered operation, full-speed and high-speed device attachment, and in-system SPI EEPROM configuration for VID/PID/DID, port count, power settings, and overcurrent behavior.

For engineers reviewing the CY7C65620-56LTXIT datasheet, CY7C65620-56LTXIT pinout, CY7C65620-56LTXIT application, or CY7C65620-56LTXIT equivalent, key selection criteria include its 2-port 1TT architecture, automotive-grade temperature range (–40 °C to +85 °C), USB-IF certification (TID# 30000009), WHQL compliance, and configurable port power switching and indicator control.

Technical Context

The CY7C65620 implements a USB 2.0 hub repeater for same-speed traffic (e.g., high-speed upstream to high-speed downstream) and a dedicated transaction translator (TT) for speed translation between high-speed upstream and full-/low-speed downstream devices. Its serial interface engine (SIE) handles bit stuffing, checksums, token identification, and address checking autonomously.

Configuration is loaded at power-up from an external SPI EEPROM, enabling runtime customization of vendor/product IDs, active/removable port count, per-port power limits, overcurrent detection polarity/timing, and LED indicator behavior - all without firmware modification.

Key Specifications

Pinout & Package

Package: 56-pin QFN (8 mm × 8 mm, 0.5 mm pitch), thermally enhanced with exposed pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C65630-56LTXIT, the CY7C65620 offers lower power and smaller BOM for 2-port use cases; versus USB2514B-AEZG, it provides guaranteed automotive-grade operation and simpler single-supply design at the expense of port count and dual-TT capability.

Availability

CY7C65620-56LTXIT is available at Aetrix Electronics and suitable for standalone USB hubs, monitor-integrated hubs, industrial docking stations, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.

Supply support for CY7C65620-56LTXIT 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) designs high-performance, low-power programmable system-on-chip solutions for USB, memory, PSoC, and connectivity applications.

The EZ-USB HX2LP™ family - including CY7C65620 - was engineered specifically for ultra-low-power, cost-optimized USB 2.0 hub implementations in space-constrained, thermally demanding environments such as docking stations and automotive interfaces.

FAQ

Does CY7C65620-56LTXIT require an external crystal?

Yes - it requires a 24 MHz fundamental-mode crystal connected to XIN/XOUT pins. The device integrates a PLL that locks to this reference to generate all internal USB clocks. No external oscillator is supported; crystal load capacitance must be matched to the specified 12 pF per the datasheet.

Can CY7C65620 operate without an external SPI EEPROM?

No - it relies on external SPI EEPROM for critical configuration including VID/PID/DID, port enablement, and power settings. If EEPROM is absent or unreadable, the device halts initialization after power-up and does not enumerate. Default descriptors are not factory-programmed.

What is the function of the OVR# pins?

OVR#1 and OVR#2 are open-drain, active-low overcurrent fault indicators. Each corresponds to one downstream port and asserts low when the associated port's current exceeds the EEPROM-configured threshold. They interface directly with external power-switch MOSFET gate drivers to disable port power within microseconds.

Is CY7C65620-56LTXIT pin-compatible with CY7C65640?

No - although CY7C65620 is functionally compatible with CY7C65640 (TetraHub™), it is not pin-compatible. CY7C65640 uses a 48-pin QFN package, while CY7C65620 uses a 56-pin QFN. Pin counts, layouts, and power/ground distribution differ significantly between the families.