Infineon Technologies CY7C68000A-56LFXC

Overview

CY7C68000A-56LFXC from Cypress Semiconductor is a USB 2.0 UTMI-compliant transceiver IC implementing physical-layer serialization/deserialization between USB differential signaling (DPLUS/DMINUS) and parallel host interface. It supports both High Speed (480 Mbps) and Full Speed (12 Mbps) modes, integrates internal 1.5 kΩ DPLUS pull-up and on-die impedance termination, and operates from a 24 MHz crystal with on-chip PLL generating 30 MHz (16-bit bus) or 60 MHz (8-bit bus) clock. Used in mobile handsets interfacing Intel Monahans processors.

For engineers reviewing the CY7C68000A-56LFXC datasheet, CY7C68000A-56LFXC pinout, CY7C68000A-56LFXC application, or CY7C68000A-56LFXC equivalent, key selection criteria include UTMI v1.05 compliance, tristate-enabled shared-bus operation, integrated analog termination, synchronous field/EOP detection/generation, and dual-speed (HS/FS) transceiver switching via XcvrSelect/TermSelect pins.

Technical Context

The CY7C68000A implements a full UTMI+ Level 1–compliant PHY layer with dedicated HS and FS transceiver paths selected by XcvrSelect and termination control via TermSelect. Its internal PLL locks to a 24 MHz ±100 ppm crystal to generate precise 30 MHz (16-bit mode) or 60 MHz (8-bit mode) parallel interface clocks synchronized to USB packet boundaries.

It performs real-time bit stuffing/unstuffing and NRZI encoding/decoding, detects SE0, J/K states via LineState[1:0], and provides synchronous EOP/SYNC assertion timing relative to TXValid/RXValid. Operational modes (OpMode[1:0]) enable soft disconnect, disable encoding, or normal USB protocol handling without external logic.

Key Specifications

Pinout & Package

Package: 56-pin QFN (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, thermally enhanced with exposed pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB 2.0 UTMI transceiver applications.

Compared with ISP1507A and USB3300, the CY7C68000A offers tighter integration of crystal oscillator + PLL + termination, lower pin count for QFN/VFBGA packages, and optimized timing for Intel Monahans interfaces-making it preferred for cost-sensitive, space-constrained mobile device PHY implementations where OTG is not needed.

Availability

CY7C68000A-56LFXC is available at Aetrix Electronics and suitable for smartphone baseband interfaces, Intel Monahans companion designs, and portable media player docking systems requiring stable component supply and long-term lifecycle support.

Supply support for CY7C68000A-56LFXC 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 programmable system-on-chip (PSoC), memory, and USB connectivity solutions for embedded systems.

The MoBL-USB™ TX2 product line was designed specifically to deliver compact, low-power, UTMI-compliant USB 2.0 PHYs for mobile and handheld applications where board space, power efficiency, and integration density are critical.

FAQ

What is the function of the Tri_state pin, and when must it be asserted?

The Tri_state pin places all I/Os and outputs into high-impedance state, enabling shared use of the UTMI bus with other devices. It can only be asserted while the device is in Suspend mode (Suspend = LOW). Assertion occurs within ~50 ns, and deassertion restores drive strength in ~50 ns. Leaving inputs floating during Tri_state is prohibited.

Does CY7C68000A-56LFXC require external termination resistors for USB data lines?

No. The CY7C68000A-56LFXC integrates all required USB 2.0 terminations: internal 1.5 kΩ pull-up on DPLUS and precisely trimmed differential impedance matching on DPLUS/DMINUS. External resistors are unnecessary and would violate USB specification compliance.

How does the device handle clock generation for the parallel interface?

The device uses an on-chip PLL locked to an external 24 MHz ±100 ppm crystal (connected to XTALIN/XTALOUT) to generate either 30 MHz (for 16-bit mode) or 60 MHz (for 8-bit mode) parallel interface clock. The DataBus16_8 pin selects the mode and corresponding clock frequency at power-on reset.

Can CY7C68000A-56LFXC operate in Low Speed (1.5 Mbps) USB mode?

No. The CY7C68000A-56LFXC supports only Full Speed (12 Mbps) and High Speed (480 Mbps) USB 2.0 modes. It explicitly excludes Low Speed operation per its functional specification and pin-level timing requirements.