Infineon Technologies CY7C68000A-56LTXCT

Overview

CY7C68000A-56LTXCT from Cypress Semiconductor is a USB 2.0 UTMI-compliant transceiver IC that implements physical-layer serialization/deserialization between USB differential signaling (DPLUS/DMINUS) and parallel host interface (8-/16-bit). 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 at 3.3 V. Used in mobile handsets interfacing with Intel Monahans processors.

For engineers reviewing the CY7C68000A-56LTXCT datasheet, CY7C68000A-56LTXCT pinout, CY7C68000A-56LTXCT application, or CY7C68000A-56LTXCT equivalent, key selection criteria include UTMI v1.05 compliance, tristate-capable 56-pin QFN package, synchronous field/EOP detection, integrated clock recovery, and support for FS/HS termination switching via TermSelect/XcvrSelect pins.

Technical Context

The CY7C68000A implements a dual-mode USB 2.0 PHY with separate FS and HS transceiver paths selected by XcvrSelect, and termination control via TermSelect. Its internal PLL multiplies a 24 MHz crystal input to generate either 30 MHz (16-bit bus) or 60 MHz (8-bit bus) parallel clock, synchronized to CLK output.

It performs bit stuffing/unstuffing and NRZI encoding/decoding in normal mode (OpMode=0), while OpMode=2 disables these functions for test/debug. LineState[1:0] outputs provide real-time, CLK-synchronized reflection of DPLUS/DMINUS states, and RXValid/RXActive/RXError signals enable precise packet-level receive state tracking.

Key Specifications

Pinout & Package

Package: 56-pin QFN (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free, moisture-sensitive level 3.

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-56LTXCT delivers verified UTMI+ compliance, minimal external component count, and Monahans-optimized timing - making it optimal for resource-constrained mobile SoC interfaces where PHY-only integration and rapid qualification are critical.

Availability

CY7C68000A-56LTXCT is available at Aetrix Electronics and suitable for smartphone baseband interfaces, portable media player docking systems, and Intel Monahans processor companion applications requiring stable component supply across production lifecycles.

Supply support for CY7C68000A-56LTXCT 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 interface solutions for embedded and consumer electronics.

The MoBL-USB™ TX2 product line was engineered specifically to deliver certified, low-power, UTMI-compliant USB 2.0 PHYs for mobile and handheld applications - emphasizing integration, small footprint, and seamless ASIC/FPGA interfacing.

FAQ

What is the function of the Tri_state pin, and when is it active?

The Tri_state pin enables full I/O tristating of all outputs and bidirectional pins, but only when the device is already in Suspend mode. It must not be asserted outside Suspend. When activated, it releases the UTMI bus for sharing with other devices - critical in mobile designs with limited GPIO resources. Tristating occurs within ~50 ns of assertion.

Does CY7C68000A-56LTXCT support Low Speed (1.5 Mbps) USB operation?

No. The CY7C68000A-56LTXCT supports only Full Speed (12 Mbps) and High Speed (480 Mbps) USB 2.0 signaling modes. It explicitly excludes Low Speed operation per its functional specification and block diagram. Systems requiring LS compatibility must use a separate transceiver or a controller with integrated LS support.

How is the 30 MHz or 60 MHz parallel clock generated?

An internal PLL multiplies the 24 MHz crystal input (applied to XTALIN/XTALOUT) to generate the required parallel interface clock. The DataBus16_8 pin selects the output frequency: '1' configures 16-bit mode with 30 MHz CLK; '0' configures 8-bit mode with 60 MHz CLK. The PLL stabilizes within ~200 μs after VCC reaches 3.3 V or after Suspend exit.

Can external termination resistors be omitted when using this transceiver?

Yes. All required USB 2.0 terminations - including the 1.5 kΩ DPLUS pull-up resistor and differential line impedance matching - are factory-trimmed and integrated on-die. No external resistors are needed for standard USB 2.0 compliance, reducing PCB area, BOM count, and signal integrity risk.