Cypress Semiconductor Corp CY7C68003-24LQXIT

Overview

CY7C68003-24LQXIT from Cypress Semiconductor is a USB 2.0 ULPI transceiver supporting full-speed (12 Mbps) and high-speed (480 Mbps) device-mode operation, with integrated 13/19.2/24/26 MHz PLL clock synthesis, 1.8 V core supply, and multi-range 1.8–3.3 V I/O interface. It features on-chip USB pull-up/termination resistors, UART pass-through mode for car-kit applications, and operates across –40 °C to +85 °C.

For engineers reviewing the CY7C68003-24LQXIT datasheet, CY7C68003-24LQXIT pinout, CY7C68003-24LQXIT application, or CY7C68003-24LQXIT equivalent, key selection criteria include ULPI SDR 8-bit interface compliance, VBATT input range (3.0–5.775 V), sleep current (5 µA), active HS transfer current (30 mA), and QFN-24 package compatibility with chip select (CS_N) control.

Technical Context

The CY7C68003 implements UTMI+ Level 0 protocol translation between ULPI and USB physical layers, using an internal PLL locked to 13/19.2/24/26 MHz reference inputs to generate precise 480 MHz USB HS clock. Its dual power domains-1.8 V core (VCC) and 1.8–3.3 V I/O (VIO)-enable direct interfacing with diverse host controllers without level shifters.

It supports device-only USB operation with integrated oscillator circuitry, ESD protection per JESD22-A114D (8 kV HBM) and IEC61000-4-2 (8 kV contact / 15 kV air), and configurable modes including Sleep, Configuration, ULPI Low Power, and Carkit UART Pass-Through via RESET_N and CS_N state combinations.

Key Specifications

Pinout & Package

Package: 4 mm × 4 mm, 24-pin QFN (LQFP-style leadless), 0.5 mm pitch, exposed thermal pad. Pinout validated per Cypress Document 001-15775 Rev. *O, Pages 7–8.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMSC USB3317C-EZK and Microchip USB2514B-AEZG, the CY7C68003-24LQXIT uniquely combines device-only ULPI operation, integrated PLL/crystal oscillator, UART pass-through, and sub-µA sleep-making it optimal for space-constrained, battery-sensitive mobile peripherals where host mode or hub functionality is unnecessary.

Availability

CY7C68003-24LQXIT is available at Aetrix Electronics and suitable for mobile handsets, portable media players, automotive carkit systems, and portable GPS receivers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for CY7C68003-24LQXIT 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 and industrial markets.

The MoBL-USB™ TX2UL product line was designed specifically for ultra-low-power, small-form-factor USB device interfaces in mobile consumer electronics-emphasizing minimal external components, integrated clocking, and flexible power domain management.

FAQ

Is CY7C68003-24LQXIT compatible with USB On-The-Go (OTG) hosts?

No. The CY7C68003-24LQXIT supports USB device mode only and lacks host-mode transceiver circuitry or OTG negotiation logic. It cannot function as a USB host or perform A-device/B-device role swapping. For OTG applications, a dual-role transceiver such as the SMSC USB3317C-EZK is required.

What is the function of the CS_N pin, and is it required in all designs?

The CS_N pin is present only in the 24-pin QFN package and serves two functions: tristating ULPI output pins when deasserted (high), and enabling Configuration Mode when asserted (low) with RESET_N. It is not required for basic operation-if unused, it may be left unconnected or tied high, but Configuration Mode access is then unavailable.

Does CY7C68003-24LQXIT require an external crystal, or can it use an oscillator input?

It supports both: a parallel-resonant 13/19.2/24/26 MHz crystal connected across XI/XO pins, or a single-ended LVCMOS clock (13/19.2/24/26 MHz) driven only on XI with XO floating. Crystal drive level must be ≤750 µW; load capacitance is 12 pF per side assuming 3 pF trace capacitance.

How does UART Pass-Through Mode affect USB functionality?

In UART Pass-Through Mode, the DP/DM pins carry UART signals (TXD/RXD) instead of USB differential data, and the USB link is disabled. The ULPI interface remains active for register access, but no USB enumeration or data transfer occurs. This mode is intended for auxiliary serial communication-not concurrent USB+UART operation.