Cypress Semiconductor Corp CY7C68003-24LQXI

Overview

CY7C68003-24LQXI 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, on-chip oscillator, and 1.8 V core supply. It features 8-bit SDR ULPI interface, multi-voltage I/O (1.8–3.3 V), and integrated USB pull-up/termination resistors. Designed for mobile handsets, it operates across –40 °C to +85 °C and consumes 5 µA in sleep mode.

For engineers reviewing the CY7C68003-24LQXI datasheet, CY7C68003-24LQXI pinout, CY7C68003-24LQXI application, or CY7C68003-24LQXI equivalent, key selection criteria include ULPI compliance, VBATT input range (3.0–5.775 V), UART pass-through capability via DP/DM, and QFN-24 package compatibility with chip select (CS_N) control.

Technical Context

The CY7C68003-24LQXI implements UTMI+ Level 0 compliance with an 8-bit single-data-rate ULPI interface and supports dynamic I/O voltage selection (1.8 V–3.3 V) via VIO supply. Its integrated PLL locks to 13, 19.2, 24, or 26 MHz reference inputs and generates precise USB clocking without external components.

It integrates USB FS/HS PHY circuitry with on-die termination and pull-up resistors, eliminating discrete BOM items. The device supports five operation modes - normal, configuration, ULPI low-power, sleep, and Carkit UART pass-through - controlled via RESET_N and CS_N with defined timing states (tSTATE).

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 USB2502-AEZG, the CY7C68003-24LQXI delivers lowest system-level BOM count for dedicated device-mode mobile applications, with unique UART pass-through and battery-input flexibility - but lacks host support or hub functionality.

Availability

CY7C68003-24LQXI is available at Aetrix Electronics and suitable for mobile handset connectivity, portable media player USB links, and portable GPS unit data sync requiring stable component supply, long-term lifecycle support, and industrial temperature qualification.

Supply support for CY7C68003-24LQXI 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™ TX2UL product line was designed specifically for ultra-low-power, space-constrained mobile device USB interfaces - emphasizing minimal external components, battery-input compatibility, and ULPI interoperability with application processors.

FAQ

Does CY7C68003-24LQXI support USB host mode?

No. The CY7C68003-24LQXI is a USB 2.0 device-mode-only transceiver. It does not implement host controller logic or UTMI+ Level 1/2 host interface features. Its ULPI interface is strictly configured for device-side signaling, and the datasheet explicitly states "Support USB device mode only" in the Features section.

What is the function of the CS_N pin in the 24-pin QFN package?

In the 24-pin QFN package, CS_N serves two roles: (1) tristating all ULPI output pins (DATA[7:0], CLOCK, DIR, STP, NXT) when deasserted (high), and (2) enabling Configuration Mode when asserted (low) simultaneously with RESET_N. This pin is absent in the 20-pin WLCSP variant.

Can the CY7C68003-24LQXI operate without an external crystal?

Yes. It supports both crystal-based (XI/XO) and single-ended LVCMOS clock input (XI only) at 13/19.2/24/26 MHz. When using LVCMOS input, XO must be left floating. The internal oscillator circuit and PLL eliminate need for external clock generation ICs in either configuration.

How is UART pass-through mode enabled and used?

UART pass-through is enabled by setting the Carkit Mode bit in the Interface Control Register. Once activated, DP becomes UART RXD input and DM becomes UART TXD output, allowing Bluetooth hands-free communication over USB lines. Clock is automatically powered down in this mode to reduce power consumption.