Infineon Technologies CY7C64714-128AXC

Overview

CY7C64714-128AXC from Cypress Semiconductor is a full-speed USB 2.0 peripheral controller integrating an enhanced 8051 microcontroller, USB transceiver, serial interface engine (SIE), and General Programmable Interface (GPIF) in a single 128-pin TQFP package. It delivers 48-MHz 8051 operation, 16 KB on-chip RAM, four programmable BULK/INTERRUPT/ISOCHRONOUS endpoints with double/triple/quad buffering, and supports bus-powered operation at ≤65 mA - enabling compact, self-powered USB device designs such as memory card readers and DSL modems.

For engineers reviewing the CY7C64714-128AXC datasheet, CY7C64714-128AXC pinout, CY7C64714-128AXC application, or CY7C64714-128AXC equivalent, key selection criteria include its ReNumeration™ capability for dynamic USB identity switching, 8-/16-bit parallel GPIF interface for glueless ASIC/DSP interfacing, I²C master support at 100/400 kHz, and dual USARTs operating at 230 kBaud with <1% error across 12/24/48 MHz clock modes.

Technical Context

The CY7C64714-128AXC implements a hardware-accelerated Smart SIE that offloads USB protocol handling-including SETUP/DATA stage separation, vectored interrupts, and automatic descriptor parsing-freeing the 8051 core for application logic. Its GPIF engine uses programmable waveform descriptors and six CTL outputs/six RDY inputs to emulate timing-critical interfaces like ATA, EPP, and PCMCIA without external logic.

USB enumeration is flexible: firmware can be loaded via USB, internal EEPROM (I²C), or external memory (128-pin only); ReNumeration™ enables two-stage enumeration where initial boot firmware downloads new VID/PID/USB descriptors before re-enumerating as a custom device. The chip operates at 3.3 V with 5-V-tolerant I/O and supports three 8051 clock rates (12/24/48 MHz) selected dynamically via CPUCS register.

Key Specifications

Pinout & Package

Package: 128-pin Thin Quad Flat Package (TQFP), RoHS-compliant, lead-free, 0.4 mm pitch, body size 14 × 14 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C64714-128AXC, CY7C68013A offers higher throughput and scalability at the cost of increased firmware development effort, while FT232HL trades programmability for plug-and-play simplicity - making CY7C64714 optimal for mid-complexity, cost-sensitive USB peripheral designs requiring firmware-defined behavior.

Availability

CY7C64714-128AXC is available at Aetrix Electronics and suitable for DSL modems, memory card readers, and legacy conversion devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for CY7C64714-128AXC 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 USB, PSoC, memory, and clock solutions for embedded systems since 1982.

The EZ-USB FX1 product line was designed specifically for cost-sensitive, full-speed USB peripheral applications requiring integrated microcontroller functionality, programmable interface logic, and minimal external components - targeting consumer electronics and industrial connectivity markets.

FAQ

What boot methods does CY7C64714-128AXC support?

The CY7C64714-128AXC supports three boot methods: (1) USB download of firmware and descriptors during enumeration, (2) I²C EEPROM boot (with VID/PID/DID values at 0xC0 or firmware image at 0xC2), and (3) external memory interface (128-pin only). No internal Flash means all code executes from RAM, enabling field-upgradable behavior without hardware changes.

Does CY7C64714-128AXC support high-speed USB (480 Mbps)?

No. CY7C64714-128AXC is a full-speed USB 2.0 device supporting only 12 Mbps signaling. It lacks the high-speed PHY, chirp detection circuitry, and 480 MHz transceiver clock domain required for high-speed operation. This is explicitly stated in Section 4.1 of the datasheet and confirmed by its USB-IF certification scope.

Can CY7C64714-128AXC operate as a USB host?

No. CY7C64714-128AXC is strictly a USB peripheral (device-mode only). It contains no USB host controller logic, OTG capabilities, or VBUS sensing circuitry. Its SIE is designed solely for responding to host-initiated transactions, and all USB descriptors are configured for device enumeration only.

What is the maximum sustained data throughput achievable with CY7C64714-128AXC?

Using quad-buffered BULK endpoints and 48 MHz 8051 operation, CY7C64714-128AXC achieves up to 480 KB/s sustained throughput - limited by full-speed USB bandwidth and efficient FIFO management. Real-world measurements from Cypress reference designs (e.g., CY3671 kit) confirm 450–475 KB/s in mass storage configurations with optimized firmware and host drivers.