Features and Benefits
- USB 2.0 Hi-Speed and Full-Speed Compliant
- SDHC Card Support
- Internal Hi-Speed USB SD Card Reader Eases Host µP Overhead
- On-Chip Termination and Pullup Resistors
- Accommodates Clock Input Frequencies
- 26MHz, 19.2MHz, 13MHz, and 12MHz
- Internal Clock Squarer for Low-Amplitude TCXO Signals
- No Power-Supply Sequencing Required
- Compatible with +1.8V to +3.3V I/O Host Microprocessor
- Simple Control Mode Requires Only a Single GPIO
- I²C Control Provides Multiple Configuration Options
- On-Chip Power-On Reset/Brown-Out Reset
The MAX14500–MAX14503 USB-to-SD™ card readers provide a means for portable devices that support full-speed USB communication (12Mbps) with one or two SD card slots, upgrading the USB SD card reader function to USB Hi-Speed (480Mbps) operation. The MAX14500–MAX14503 have two modes of operation: Pass Thru and Card Reader. In pass thru, the SD and USB signals pass through the MAX14500–MAX14503 without modification, appearing like the device is not present. The host microprocessor firmware does not need modification, as there is no change from the host microprocessor's perspective. In Card Reader mode, the MAX14500–MAX14503 implement a Hi-Speed USB card reader that operates independently of the host microprocessor. All the capabilities of the full-speed USB port and SD card slot are preserved with the additional feature that allows a faster way for a PC to read or write to the SD card. The MAX14500–MAX14503 support SD high capacity SDHC cards. The 40-pin TQFN version supports one SD card, while the 56-bump WLP version supports two SD cards.
The MAX14500–MAX14503 feature advanced power-saving modes to reduce power consumption in portable applications. The low-power Sleep modes allow the ability to disable internal circuit blocks, providing power-saving operating modes. The default clock input for each part number is specified in the ordering information. The MAX14500–MAX14503 feature the option to change the default values using the I²C interface.
The MAX14502 is available in a 5mm × 5mm, 40-pin TQFN package. This device operates over a wide supply voltage range and are specified over the -40°C to +85°C extended temperature range.
- Cell Phones
- Digital Still Cameras
- MP3 Players
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The MAX14502 evaluation kit (EV kit) provides a proven design to evaluate the MAX14502 Hi-Speed USB-to-SD card reader. The EV kit includes Windows® 2000/XP- and Windows Vista®-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the MAX14502.
The MAX14502 EV kit has a built-in USB-to-I²C bridge, allowing a PC to access the internal I²C registers of the MAX14502, as well as providing the power for the EV kit.
The MAX14502 EV kit PCB comes with a MAX14502AETL+ installed. The EV kit can also be used to evaluate the MAX14500AETL+, MAX14501AETL+, and MAX14503AETL+ by replacing the MAX14502AETL+, and changing the crystal oscillator frequency according to the device used or by applying an appropriate external clock on the SMA connector. Contact the factory for free samples of the MAX14500AETL+, MAX14501AETL+, and MAX14503AETL+.
- Cell Phones
- Digital Still Cameras
- MP3 Players
Features & Benefits
- Simple and I²C Control Modes
- On-Board SD Card Socket, USB Type-A, and USB Type-B Connectors
- Default 19.2MHz Input Clock, Alternative Input Clock Connector Provided
- External Microprocessor Connections Provided
- Windows 2000/XP- and Windows Vista (32-Bit)-Compatible Software
- On-Board USB-to-I²C Bridge
- USB Powered (Cable Included)
- Lead(Pb)-Free and RoHS Compliant
- Proven PCB Layout
- Fully Assembled and Tested
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
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(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.