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TI USB 2.0 bridge halves power consumption

Posted: 23 Sep 2002 ?? ?Print Version ?Bookmark and Share

Keywords:texas instruments? tusb6250? usb 2.0 bridge ic? ata bridge ic? atapi bridge ic?

The TUSB6250 programmable USB 2.0 to ATA/ATAPI bridge from Texas Instruments Inc. cuts power consumption by more than half of competing devices, making the development of bus-powered USB 2.0 storage peripherals a reality.

Applications for the TUSB6250 include HDDs, ZIP drives, CD-RW, DVDs, magneto-optical drives as well as USB 2.0-based digital audio players.

The 80-pin TQFP device integrates a 60MHz 8051 microcontroller architected for two clocks per cycles, 8KB of ROM, 4KB of SRAM, and 40KB of RAM configurable for either code or data space. A USB 2.0 transceiver is also integrated that supports both high speed and full speed operations.

The device operates from a 3.3V source, draws 100mA during operation, and <500?A during shutdown. This low standby power requirement contributes to extended battery life in portable applications and allows the audio player's battery to be recharged using the USB cable connection to the PC, eliminating the need for a wall-mounted "brick" recharging unit.

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