Single I/O bus for Eeprom family
21 May 2008
Microchip has announced a family of serial Eeprom devices with a single I/O bus interface, based on their patent-pending UNI/O memory-device protocol.
The 11XX010, 11XX020, 11XX040, 11XX080 and 11XX160 are single I/O Eeprom devices that can support data rates from 10kHz to 100 kHz. Furthermore, the manufacturer claims that they are the only one, two, four, eight, and 16Kbit Eeproms available in a three-pin SOT-23 package (in addition to other higher pin count packages).
The new devices also includes status registers, software write protection for quarter, half, or full array, noise filtering, and ESD protection.
The UNI/O bus and Eeprom devices were developed in response to market trends toward smaller consumer-electronic products with more features and functionality. With this new bus, only one I/O pin is needed for communication between the Eeprom device and the microcontroller.
Evaluation is simplified because the UNI/O memory devices are available in eight-pin packages with pin-outs that overlay any standard I2C or SPI Eeprom socket. This means that existing hardware can be used with the available UNI/O software drivers for a quick test.
The new devices are offered in two versions. The 11LCXX0 versions operate from 2.5V to 5.5V, and the 11AAXX0 versions operate from 1.8V to 5.5V. All of the new memory devices are available in three-pin SOT-23 as well as eight-pin PDIP, MSOP, SOIC and 2mm x 3mm TDFN packages.
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