Serial EEPROM Family from Microchip Uses Single I/O Bus
Microchip has announced a family of serial EEPROM devices with a single I/O bus interface. The 11XX010, 11XX020, 11XX040, 11XX080 and 11XX160 are the first single I/O EEPROM devices that can support data rates from 10 kHz to 100 kHz; and the only 1, 2, 4, 8 and 16 Kbit EEPROMs available in a 3-pin SOT-23 package (in addition to other higher pin count packages). The new devices also include advanced such as status registers; software write protection for ¼, ½ or full array; noise filtering, and robust ESD protection for the highest reliability.
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 (MCU).
Evaluation is simplified because the UNI/O memory devices are available in 8-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 UNI/O memory devices are supported by the new MPLAB® Starter Kit for Serial Memory Products (Part number DV243003, microchipDIRECT price $79.98), the MPLAB PM3 Universal Device Programmer (Part number DV007004, microchipDIRECT price $895) and by software drivers available for Microchip’s PIC® MCUs at www.microchip.com. Drivers for other MCUs will be available in the future.
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 3-pin SOT-23 as well as 8-pin PDIP, MSOP, SOIC and 2x3mm TDFN packages.