Microchip has introduced a new Serial EEPROM. The new device utilizes a single-wire bus using only two pins to access the device: SI/O and GRN. The first pin, SI/O, is a line that combines power and data, providing the needed power to the device and the management of the data.
The AT21CS11 is organized as one block of 128 x 8, and it is optimized for use in reliable, non-volatile memory storage applications. The chip includes a preprogrammed unique serial number (ID) and a 128-bit user-programmable tracking number. The operating voltage range is 2.7 to 4.5V, making it suitable for use with lithium-ion batteries.
The AT21CS11 brings identification and tracking to any detachable, replaceable piece of a product. Cartridges, plastic disposables, user-specific attachments and others can communicate unique ID details and use information over a simple two-point clip or plug-in connection. In addition, Microchip's dedicated evaluation kit for the AT21CSxx single-wire family supports the new device
Some of the AT21CS11's important features include the following:
- 128 x 8 (1 Kbit)
- Single-wire compatible
- I²C protocol structure
- Communication through a single I/O pin
- High speed (125 kbps) mode
- Self-rimed erase and write cycles (5 ms max.)
- Low Power Consumption
- Read current 0.08 mA (Typ), 0.3 mA (max)
- Write current 0.2 mA (Typ), 0.5 mA (max)
- Standby current 0.7 uA (Typ), 2.5 uA (max)
- Software write protection
- Four independent 256-bit zones
- More than 1 million erase/write cycles
- Data retention greater than 100 years
- ESD protection greater than 8000V (HBM)
- Factory programming available
- Available in 8-pin SOIC (150 mil), 3-pin SOT23, 2-pad XSFN, and 4-ball Thin CSP packages.