DS28EC20+T

DS28EC20+T is a 20480-bit, 1-Wire® EEPROM organized as 80 memory pages of 256 bits each. An additional page is set aside for control functions. Data is written to a 32-byte scratchpad, verified, and then copied to the EEPROM memory. As a special feature, blocks of eight memory pages can be write protected or put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. The DS28EC20 communicates over the single-conductor 1-wire bus. The communication follows the standard 1-wire protocol. Typical applications include device authentication, IEEE 1451.4 sensor TEDS, ink/toner cartridges, medical sensors, PCB identification, wireless base stations.

• Read and write access highly backward compatible to legacy devices (e.g., DS2433)
• 256-bit scratchpad with strict read/write protocols ensures integrity of data transfer
• 200k write/erase cycle endurance at +25°C
• Switchpoint hysteresis and filtering to optimize performance in the presence of noise
• Enhanced ESD protection
• 1-wire pullup resistance is 2.2Kohm max at VPUP=4V to 5.25V, TA=-40°C to +85°C
• EEPROM programming current is 0.9mA max at VPUP=4V to 5.25V, TA=-40°C to +85°C
• EEPROM programming time is 10ms max at VPUP=4V to 5.25V, TA=-40°C to +85°C
• 3 TO-92 package
• Operating temperature range from -40°C to +85°C

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party.