DS28EC20+

The DS28EC20+ is a 20Kb 1-wire EEPROM in 3 pin TO-92 package. A 20480bit, 1-wire EEPROM organized as 80 memory pages of 256bits each. An additional page is set aside for control functions. Data is written to a 32byte scratchpad, verified and then copied to 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 1state to a 0state. It communicates over single conductor 1-wire bus. Device has its own unalterable and unique 64bit ROM registration number. The registration number is used to address device in a multidrop 1-wire net environment. It is used in device authentication, IEEE 1451.4 sensor TEDS, Ink/toner cartridges, medical sensors, PCB identification and wireless base stations.

• Supply voltage range is 4.75V to 5.25V
• Operating temperature range from -40°C to 85°C
• Read and write access highly backward compatible to legacy devices (e.g. DS2433)
• 256bit 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
• Communicates to host at 15.4Kbps or 90Kbps using 1-wire protocol
• IEC 1000-4-2 level 4 ESD protection (±8kV contact, ±15kV air, typical) for I/O pin

Applications

Embedded Design & Development

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