DS1972 iButton

iButton 1024-bit EEPROM

The iButton® EEPROM DS1972 is a 1024-bit, 1-Wire® EEPROM chip in a rugged iButton package. Data is written to an 8-byte scratchpad, verified, and then copied to the EEPROM memory. As a special feature, the four memory pages can individually be write protected or put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. The DS1972 communicates over the single-conductor 1-Wire bus. The communication follows the standard 1-Wire protocol. Each device has its own unalterable and unique 64-bit ROM registration number that is factory lasered into the device. The registration number is used to address the device in a multidrop, 1-Wire net environment.

Key Features

  • 1024 Bits of EEPROM Memory Partitioned into Four Pages of 256 Bits
  • Individual Memory Pages can be Permanently Write Protected or Put in EPROM-Emulation Mode ("Write to 0")
  • Switchpoint Hysteresis and Filtering to Optimize Performance in the Presence of Noise
  • IEC 1000-4-2 Level 4 ESD Protection (±8kV Contact, ±15kV Air, typical)
  • Reads and Writes Over a Wide Voltage Range of 2.8V to 5.25V from -40°C to +85°C
  • Communicates to Host with a Single Digital Signal at 15.4kbps or 125kbps Using 1-Wire Protocol

Datasheet

 

DS1972-F5+ iButton
Availability: 30328 in stock.
SKU: 150.001.19720
€4.30 excl tax
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DS1972-F3+ iButton
Availability: 18113 in stock.
SKU: 150.001.19721
€4.30 excl tax
PRICE BREAKS - The more you buy, the more you save
Quantity 5+ 10+ 25+ 50+ 100+ 250+
Price €4.20 €4.05 €3.90 €3.75 €3.19 €2.96
This product has a minimum quantity of 100