The DS1977 is a 32KB EEPROM in a rugged iButton® enclosure. Access to the memory can be password protected with different passwords for read-only and full access. Data is transferred serially through the 1-Wire® protocol, which requires only a single data lead and a ground return. Every DS1977 is factory lasered with a guaranteed unique 64-bit registration number that allows for absolute traceability. The durable stainless-steel iButton package is highly resistant to environmental hazards such as dirt, moisture, and shock. Accessories permit the DS1977 iButton to be mounted on almost any object, including containers, pallets, and bags.
Key Features
Applications/Uses
SPECIAL FEATURES
32KB EEPROM Organized as Pages of 64 Bytes Each
Optional Password Protection with Different 64-Bit Passwords for Read and Full Access
Communicates to Host with a Single Digital Signal at Up to 15.3kbps at Standard Speed or Up to 125kbps in Overdrive Mode Using 1-Wire Protocol
Operating Range: 2.8V to 5.25V, -40°C to +85°C
Minimum 100k Write Cycles Endurance
15kV Built-in ESD Protection
COMMON iButton FEATURES
Unique Factory-Lasered 64-Bit Registration Number Assures Error-Free Device Selection and Absolute Traceability Because No Two Parts are Alike
Built-In Multidrop Controller for 1-Wire Net
Chip-Based Data Carrier Stores Digital Identification and Information, Armored in a Durable Stainless-Steel Case
Data can be Accessed While Affixed to Object
Button Shape is Self-Aligning with Cup-Shaped Probes
Easily Affixed with Self-Stick Adhesive Backing, Latched by its Flange, or Locked with a Ring Pressed onto its Rim
Presence Detector Acknowledges when Reader First Applies Voltage
Designed to meet UL#913 (4th Edit.); Intrinsically Safe Apparatus: Under Entity Concept for use in Class I, Division 1, Group A, B, C, and D Locations , contact Dallas Semiconductor for certification schedule
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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