DS1994 Description
The DS1994 Memory iButton is a rugged read/write data carrier that acts as a localized database, easily accessible with minimal hardware. The nonvolatile memory and optional timekeeping capability offer a simple solution to storing and retrieving vital information pertaining to the object to which the iButton is attached. Data is transferred serially through the 1-Wire protocol that requires only a single data lead...
DS1994 Key Features
- 256-bit Scratchpad Ensures Integrity of Data Transfer
- Memory Partitioned into 256-bit Pages for Packetizing Data
- Data Integrity Assured with Strict Read/Write Protocols
- Contains Real-Time Clock/Calendar in Binary Format
- Interval Timer Can Automatically Accumulate Time When Power is Applied
- Programmable Cycle Counter can Accumulate the Number of System PowerOn/Off Cycles
- Programmable Alarms Can Be Set to Generate Interrupts for Interval Timer, RealTime Clock, and/or Cycle Counter
- Write-Protect Feature Provides Tamperproof Time Data
- Programmable Expiration Date That Limits Access to SRAM and Timekeeping
- Clock Accuracy is Better Than ±2 Minutes/ Month at 25°C