DS28EC20
RECOMMENDED FOR NEW DESIGNS20Kb 1-Wire EEPROM
20Kb Serial EEPROM Operates from Single-Contact 1-Wire Interface
- Part Models
- 6
- 1ku List Price
- Starting From $1.81
Part Details
- 20480 Bits of Nonvolatile (NV) EEPROM Partitioned into Eighty 256-Bit Pages
- Individual 8-Page Groups of Memory Pages (Blocks) can be Permanently Write Protected or Put in OTP EPROM-Emulation Mode ("Write to 0")
- 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
- Unique Factory-Programmed 64-Bit Registration Number Ensures Error-Free Device Selection and Absolute Part Identity
- Switchpoint Hysteresis and Filtering to Optimize Performance in the Presence of Noise
- Communicates to Host at 15.4kbps or 90kbps Using 1-Wire Protocol
- Low-Cost TO-92 Package
- Operating Range: 4V to 5.25V, -40°C to +85°C
- Operating Range: 3.135V to3.465V, 0°C to +70°C (Standard Speed only)
- IEC 1000-4-2 Level 4 ESD Protection (±8kV Contact, ±15kV Air, Typical) for I/O Pin
The DS28EC20 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. Each device has its own unalterable and unique 64-bit ROM registration number. The registration number is used to address the device in a multidrop 1-Wire net environment.
Applications
- Card/Module Identification in Rack-Based Systems
- Device Authentication
- IEEE 1451.4 Sensors
- Ink and Toner Cartridge ID
- Medical and Industrial Sensor Identification/Calibration
- PCB Identification
- Smart Cable
Documentation
Data Sheet 1
Reliability Data 1
Design Note 2
Technical Articles 8
3rd Party Solutions 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| DS28EC20+ | TO92 | ||
| DS28EC20+T | TO92 | ||
| DS28EC20P+ | Thin Small-Outline C-Lead | ||
| DS28EC20P+T | Thin Small-Outline C-Lead | ||
| DS28EC20Q+T | Thin Dual Flatpack No Leads, Exposed Pad | ||
| DS28EC20Q+U | Thin Dual Flatpack No Leads, Exposed Pad |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
Software Development 1
Evaluation Kits
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