DS28EC20
20Kb 1-Wire EEPROM
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20Kb Serial EEPROM Operates from Single-Contact 1-Wire Interface
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Features
- 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
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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
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DS28EC20
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Data Sheet 1
Reliability Data 1
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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 |
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| DS28EC20+ |
TO92
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| DS28EC20+T |
TO92
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| DS28EC20P+ |
Thin Small-Outline C-Lead
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| DS28EC20P+T |
Thin Small-Outline C-Lead
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| DS28EC20Q+T |
Thin Dual Flatpack No Leads, Exposed Pad
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| DS28EC20Q+U |
Thin Dual Flatpack No Leads, Exposed Pad
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- DS28EC20+
- Pin/Package Drawing
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TO92
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HTML
Material Declaration
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HTML
Reliablity Data
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Ultra Librarian
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SamacSys
- DS28EC20+T
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TO92
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HTML
Material Declaration
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HTML
Reliablity Data
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Ultra Librarian
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SamacSys
- DS28EC20P+
- Pin/Package Drawing
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Thin Small-Outline C-Lead
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
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SamacSys
- DS28EC20P+T
- Pin/Package Drawing
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Thin Small-Outline C-Lead
- Documentation
-
HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- DS28EC20Q+T
- Pin/Package Drawing
-
Thin Dual Flatpack No Leads, Exposed Pad
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- DS28EC20Q+U
- Pin/Package Drawing
-
Thin Dual Flatpack No Leads, Exposed Pad
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
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SamacSys
Filter by Model
Part Models
Product Lifecycle
PCN
Apr 14, 2020
- 1998A
ASSEMBLY
DS28EC20+
PRODUCTION
DS28EC20+T
PRODUCTION
Jan 22, 2020
- 1998N
ASSEMBLY
DS28EC20+
PRODUCTION
Jun 20, 2016
- 1612
ASSEMBLY
DS28EC20Q+T
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
Apr 14, 2020
- 1998A
ASSEMBLY
Jan 22, 2020
- 1998N
ASSEMBLY
Jun 20, 2016
- 1612
ASSEMBLY
Software & Part Ecosystem
Evaluation Kits 3
DS9120P
Socket Boards for Evaluating 1-Wire Devices
Product Detail
The DS9120 family of socket boards are RJ11-to-socket boards that provide the hardware connectivity necessary to evaluate and operate 1-Wire® products in an easy-to-use PC environment. Additionally, the socket boards can be readily used with the DS9481R USB-to1-Wire adapter to create a 1-Wire PC programmer for 1-Wire EEPROM and one-time programmable (OTP)/EPROM devices.
Resources
DS9120Q
Socket Boards for Evaluating 1-Wire Devices
Product Detail
The DS9120 family of socket boards are RJ11-to-socket boards that provide the hardware connectivity necessary to evaluate and operate 1-Wire® products in an easy-to-use PC environment. Additionally, the socket boards can be readily used with the DS9481R USB-to1-Wire adapter to create a 1-Wire PC programmer for 1-Wire EEPROM and one-time programmable (OTP)/EPROM devices.
DS9120
Socket Boards for Evaluating 1-Wire Devices
Product Detail
The DS9120 family of socket boards are RJ11-to-socket boards that provide the hardware connectivity necessary to evaluate and operate 1-Wire® products in an easy-to-use PC environment. Additionally, the socket boards can be readily used with the DS9481R USB-to1-Wire adapter to create a 1-Wire PC programmer for 1-Wire EEPROM and one-time programmable (OTP)/EPROM devices.
Tools & Simulations 1
Software Development 1
