DS28EC20：20Kb 1-Wire EEPROM _ BDTIC a Leading Distributor in China

DS28EC20：20Kb 1-Wire EEPROM

20Kb Serial EEPROM Operates from Single-Contact 1-Wire Interface

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.

Key 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: 5V ±5%, -40°C to +85°C
IEC 1000-4-2 Level 4 ESD Protection (8kV Contact, 15kV Air, Typical) for I/O Pin

DS28EC20: Typical Operating Circuit

Applications/Uses

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

DataSheet

title	Download file
DS28EC20 Data Sheet	DS28EC20.pdf

Parametrics

Part Number	Applications	Memory Type	Memory Size	Bus Type	Package/Pins	Budgetary Price
Part Number	Applications	Memory Type	Memory Size	Bus Type	Package/Pins	See Notes
DS28EC20	Medical Consumable ID PCB ID and Authentication Peripheral ID and Control Print Cartridge Authentication	EEPROM	20K x 1	1-Wire	TO92/3 TSOC/6	$1.51 @1k

Design kits & evaluation modules

Quality and Environmental Data

DS28EC20.pdf

Ordering Information

Part Number	Status	Package	Temp	RoHS
DS28EC20+	Active	TO92,;3 pin;19.5 mm²	-40°C to +85°C	Lead Free
DS28EC20+T	Active	TO92,;3 pin;27.6 mm²	-40°C to +85°C	Lead Free
DS28EC20P+	Active	TSOC,;6 pin;17.8 mm²	-40°C to +85°C	Lead Free
DS28EC20P+T	Active	TSOC,;6 pin;17.8 mm²	-40°C to +85°C	Lead Free