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DS28EC20
20Kb 1-Wire EEPROM
GENERAL DESCRIPTION
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
Device Authentication
IEEE 1451.4 Sensor TEDS
Ink/Toner Cartridges
Medical Sensors
PCB Identification
Wireless Base Stations
ORDERING INFORMATION
PART TEMP RANGE PIN-PACKAGE
DS28EC20+ -40°C to +85 ° C 3 TO-92
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
? Operating Range: 3.3V ±5%, 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
PIN CONFIGURATION
DS28EC20+T
-40°C to +85 ° C
3 TO-92, T&R
DS28EC20P+
-40°C to +85 ° C
6 TSOC
28EC20
TO-92
DS28EC20P+T -40°C to +85 ° C 6 TSOC, T&R
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
PIN 1 ---------- GND
PIN 2 ---------- I/O
PIN 3 ---------- N.C.
1 2 3
1 2 3
PIN 1 ---------- N.C.
PIN 2 ---------- I/O
PIN 3 ---------- GND
PIN 4, 5, 6 ---- N.C.
TYPICAL OPERATING CIRCUIT
V CC
R PUP (300 ?
to 2.2k ? )
PX.Y I/O
DS28EC20
μC
GND
Commands, bytes, and modes are capitalized for clarity.
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
1 of 27
1
2
3
FOR TAPE-AND-
REEL THE LEADS
ARE FORMED TO
100 MILS (2.54mm)
SPACING VERSUS
50 MILS (1.27mm)
FOR BULK.
BOTTOM VIEW
TSOC, Top View
6
5
4
19-6067; Rev 5; 9/13
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相关代理商/技术参数
DS28EC20-224-BB+
制造商:Maxim Integrated Products 功能描述:- Rail/Tube
DS28EC20P
制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:DS28EC20_1203
DS28EC20P T
制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:DS28EC20_1203
DS28EC20P+
功能描述:电可擦除可编程只读存储器 20Kb 1-Wire 电可擦除可编程只读存储器 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
DS28EC20P+T
功能描述:电可擦除可编程只读存储器 20Kb 1-Wire 电可擦除可编程只读存储器 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
DS28EC20P-224-BB+T
制造商:Maxim Integrated Products 功能描述:- Tape and Reel
DS28EC20Q-A5A-5A+T
制造商:Maxim Integrated Products 功能描述:20KB 1-WIRE EEPROM - Tape and Reel
DS28EC20Q-A5A-5A+W
制造商:Maxim Integrated Products 功能描述:20KB 1-WIRE EEPROM - Rail/Tube