DS28EC20 datasheet, PDF - EEWORLD Datasheet

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DS28EC20: Description20Kb 1-Wire EEPROM; File Size401KB，27 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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DS28EC20 Overview

20Kb 1-Wire EEPROM

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DS28EC20

20Kb 1-Wire EEPROM

GENERAL DESCRIPTION

The DS28EC20 is a 20480-bit,

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.

1-Wire

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

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

DS28EC20+T

-40°C to +85°C 3 TO-92, T&R

DS28EC20P+

-40°C to +85°C 6 TSOC

DS28EC20P+T -40°C to +85°C 6 TSOC, T&R

DS28EC20Q+T -40°C to +85°C 6 TDFN, T&R

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

PIN CONFIGURATION

TYPICAL OPERATING CIRCUIT

PUP

(300Ω

to 2.2kΩ)

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

19-6067; Rev 7; 9/17

DS28EC20 Related Products

	DS28EC20	DS2401P+T&R;	DS2417P+T&R;	DS2413P+T&R;	DS2502P-E48+T&R;	DS2505P+T&R;
Description	20Kb 1-Wire EEPROM	IC SILICON SERIAL NUMBER 6TSOC	IC RTC BINARY CNT SER 6-TSOC	IC ADDRESSABLE SWITCH 6TSOC	IC EPROM 1K 1WIRE 6TSOC	IC EPROM 16K 1WIRE 6TSOC
Installation type	-	surface mount	surface mount	surface mount	surface mount	surface mount
Package/casing	-	6-LSOJ (0.148", 3.76mm wide)	6-LSOJ (0.148", 3.76mm wide)	6-LSOJ (0.148", 3.76mm wide)	6-LSOJ (0.148", 3.76mm wide)	6-LSOJ (0.148", 3.76mm wide)
Supplier device packaging	-	6-TSOC	6-TSOC	6-TSOC	6-TSOC	6-TSOC

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