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DS28E04-100

4096-Bit Addressable 1-Wire EEPROM with PIO

Maxim Integrated 

19-6134; Rev 12/11

DS28E04-100

4096-Bit Addressable 1-Wire EEPROM with PIO

GENERAL DESCRIPTION

The DS28E04-100 is a 4096-bit, 1-Wire® EEPROM

chip with seven address inputs. The address inputs

are directly mapped into the 1-Wire 64-bit Device ID

Number to easily enable the host system to identify

the physical location or functional association of the

DS28E04-100 in a multidevice 1-Wire network en-

vironment. The 4096-bit EEPROM array is configured

as 16 pages of 32 bytes with a 32 byte scratchpad to

perform write operations. EEPROM memory pages

can be individually write protected or put in EPROM-

emulation mode, where bits can only be changed

from a 1 to a 0 state. In addition to the memory, the

DS28E04-100 has two general-purpose I/O ports that

can be used for input or to generate level and/or

pulse outputs. Activity registers also capture port

activity for state change monitoring. The DS28E04-

100 communicates over the single-contact 1-Wire

bus. The communication follows the standard Maxim

1-Wire protocol.

APPLICATIONS

Autoconfiguration of Modular Systems such as

Central-Office Switches, Cellular Base Stations,

Access Products, Optical Network Units, and

PBXs

Accessory/PCB Identification

TYPICAL OPERATING CIRCUIT

VCC

RPUP

FEATURES

• 4096 bits of EEPROM Memory Partitioned into

16 Pages of 256 Bits

• Seven Address Inputs for Physical Location

Configuration

• Two General-Purpose PIO Pins with Pulse-

Generation Capability

 Individual Memory Pages can be Permanently

Write-Protected or put in OTP EPROM-

Emulation Mode (“Write to 0”)

 Communicates to Host with a Single Digital

Signal at 15.3kbps or 111kbps Using 1-Wire

Protocol

 Parasitic or VCC Powered

 Conditional Search Based on PIO Status or PIO

Activity

 Switchpoint Hysteresis and Filtering to Optimize

Performance in the Presence of Noise

 Reads and Writes Over a Wide 2.8V to 5.25V

Voltage Range from -40°C to +85°C

 16-Pin, 150-mil SO Package

ORDERING INFORMATION

PART

TEMP RANGE PIN-PACKAGE

DS28E04S-100+ -40°C to +85°C 16 SO

DS28E04S-100+T

-40°C to +85°C

16 SO

(2.5k pieces)

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

T = Tape and reel.

PIN CONFIGURATION

PX.Y

µC

LED

IO VCC A6

POL

P1

P0

GND A0

DS28E04 #1

IO VCC A6

POL

P1

P0

GND A0

RST1 RST0 DS28E04 #7

SO (150 mils)

Commands, Registers, and Modes are capitalized for

clarity.

1-Wire is a registered trademark of Maxim Integrated Products, Inc.

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