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102099

SPECIAL FEATURES

§ 1024 bits, 16 kbits or 64 kbits Electrically

Programmable Read Only Memory (EPROM)

communicates with the economy of one

signal plus ground

§ Unique, factory-lasered and tested 64-bit

registration number (8-bit family code, 36-bit

serialization, 12-bit UniqueWare identifier

5E7H, 8-bit CRC-tester) assures absolute

traceability because no two parts are alike.

§ Built-in multidrop controller ensures

compatibility with other MicroLAN products

§ EPROM partitioned into 256-bit pages for

randomly accessing packetized data records

§ Each memory page can be permanently write-

protected to prevent tampering

§ Device is an “add only” memory where

additional data can be programmed into

EPROM without disturbing existing data

§ Reduces control, address, data, power and

programming signals to a single pin

§ Directly connects to a single port pin of a

microprocessor and communicates at up to

16.3k bits per second

§ Presence detector acknowledges when reader

first applies voltage

§ Low cost TO-92/PR-35 or 8-pin SOIC and

TSOC surface mount packages

§ Reads over a wide voltage range of 2.8V to

6.0V from -40°C to +85°C

PIN ASSIGNMENT

PIN ASSIGNMENT

TO-92/PR-35

TSOC

SOIC

Pin 1

Ground

Ground

NC

Pin 2

Data

Data

NC

Pin 3

NC

NC

Data

Pin 4

-----

NC

Ground

Pins 5 to 8

-----

NC

NC

SILICON LABEL DESCRIPTION

UniqueWare Add-Only Memories are factory programmed versions of the DS2502 (1024 bit), the

DS2505 (16-kbit) and the DS2506 (64k bit) Add-Only Memories, respectively. They differ from the

regular devices in their custom ROM family codes (see Ordering Information) and the UniqueWare

Identifier 5E7 in place of the upper 12 bits of the standard serialization field. For technical details on the

devices please refer to the DS2502, DS2505 and DS2506 data sheets.

UniqueWare Add-Only Memories are only available preprogrammed with customer-specific and write-

protected data. UniqueWare data fills at least one but no more than the first four pages of a device,

DS2502/5/6-UNW

UniqueWare

www.dalsemi.com

8

7

6

5

1

2

3

4

8-Pin SOIC

1

2

3

6

5

4

TOP VIEW

3.7 X 4.0 X 1.5 mm

TSOC PACKAGE

See Mech.

Drawings Section

See Mech.

Drawings Section

TO-92/PR-35

BOTTOM VIEW

See Mech.

Drawings Section

2 3

1