DS2502P-UNW Maxim Integrated Products, Inc., DS2502P-UNW Datasheet
DS2502P-UNW
Manufacturer Part Number
DS2502P-UNW
Description
Ds2502-unw, Ds2502p-unw, Ds2502s-unw, Ds2505-unw, Ds2505p-unw, Ds2506-unw, Uniqueware Add-only Memory
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.DS2502P-UNW.pdf
(3 pages)
SPECIAL FEATURES
§ 1024 bits, 16 kbits or 64 kbits Electrically
§ Unique, factory-lasered and tested 64-bit
§ Built-in multidrop controller ensures
§ EPROM partitioned into 256-bit pages for
§ Each memory page can be permanently write-
§ Device is an “add only” memory where
§ Reduces control, address, data, power and
§ Directly connects to a single port pin of a
§ Presence detector acknowledges when reader
§ Low cost TO-92/PR-35 or 8-pin SOIC and
§ Reads over a wide voltage range of 2.8V to
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,
www.dalsemi.com
Programmable Read Only Memory (EPROM)
communicates with the economy of one
signal plus ground
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.
compatibility with other MicroLAN products
randomly accessing packetized data records
protected to prevent tampering
additional data can be programmed into
EPROM without disturbing existing data
programming signals to a single pin
microprocessor and communicates at up to
16.3k bits per second
first applies voltage
TSOC surface mount packages
6.0V from -40°C to +85°C
UniqueWare
1 of 3
PIN ASSIGNMENT
PIN ASSIGNMENT
Pin 1
Pin 2
Pin 3
Pin 4
Pins 5 to 8 -----
Drawings Section
BOTTOM VIEW
See Mech.
TO-92/PR-35
1
2 3
TM
TO-92/PR-35 TSOC
Ground
Data
NC
-----
Add-Only Memory
DS2502/5/6-UNW
TSOC PACKAGE
Drawings Section
3.7 X 4.0 X 1.5 mm
Drawings Section
Ground
Data
NC
NC
NC
8-Pin SOIC
See Mech.
TOP VIEW
See Mech.
1
2
3
4
1
2
3
6
5
4
8
7
6
5
SOIC
NC
NC
Data
Ground
NC
102099
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DS2502P-UNW Summary of contents
Page 1
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 ...
Page 2
... Extension ID Value LSB MSB 3 bytes constant 3 bytes serialization assigned by IEEE DS2502/5/6-UNW Ordering Part Number DS2502-UNW-pppp DS2502S-UNW-pppp DS2502P-UNW-pppp DS2505-UNW-pppp DS2505P-UNW-pppp DS2506-UNW-pppp DS2506S-UNW-pppp Project ID LSB MSB LSB 4 bytes constant low address ...
Page 3
SAMPLE 2: EUI-64 FireWire (unused) CRC16 MSB LSB MSB 17 bytes 2 bytes FFH high address PHYSICAL ADDRESS AND DATA MAPPING Figure 2b ADDRESS DATA CRC16, value depends on actual data ...