DS2505 Datasheet, PDF (1/24 Pages) Dallas Semiconductor – 16-kbit Add-Only Memory

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FEATURES
 16384 bits 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 +
48-bit serial number + 8-bit CRC tester)
assures absolute traceability because no two
parts are alike
 Built-in multidrop controller ensures
compatibility with other 1-Wire Net
products
 EPROM partitioned into sixty-four 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
 Architecture allows software to patch data by
superseding an old page in favor of a newly
programmed page
 Reduces control, address, data, power, and
programming signals to a single data pin
 Directly connects to a single port pin of a
microprocessor and communicates at up to
16.3 kbits per second
 8-bit family code specifies DS2505
communications requirements to reader
 Presence detector acknowledges when the
reader first applies voltage
 Low cost TO-92 or 6-pin TSOC surface
mount package
 Reads over a wide voltage range of 2.8V to
6.0V from -40°C to +85°C; programs at
11.5V to 12.0V from -40°C to +50°C
DS2505
16Kb Add-Only Memory
PIN ASSIGNMENT
TO-92
TSOC PACKAGE
DALLAS
DS2505
GND ¹
DATA ²
NC ³
6 _NC
5 _NC
4 _NC
Top View
3.7 X 4.0 X 1.5 mm
Side View
See Mech.
Drawing Section
123
Bottom View
NOTE: The leads of TO-92 packages on tape-
and-reel are formed to approximately 100 mil
(2.54 mm) spacing. For details see the Package
Information section.
ORDERING INFORMATION
DS2505
TO-92 Package
DS2505/T&R TO-92 Package, Tape & Reel
DS2505P
TSOC Package
DS2505P/T&R TSOC Package, Tape & Reel
DS2505+
TO-92 Package
DS2505+T&R TO-92 Package, Tape & Reel
DS2505P+
TSOC Package
DS2505P+T&R TSOC Package, Tape & Reel
+ Denotes a lead(Pb)-free/RoHS-compliant
package.
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
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