Rainbow Electronics DS2505 - Manual

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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
PIN ASSIGNMENT
ORDERING INFORMATION
DS2505 TO-92 Package
DS2505P 6-pin TSOC Package
DS2505/T&R Tape & Reel version of DS2505
DS2505P/T&R Tape & Reel version of DS2505P
Top View
3.7 X 4.0 X 1.5 mm
DATA
1
2
3
6
5
4
Side View
See Mech.
Drawing Section
TSOC PACKAGE
GND
NC NC
NC
NC
DS2505
16-kbit Add-Only Memory
www.dalsemi.com
GND
D
A
TA
N
C
Bottom View
See Mech.
Drawings Section
TO-92
DALLAS
DS2505
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