DS2506
64-kbit Add-Only Memory
www.dalsemi.com
FEATURES
PIN ASSIGNMENT
ꢀ 65536 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
PR-35
NC
1
8
NC
DALLAS
DS2506
NC
DATA
GND
2
3
4
7
6
5
NC
NC
NC
8-PIN SOIC
(208 mil)
ꢀ Built-in multidrop controller ensures
compatibility with other MicroLAN products
ꢀ EPROM partitioned into two hundred fifty six
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
1
2 3
Bottom View
See Mech.
Drawings Section
ꢀ 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
ORDERING INFORMATION
DS2506
PR35 Package
DS2506S
8-Pin SOIC Package
ꢀ Overdrive mode boosts communication speed
to 142 kbits per second
ꢀ 8-bit family code specifies DS2506
communications requirements to reader
ꢀ Presence detector acknowledges when the
reader first applies voltage
ꢀ Low cost PR35 or 8-pin SOIC 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
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062100
DALLAS [ DALLAS SEMICONDUCTOR ]
