AT24RF08
Features
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Dual-Port Nonvolatile Memory - RFID and Serial
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Two-Wire Serial Interface:
– Compatible with AT24C08, and similar products fr om ot hers
– Supports standard byte and page read/write commands
– Programmable Access Protection to limit reads or writes from either port
– Coil connection detection
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RFID Interface:
– 125 kHz carrier frequency for long range access
– 2-wire connection to external coil antenna and tuning capacitor
– Multi-tag management to handle several tags in the field at once
– 11 RFID commands for tag control and memory read/write
– Ultra low power single bit write - 20
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Highly-Reliable EEPROM Memory
– 8K bits (1K bytes)
– Organized as 8 blocks of 128 bytes each
– 16-byte page write, 10ms write time
– Additional memory for access protection and ID number
– 10 years retention, 100K write cycle endurance
– -40° to +85° operation
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Standard 8-lead SOIC package
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2.4 to 5.5V Supply Voltage
Description
The chip functions as Dual Access EEPROM, with both a wired serial port and a wireless RFID
port used to acce ss the memor y. Acc ess permis sions ar e set fro m the seri al inte face side to
isolate blocks of memory from improper access depending on the situation. The RFID interface
is designed to be powered solely from the attached coil, permitting remote reads and writes of
the device.
Block Diagram
µµµµ
A
1K x 8
Dual Access
EEPROM with
RFID and Serial
Interfaces
AT24RF08
Pin Configurations
Pin Name Function
L1
L2 Coil Connection
PROT
GND Ground
SDA Serial Data,Open Drain I/O
SCL Serial Clock Input
WP Write Protect Input
Vcc Supply: 2.4 - 5.5V
Note: This is a summary document. For more information contact:
Kerry Maletsky at kmaletsky@atmel.com
Coil Connection
Protection Input
8-Pin SOIC
1072AS - 4/98 - 100
1
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