MAX66120 19-5623 Rev 0 11/10 ISO 15693-Compliant 1Kb Memory Fob General Description Features The MAX66120 combines 1024 bits of user EEPROM, a Fully Compliant with ISO 15693 and ISO 18000-3 64-bit unique identifier (UID), and a 13.56MHz ISO Mode 1 Standard 15693 RF interface in a plastic key fob. The memory is 13.56MHz 7kHz Carrier Frequency organized as 16 blocks of 8 bytes plus two more blocks 1024-Bit User EEPROM with Block Lock Feature, for data and control registers. Each block has a user- Write-Cycle Counter, and Optional EPROM- readable write-cycle counter. Four adjacent user Emulation Mode EEPROM blocks form a memory page (pages 0 to 3). Memory protection features are write protection and 64-Bit UID EPROM emulation, which the user can set for each indi- Read and Write (64-Bit Block) vidual memory page. The MAX66120 supports all ISO Supports AFI and DSFID Function 15693-defined data rates, modulation indices, subcarri- er modes, the selected state, application family identifier 10ms Programming Time (AFI), data storage format identifier (DSFID), and the To Fob: 10% or 100% ASK Modulation Using 1/4 Option flag bit for read operations. Memory write (26kbps) or 1/256 (1.6kbps) Pulse-Position Coding access is accomplished through standard ISO 15693 From Fob: Load Modulation Using Manchester memory and control function commands. Coding with 423kHz and 484kHz Subcarrier in Low Applications (6.6kbps) or High (26kbps) Data-Rate Mode 200,000 Write/Erase Cycles (Minimum) Driver Identification (Fleet Application) 40-Year Data Retention (Minimum) Access Control Compatible with Existing 1Kb ISO 15693 Products Asset Tracking on the Market Supports the Option Flag for Read Operations Ordering Information Powered Entirely Through the RF Field PART TEMP RANGE PIN-PACKAGE Operating Temperature: -25C to +50C MAX66120K-000AA+ -25C to +50C Key Fob +Denotes a lead(Pb)-free/RoHS-compliant package. Key Fob Mechanical Drawing appears at end of data sheet. Typical Operating Circuit 13.56MHz READER MAGNETIC COUPLING MAX66120 TX OUT IC LOAD TRANSMITTER SWITCHED LOAD RX IN ANTENNA Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLEISO 15693-Compliant 1Kb Memory Fob ABSOLUTE MAXIMUM RATINGS Maximum Incident Magnetic Field Strength ..........141.5dBA/m Relative Humidity..............................................(Water Resistant) Operating Temperature Range ...........................-25C to +50C Storage Temperature Range ...............................-25C to +50C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (T = -25C to +50C.) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS EEPROM Programming Time t (Note 2) 9 10 ms PROG Endurance N At +25C (Note 3) 200,000 Cycles CYCLE Data Retention t (Note 4) 40 Years RET RF INTERFACE Carrier Frequency f (Notes 1, 5) 13.553 13.560 13.567 MHz C Activation Field Strength H At 25C (Note 2) 122.0 dBA/m MIN Write Field Strength H At 25C (Note 2) 122.4 dBA/m WR Maximum Field Strength H At 25C (Note 2) 137.5 dBA/m MAX Power-Up Time t (Notes 2, 6) 1.0 ms POR Note 1: System requirement. Note 2: Guaranteed by simulation not production tested. Note 3: Write-cycle endurance is degraded as T increases. Not 100% production tested guaranteed by reliability monitor sampling. A Note 4: Guaranteed by 100% production test at elevated temperature for a shorter time equivalence of this production test to data sheet limit at operating temperature range is established by reliabiliity testing. Note 5: Production tested at 13.56MHz only. Note 6: Measured from the time at which the incident field is present with strength greater than or equal to H to the time at (MIN) which the MAX66120s internal power-on reset signal is deasserted and the device is ready to receive a command frame. Not characterized or production tested guaranteed by simulation only. Overview Detailed Description Figure 1 shows the relationships between the major The MAX66120 combines 1024 bits of user EEPROM, control and memory sections of the MAX66120. The 128 bits of user and control registers, a 64-bit unique device has three main data components: 1) 64-bit UID, identifier (UID), and a 13.56MHz ISO 15693 RF inter- 2) four 256-bit pages of user EEPROM, and 3) two 8- face in a single key fob. The memory is organized as 18 byte blocks of user and control registers. Figure 2 blocks of 8 bytes each. Each block has a user-readable shows the applicable ISO 15693 commands and their write-cycle counter. Four adjacent user EEPROM purpose. The network function commands allow the blocks form a memory page (pages 0 to 3). Memory master to identify all slaves in its range and to change protection features include write protection and EPROM their state, e.g., to select one for further communication. emulation, which the user can set for each individual The protocol required for these network function com- memory page. The memory of the MAX66120 is mands is described in the Network Function accessed through the standard ISO 15693 memory and Commands section. The memory and control functions control function commands. The data rate can be as access the memory of the MAX66120 for reading and high as 26.69kbps. The MAX66120 supports AFI and writing. The protocol for these memory and control DSFID. Applications of the MAX66120 include driver function commands is described in the Memory and identification (fleet application), access control, and Control Function Commands section. All data is read asset tracking. and written least significant bit (LSb) first, starting with the least significant byte (LSB). 2 MAX66120