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MAX66000K bảng dữ liệu(PDF) 2 Page - Maxim Integrated Products |
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MAX66000K bảng dữ liệu(HTML) 2 Page - Maxim Integrated Products |
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2 / 21 page ![]() ISO/IEC 14443 Type B-Compliant 64-Bit UID 2 _______________________________________________________________________________________ Detailed Description The MAX66000 combines a 64-bit UID and a 13.56MHz RF interface (ISO/IEC 14443 Type B, Parts 2-4) in a single chip. The UID can be read through the ISO/IEC 14443-4 block transmission protocol, where requests and responses are exchanged through I- blocks once a device is in the ACTIVE state. The read- er must support a frame size of at least 19 bytes. The data rate can be as high as 847.5kbps. The MAX66000 supports AFI and CID. ISO 14443 functions not sup- ported are chaining, frame-waiting time extension, and power indication. Applications of the MAX66000 include driver identification (fleet application), access control, and asset tracking. Overview Figure 1 shows the relationships between the major control and memory sections of the MAX66000. Figure 2 shows the hierarchical structure of the ISO/IEC 14443 Type B-compliant access protocol. The master must first apply network function commands to put the MAX66000 into the ACTIVE state to read the UID or system information. The protocol required for these net- work function commands is described in the Network Function Commands section. Once the MAX66000 is in the ACTIVE state, the master can use the memory func- tion commands. Upon completion of such a command, the MAX66000 returns to the ACTIVE state and the master can issue another memory function command or deselect the device, which returns it to the HALT state. The protocol for these commands is described in the Memory Commands section. All data is read and writ- ten least significant bit (LSb) first, starting with the least significant byte (LSB). ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (TA = -25°C to +50°C.) (Note 1) 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. Note 1: System requirement. Note 2: Measured from the time at which the incident field is present with strength greater than or equal to H(MIN) to the time at which the MAX66000’s 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. Maximum Incident Magnetic Field Strength ..........141.5dBµA/m Operating Temperature Range ...........................-25°C to +50°C Relative Humidity ..............................................(Water Resistant) Storage Temperature Range ...............................-25°C to +50°C PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS RF INTERFACE Carrier Frequency fC (Note 1) 13.553 13.560 13.567 MHz At +25°C, MAX66000E 111.0 137.5 Operating Magnetic Field Strength (Note 1) H At +25°C, MAX66000K 123.5 137.5 dBμA/m Power-Up Time tPOR (Note 2) 1.0 ms RF FRONT- END VOLTAGE REGULATOR INTERNALSUPPLY UID, AFI, APPLICATION DATA FIELD ISO 14443 FRAME FORMATTING AND ERROR DETECTION fc DATA MODULATION Figure 1. Block Diagram |
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