M35101 Contactless Memory Chip 13.56 MHz, 2048-bit High Endurance EEPROM DATA BRIEFING ■ ISO 14443-2 Type-B Standard Compliant ■ 13.56 MHz Carrier Frequency ■ 847 kHz Subcarrier Frequency ■ 106 Kbit/second Data Transfer ■ Internal Tuning Capacitor ■ Data Modulation: – ASK from Reader to Card – BPSK from Card to Reader ■ 2048-bit EEPROM with Write Protect Feature ■ BYTE and PAGE READ (up to 16 Bytes) ■ BYTE and PAGE WRITE (up to 16 Bytes) ■ Self-Timed Programming Cycle with AutoErase ■ 100,000 Erase/Write Cycles (minimum) ■ 40 Year Data Retention (minimum) ■ 5 ms Programming Time (typical) DESCRIPTION The M35101 is a contactless memory, powered by the received carrier electromagnetic wave. It is a 2048-bit EEPROM, organised as 16 pages of 16 x 8 bits. The M35101 conforms to the ISO 14443-2 Type-B recommendation for the transfer of power and signals via radio transmission. The card reader circuitry amplitude modulates (10% modulation) the data on the carrier using amplitude shift keying (ASK). The card replies by load modulating the data on the carrier using bit phase shift keying (BPSK) of the subcarrier. The data transfer rate in each direction is 106 Kbit/second. Antenna (C20) Antenna (C30) Wafer Figure 1. Logic Diagram M35101 Power Supply Regulator 2 Kbit EEPROM Table 1. Signal Names AC1 Antenna Coil AC0 Antenna Coil October 1999 Complete data available under NDA. AC1 ASK Demodulator BPSK Load Modulator AC0 AI02490 1/2 M35101 Table 2. Ordering Information Scheme Example: M35101 - Delivery Form W4 180 µm ± 15 µm unsawn wafer S4 180 µm ± 15 µm sawn wafer C20 Antenna on Super 35 mm tape C30 Antenna on Super 35 mm tape W4 / xxx Transfer Code Given by ST ORDERING INFORMATION Devices are shipped from the factory with the memory content set at all ‘1’s (FFh). The notation used for the device number is as shown in Table 2. For a list of available options (speed, package, etc.) or for further information on any aspect of this device, please contact the ST Sales Office nearest to you. 2/2