SGS Thomson Microelectronics M35101 Datasheet

13.56 MHz, 2048-bit High Endurance EEPROM

■ 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 Auto-

Erase

■ 100,000 Erase/Write Cycles (minimum)

■ 40 Year Data Retention (minimum)

■ 5 ms Programming Time (typical)

M35101

Contactless Memory Chip

DATA BRIEFING

Antenna

(C20)

Antenna

(C30)

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% m odulation) 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 th e su bc arrier. The d at a tr a n sfe r ra te in each direction is 106 Kbit/second.

Table 1. Signal Names

AC1 Antenna Coil AC0 Antenna Coil

Wafer

Figure 1. Logic Diagram

M35101

Power

Supply

Regulator

2 Kbit

EEPROM

Demodulator

BPSK

Modulator

AC1

ASK

Load

AC0

AI02490

October 1999

Complete data available under NDA.

1/2

Table 2. Ordering Information Scheme

Example: M35101 - W4 / xxx

Delivery Form Transfer Code

W4 180 µm ± 15 µm unsawn wafer Given by ST S4 180 µm ± 15 µm sawn wafer C20 Antenna on Super 35 mm tape C30 Antenna on Super 35 mm tape

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 avai lable options (speed, package, etc.) or for further information on any aspect of this device, please contact the ST Sales Office nearest to you.

M35101

2/2