M24LR04E-RDW6T/2 STMicroelectronics, M24LR04E-RDW6T/2 Datasheet - Page 44

• Manufacturer Part Number: M24LR04E-RDW6T/2
• Description: EEPROM 4-Kbit Dual EEPROM 1.8 to 5.5V 13.56Mhz
• Manufacturer: STMicroelectronics

Specifications of M24LR04E-RDW6T/2

• Product Category: EEPROM
• Memory Size: 4 Kbit
• Maximum Clock Frequency: 400 KHz
• Maximum Operating Current: 20 uA
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-8
• Factory Pack Quantity: 1

RF device operation
7.3
7.3.1
7.3.2
7.3.3
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Initial dialog for vicinity cards
The dialog between the vicinity coupling device or VCD (commonly the “RF reader”) and the
vicinity integrated circuit card or VICC (M24LR04E-R) takes place as follows:
These operations use the RF power transfer and communication signal interface described
below (see
(Reader talk first).
Power transfer
Power is transferred to the M24LR04E-R by radio frequency at 13.56 MHz via coupling
antennas in the M24LR04E-R and the VCD. The RF operating field of the VCD is
transformed on the M24LR04E-R antenna to an AC voltage which is rectified, filtered and
internally regulated.
During communications, the amplitude modulation (ASK) on this received signal is
demodulated by the ASK demodulator.
Frequency
The ISO 15693 standard defines the carrier frequency (f
13.56 MHz ±7 kHz.
Operating field
The M24LR04E-R operates continuously between the minimum and maximum values of the
electromagnetic field H defined in
limits.
activation of the M24LR04E-R by the RF operating field of the VCD,
transmission of a command by the VCD,
transmission of a response by the M24LR04E-R.
Power
transfer,
Frequency
Doc ID 022208 Rev 5
Table
and
123. The VCD has to generate a field within these
Operating
field). This technique is called RTF
C
) of the operating field as
M24LR04E-R