M24LR64E-RDW6T/2 STMicroelectronics, M24LR64E-RDW6T/2 Datasheet - Page 45

• Manufacturer Part Number: M24LR64E-RDW6T/2
• Description: EEPROM 64Kbit EEProm 400kHz 13.56Mhz 1.8 to 5.5V
• Manufacturer: STMicroelectronics

Specifications of M24LR64E-RDW6T/2

• Rohs: yes
• Memory Size: 64 Kbit
• Organization: 8192 x 8
• Data Retention: 40 yr
• Maximum Clock Frequency: 400 kHz
• Maximum Operating Current: 20 uA
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 90 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-8
• Access Time: 900 ns
• Interface Type: I2C
• Minimum Operating Temperature: 0 C
• Operating Current: 20 uA
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 1.8 V

M24LR64E-R
8
Communication signal from VCD to M24LR64E-R
Communications between the VCD and the M24LR64E-R take place using the modulation
principle of ASK (Amplitude shift keying). Two modulation indexes are used, 10% and 100%.
The M24LR64E-R decodes both. The VCD determines which index is used.
The modulation index is defined as [a – b]/[a + b], where a is the peak signal amplitude, and
b the minimum signal amplitude of the carrier frequency.
Depending on the choice made by the VCD, a “pause” is created as described in
and
The M24LR64E-R is operational for the 100% modulation index or for any degree of
modulation index between 10% and 30% (see
Figure 14. 100% modulation waveform
The clock recovery shall be operational after t
Figure
105%
95%
60%
5%
15.
Amplitude
a
b
Carrier
Doc ID 022712 Rev 3
t
1
t
2
t
4
Communication signal from VCD to M24LR64E-R
4
t
max.
3
Table
124).
t
t
t
t
t
1
2
3
4
Min (µs)
ai15793
6,0
2,1
0
0
Figure 14
Max (µs)
9,44
4,5
0,8
t
1
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