M24LR04E-RDW6T/2 STMicroelectronics, M24LR04E-RDW6T/2 Datasheet - Page 52

• 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

Communication signal from M24LR04E-R to VCD
10
10.1
10.2
10.3
52/142
Communication signal from M24LR04E-R to VCD
The M24LR04E-R has several modes defined for some parameters, owing to which it can
operate in various noise environments and meet various application requirements.
Load modulation
The M24LR04E-R is capable of communication to the VCD via an inductive coupling area
whereby the carrier is loaded to generate a subcarrier with frequency f
generated by switching a load in the M24LR04E-R.
The load-modulated amplitude received on the VCD antenna must be of at least 10 mV
when measured as described in the test methods defined in International Standard
ISO10373-7.
Subcarrier
The M24LR04E-R supports the one-subcarrier and two-subcarrier response formats. These
formats are selected by the VCD using the first bit in the protocol header. When one
subcarrier is used, the frequency f
When two subcarriers are used, the frequency f
is 484.28 kHz (f
continuous phase relationship between f
Data rates
The M24LR04E-R can respond using the low or the high data rate format. The selection of
the data rate is made by the VCD using the second bit in the protocol header. For fast
commands, the selected data rate is multiplied by two.
rates produced by the M24LR04E-R using the different response format combinations.
Table 20.
High
Low
Standard commands
Fast commands
Standard commands
Fast commands
Data rate
Response data rates
C
/28). When using the two-subcarrier mode, the M24LR04E-R generates a
Doc ID 022208 Rev 5
S1
13.24 Kbit/s (f
of the subcarrier load modulation is 423.75 kHz (f
6.62 Kbit/s (f
26.48 Kbit/s (f
52.97 Kbit/s (f
One subcarrier
S1
and f
S1
S2
c
c
/2048)
c
c
/1024)
/512)
/256)
is 423.75 kHz (f
.
Table 20
shows the different data
C
6.67 Kbit/s (f
26.69 Kbit/s (f
/32), and frequency f
Two subcarriers
not applicable
not applicable
S
. The subcarrier is
M24LR04E-R
c
/2032)
c
/508)
C
/32).
S2