MAX66140K-000AA+ Datasheet MAX66140K-000AA+, MAX66140E-000AA+ | P7-P9

MAX66140

ISO 15693-Compliant Secure Memory

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Figure 9. Downlink SOF for “1 Out of 256” Coding (Carrier Not Shown)

~ 9.44μs

~ 37.76μs ~ 37.76μs

~ 9.44μs

Figure 8. Downlink Data Coding (Case “1 Out of 4,” Carrier Not Shown)

PULSE POSITION "00"

PULSE POSITION "01" (1 = LSB)

PULSE POSITION "10" (0 = LSB)

PULSE POSITION "11"

~ 9.44μs ~ 9.44μs

~ 9.44μs

~ 75.52μs

~ 66.08μs

~ 28.32μs

~ 47.20μs

first half of the bit transmission time, switching to the

lower subcarrier for the second half. See Figure 13 for

details. The transmission of the SOF pattern takes the

same time as transmitting 4 bits (approximately 151µs

at a high data rate or approximately 604µs at a low data

rate). The SOF is distinct from any 4-bit data sequence.

The EOF pattern is equivalent to a SOF being transmit-

ted backwards. The exact duration of the SOF and EOF

varies slightly depending on the use of one or two sub-

carriers (Figures 14 and 15, respectively).

ABRIDGED DATA SHEET

MAX66140

ISO 15693-Compliant Secure Memory

10 ______________________________________________________________________________________

ABRIDGED DATA SHEET

Figure 10. Downlink SOF for “1 Out of 4” Coding (Carrier Not Shown)

~ 9.44μs

~ 37.76μs ~ 37.76μs

~ 9.44μs~ 9.44μs

Figure 11. Downlink EOF (Identical for Both Coding Schemes, Carrier Not Shown)

~ 9.44μs

~ 37.76μs

~ 9.44μs

Figure 12. Uplink Coding, Single Subcarrier Case (High Data-Rate Timing)

TRANSMITTING A ZERO

423.75kHz, ~ 18.88μs ~ 18.88μs

~ 37.76μs

TRANSMITTING A ONE

423.75kHz, ~ 18.88μs~ 18.88μs

~ 37.76μs

MAX66140

Figure 13. Uplink Coding, Two Subcarriers Case (High Data-Rate Timing)

TRANSMITTING A ZERO

484.28kHz, ~ 18.58μs423.75kHz, ~ 18.88μs

~ 37.46μs

TRANSMITTING A ONE

484.28kHz, ~ 18.58μs 423.75kHz, ~ 18.88μs

~ 37.46μs

Figure 14. Uplink SOF, Single Subcarrier Case (High Data-Rate Timing)

423.75kHz 423.75kHz

~ 56.64μs ~ 56.64μs ~ 37.76μs

Figure 15. Uplink SOF, Two Subcarriers Case (High Data-Rate Timing)

423.75kHz 423.75kHz484.28kHz484.28kHz

~ 55.75μs ~ 56.64μs ~ 37.46μs

ISO 15693-Compliant Secure Memory

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ABRIDGED DATA SHEET

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21

MAX66140K-000AA+

Mfr. #:

Buy MAX66140K-000AA+

Manufacturer:

Maxim Integrated

Description:

RFID Transponders RFID FOB 15693 ID 1K SECURE LF

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New from this manufacturer.

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MAX66140K-000AA+

MAX66140K-000AA+

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