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Car Immobilizer
Access Control
Alarm Systems
Other Identification Systems
Read-only
Transponder
TK5530
Description
The TK5530 is a complete transponder, which implements all important functions for
immobilizer and identification systems. It consists of a plastic cube which accommo-
dates the read-only
IDentification Integral Circuit
(IDIC
脪
) e5530 and the antenna is
realized by a LC-circuit.
The identifying data are stored in a 128 bit PROM on the e5530, realized as an array
of laser-programmable fuses. The logic block diagram for the e5530 is shown in
Figure 1. The data are sent bit-serially as a code.
Any attempt to fake the base station with a wrong transponder will be recognized
immediately.
System Block Diagram
TK5530 Transponder
RF field
(e5530 + coil + C in plastic cube)
C
e5530
Power
Coil
Data
Base station
U2270B reader IC
MARC4 series 碌C
Rev. 4683A鈥揜FID鈥?2/03
1