H4001 Datasheet, PDF (5/5 Pages) EM Microelectronic - MARIN SA – READ-ONLY CONTACTLESS IDENTIFICATION DEVICE

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EM MICROELECTRONIC-MARIN SA
H4001
Control Logic
Two mask programmed versions of logic are available. The first one will modulate the amplitude of the magnetic field
with a bit rate corresponding to 64 periods of the field frequency (Manchester coding). The second version is using
half of the field frequency to transmit data by shifting the signal phase (PSK coding).
One of the coil terminals (COIL1 in Fig.6) is used to generate the clock signal for the logic. The output of the clock
extractor drives a sequencer providing all necessary signals to address the Memory Array, and serially output the
data.
PSK version
The serial data output of the Memory array connects the modulation control to the output or inverted output of a
flip-flop which input is the signal from the clock extractor.
When a logic 0 is output, the modulation control signal is changed to the other output of the flip-flop, and when a logic
1 is output, the modulation control signal remains on the same flip-flop output.
Data Modulator
The data modulator is controlled by the signal Modulation Control (see above fig. 4 & 5) in order to induce a high
current on COIL_2 terminal when this signal is at logic 0. This will affect the magnetic field according to the data
stored in the Memory Array.
Package Information
PCB
4.0 mm
1.0 mm
1206
EM
DIP 8 / SO8
COIL1
H4001
COIL2
*
* Max. thickness depending on utilized capacitor
Ordering Information
The H4001 is available in the following packages
Fig. 7
DIP 8-pin package H4001 8P
SO 8-pin package H4001 8S
PCB 2 connections H4001 PCB
Chip form and others on request
EM Microelectronic-Marin SA cannot assume responsibility for use of any circuitry described other than circuitry entirely embodied
in an EM Microelectronic-Marin SA product. EM Microelectronic-Marin SA reserves the right to change the circuitry and specifica-
tions without notice at any time. You are strongly urged to ensure that the information given has not been superseded by a more
up-to-date version.
© 1996 EM Microelectronic-Marin SA 3/96 Rev. E/127
EM Microelectronic-Marin SA CH-2074 Marin, Switzerland,Tel. [phone], Fax [phone]
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