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H40018S Datasheet(PDF) 5 Page - EM Microelectronic - MARIN SA |
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H40018S Datasheet(HTML) 5 Page - EM Microelectronic - MARIN SA |
5 / 5 page 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. Ordering Information The H4001 is available in the following packages DIP 8-pin package Chip form and others on request SO 8-pin package PCB 2 connections 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 You are strongly urged to ensure that the information given has not been superseded by a more up-to-date version. 5 Package Information DIP 8 / SO8 H4001 COIL1 COIL2 Fig. 7 4.0 mm 1.0 mm * * Max. thickness depending on utilized capacitor 1206 E M PCB H4001 8P H4001 8S H4001 PCB © 1996 EM Microelectronic-Marin SA 3/96 Rev. E/127 EM Microelectronic-Marin SA CH-2074 Marin, Switzerland,Tel. +41 32 755 51 11, Fax +41 32 755 54 03 H4001 ® EMMICROELECTRONIC-MARINSA |
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