DS8005 Maxim, DS8005 Datasheet
DS8005
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DS8005 Summary of contents
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... Rev 0; 4/10 General Description The DS8005 dual smart card interface is a low-cost, dual analog front-end for an IC card reader interface that needs to communicate with two smart cards in a mutually exclusive fashion. The analog interface is designed for use in ISO 7816, EMV cations. The device is functionally similar to two DS8024s with external multiplexing to select the active interface, but also includes low power and 1 ...
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... Relative to GND.......................................-0. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...
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RECOMMENDED DC OPERATING CONDITIONS (continued +3.3V +5.0V +25°C, unless otherwise noted. All specifications apply to the device, unless otherwise noted in DD DDA A the CONDITIONS column.) (Note 1) PARAMETER CLOCK SOURCE Crystal Frequency ...
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... Card-Active Mode Output Current Shutdown Current Threshold Slew Rate DATA LINES (I/O_ AND I/OIN) I/O_ I/OIN Falling Edge Delay Pullup Pulse Active Time Maximum Frequency Input Capacitance I/OA AND I/OB PINS Output Low Voltage Output Current Card-Inactive Mode Internal Pullup Resistor Output Low Voltage Output High ...
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RECOMMENDED DC OPERATING CONDITIONS (continued +3.3V +5.0V +25°C, unless otherwise noted. All specifications apply to the device, unless otherwise noted in DD DDA A the CONDITIONS column.) (Note 1) PARAMETER Input Low Current Input ...
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... DD_IC Note 3: Stop mode is enabled by setting CMDVCC, 5V/3V, and 1_8V to a logic-high. Note 4: Parameters are guaranteed to meet all ISO 7816, GSM11-11, and EMV 2000 requirements. For the 1.8V card, the maximum rise and fall time is 10ns. Note 5: Parameter is guaranteed to meet all ISO 7816, GSM11-11, and EMV 2000 requirements. For the 1.8V card, the minimum slew rate is 0.05V/µ ...
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... Smart Card Data-Line Output, Interface A. Card data communication line, contact C7. This pin is 11 I/OA only active if the first card interface is selected (SEL_AB low) and the interface has gone through an activation sequence. _______________________________________________________________________________________ Smart Card Interface CCB DS8005 6 23 DDA RSTIN 10 19 CMDVCC I/ I/ ...
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Smart Card Interface PIN NAME Smart Card Data-Line Output, Interface B. Card data communication line, contact C7. This pin is 12 I/OB only active if the second card interface is selected (SEL_AB high) and the interface has gone through an ...
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... OFF OFF2 Figure 1. Functional Diagram Detailed Description The DS8005 is an analog front-end for communicating with 1.8V, 3V, and 5V dual smart cards dual input-voltage device, requiring one supply to match that of a host microcontroller and a separate +5V sup- ply for generating correct smart card supply voltages. ...
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Smart Card Interface Voltage Supervisor The voltage supervisor monitors the V 220µs reset pulse ( used internally to keep the W device inactive during power-on or power-off of the V supply. See Figure 2. DD The IC card ...
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... Current to and from the card I/O lines is limited internally to 15mA. The maximum frequency on these lines is 1MHz. Inactive Mode The device powers up with the card interface in the inactive mode. Minimal circuitry is active while waiting for the host to initiate a smart card session. ...
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... An internal overload detector triggers at approxi- mately 120mA. Current samples to the detector are fil- tered. This allows spurious current pulses (with a duration of a few µ 200mA to be drawn without causing deactivation. The average current must stay below the specified maximum current value. To main tain V CC ESR < ...
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CMDVCC V CC_ I/O_ CLK_ RSTIN RST_ I/OIN Figure 4. Activation Sequence CMDVCC RST_ CLK_ I/O_ V CC_ t 10 Figure 5. Deactivation Sequence ______________________________________________________________________________________ Smart Card Interface 200ns ...
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Smart Card Interface PRES_ OFF_ CMDVCC DEBOUNCE V CC_ Figure 6. Behavior of PRES_, OFF_, CMDVCC, and V OFF_ PRES_ RST_ CLK_ I/O_ V CC_ t 10 Figure 7. Emergency Deactivation Sequence (Card Extraction) 14 ______________________________________________________________________________________ DEBOUNCE DEACTIVATION CAUSED BY ...
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Stop Mode (Low-Power Mode) A low-power state, stop mode, can be entered by forc- ing the CMDVCC, 5V/3V, and 1_8V input pins to a logic-high state. Stop mode can only be entered when the smart card interface is inactive. In ...
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Smart Card Interface Smart Card Power Select The device supports three smart card V 1.8V, 3V, and 5V. The power select is controlled by the 1_8V and 5V/3V signals as shown in Table 3. The 1_8V signal has priority over ...
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... SEL_AB, OFF, and OFF2 pins with regard to card presence. REG A V CCA TRANSPARENT CLKA DIV CLKA LATCH A RSTA, I/OA, GNDA ENA REG B V CCB TRANSPARENT CLKB DIV CLKB LATCH B RSTB, I/OB, GNDB ENA SMART CARD 1 PRESA STATUS 1 SMART CARD 0 PRESB STATUS DS8005 17 ...
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... With all these layout precautions, noise should be kept to an acceptable level and jitter on C3 (CLK_) should be lines sepa- less than 100ps. Reference layouts are available on DDA request. For technical support ic.com/micro should be CC_ and V separately. If two supplies DDA DD Technical Support https://support.maxim- ...
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... OFF2 GPIO *PLACE A 100nF CAPACITOR CLOSE TO THE DS8005 AND PLACE A 220nF CAPACITOR CLOSE TO CARD CONTACT. For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status ...
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... Initial release Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...