Electronic Components Datasheet Search |
|
73S8024RN Datasheet(PDF) 9 Page - Teridian Semiconductor Corporation |
|
73S8024RN Datasheet(HTML) 9 Page - Teridian Semiconductor Corporation |
9 / 27 page DS_8024RN_020 73S8024RN Data Sheet Rev. 1.8 9 4 Card Power Supply The card power supply is internally provided by the LDO regulator, and controlled by the digital ISO-7816-3 sequencer. Card voltage selection is carried out by the digital input 5V/ #V. Choice of the VCC Capacitor: Depending on the applications, the requirements in terms of both VCC minimum voltage and transient currents that the interface must be able to provide to the card are different. An external capacitor must be connected between the VCC pin and to the card ground in order to guarantee stability of the LDO regulator, and to handle the transient requirements. The type and value of this capacitor can be optimized to meet the desired specification. Table 1 shows the recommended capacitors for each VPC power supply configuration and applicable specification. Table 1: Choice of VCC Pin Capacitor Specification Requirements System Requirements Specification Min VCC Voltage Allowed During Transient Current Max Transient Current Charge Min VPC Power Supply Required Capacitor Type Capacitor Value EMV 4.0 4.6V 30nA.s 4.75V X5R/X7R w/ ESR < 100m Ω 3.3 μF ISO-7816-3 4.5V 20nA.s 4.75V 1 μF NDS 4.6V 40nA.s 4.85V 1 μF Note: Capacitor value for NDS implementation is also defined by the deactivation time requirement. 5 Over-Temperature Monitor A built-in detector monitors die temperature. Upon an over-temperature condition, a card deactivation sequence is initiated, and an error or fault condition is reported to the system controller. 6 On-Chip Oscillator and Card Clock The 73S8024RN device has an on-chip oscillator that can generate the smart card clock using an external crystal (connected between the pins XTALIN and XTALOUT) to set the oscillator frequency. When the clock signal is available from another source, it can be connected to the pin XTALIN, and the pin XTALOUT should be left unconnected. The card clock frequency may be chosen between four different division rates, defined by digital inputs CLKDIV 1 and CLKDIV 2, as per Table 2. Table 2: Card Clock Frequency CLKDIV1 CLKDIV2 CLK 0 0 ⅛ XTALIN 0 1 ¼ XTALIN 1 0 XTALIN 1 1 ½ XTALIN Card power down mode (card clock STOP) is supported and is controllable through the dedicated digital inputs CLKSTOP and CLKLEV (not supported in the 20QFN package). |
Similar Part No. - 73S8024RN |
|
Similar Description - 73S8024RN |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |