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Smartcard interface
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The ST8024 is a complete low cost analog interface for asynchronous 3 V and 5 V smart cards. It can be placed between the card and the microcontroller with few external components to perform all supply protection and control functions. ST8024 is a direct replacement of ST8004.

Main applications are: smartcard readers for settop- box, IC card readers for banking, identification, pay TV.

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Errata Sheet
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Key Features

  • Designed to be compatible with the NDS conditional access system
  • IC card interface
  • 3 or 5 V supply for the IC (VDD and GND)
  • Three specifically protected half-duplex bidirectional buffered I/O lines to card contacts C4, C7 and C8
  • DC-DC converter for VCC generation separately powered from a 5 V ± 20% supply (VDDP and PGND)
  • 3 or 5 V ± 5 % regulated card supply voltage (VCC) with appropriate decoupling has the following capabilities:Icc < 80 mA at VDDP = 4 to 6.5 VHandles current spikes of 40 nA up to 20 MHzControls rise and fall timesFiltered overload detection at approximately 120 mA
  • Thermal and short-circuit protection on all card contacts
  • Automatic activation and deactivation sequences; initiated by software or by hardware in the event of a short-circuit, card take-off, overheating, VDD or VDDP drop-out
  • Enhanced ESD protection on card side (> 6 kV)
  • 26 MHz integrated crystal oscillator
  • Clock generation for cards up to 20 MHz (divided by 1, 2, 4 or 8 through CLKDIV1 and CLKDIV2 signals) with synchronous frequency changes
  • Non-inverted control of RST via pin RSTIN
  • ISO 7816, GSM11.11 and EMV (payment systems) compatibility
  • Supply supervisor for spike-killing during power-on and power-off and power-on reset (threshold fixed internally or externally by a resistor bridge)
  • Built-in debounce on card presence contacts
  • One multiplexed status signal off

Circuit Diagram

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS4207: Smartcard interface
8.1 1,027 KB

Application Notes

Description Version Size
AN2269: Using the ST8024 smartcard interface
1.3 813 KB
AN3275: Improving the performance of smartcard interfaces using the ST8024L
1.1 1,847 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
ST8024CDRActiveSO-28Tape And Reel-2585_Free Samples.91Distributor reported inventory date: 2016-02-06
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA1502000
Ecopack2 (**)PDF
ST8024CTRActiveTSSOP28 9.7 x 4.4Tape And Reel-2585_-.85Distributor reported inventory date: 2016-02-06
Distributor NameRegionStockMin. order

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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