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Smart card interface
  • active Active

The ST8024L is a complete low-cost analog interface for asynchronous Class A, B, and C smartcards. It can be placed between the card and the microcontroller with few external components to perform all supply protection and control functions. The ST8024LCDR and ST8024LCTR are compatible with the ST8024 (with the exception of Vth(ext)rise/fallvalue).

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Errata Sheet
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Key Features

  • Designed to be compatible with the NDS conditional access system (except ST8024LTR)
  • ISO 7816, GSM11.11 and EMV 4.2 (payment systems) compatible
  • IC card interface
  • 3 V or 5 V supply for the ST8024L device (VDD)
  • Three specifically protected half-duplex bi-directional buffered I/O lines to card contacts C4, C7 and C8
  • Step-up converter for VCCgeneration separately powered by a 5 V ± 20% supply (VDDPand PGND)
  • 1.8 V ± 6.5%, 3 V or 5 V ± 5% regulated card supply voltage (VCC) with appropriate decoupling has the following capabilities:
  • ICC< 80 mA at VDDP= 4.75 to 6.5 V
  • Handles current spikes of 40 nA up to 20 MHz
  • Controls rise and fall times
  • Filtered overload detection at ~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, VDDor VDDPdropout
  • Enhanced ESD protection on card side (>6 kV)
  • 26 MHz integrated crystal oscillator
  • Built-in debounce on card presence contacts
  • One multiplexed status signal OFF
  • Non-inverted control of RST via pin RSTIN
  • Clock generation for cards up to 20 MHz (divided by 1, 2, 4 or 8 through CLKDIV1 and CLKDIV2 signals) with synchronous frequency changes
  • Supply supervisor for spike-killing during power-on and power-off and power-on reset (threshold fixed internally or externally by a resistor divider)

Circuit Diagram

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS6888: Smartcard interface
5.0 705 KB

Application Notes

Description Version Size
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**
ST8024LACDRActiveSO-28Tape And Reel-2585_-.78Distributor reported inventory date: 2016-02-29
Distributor NameRegionStockMin. order
Ecopack1 (*)-
ST8024LCDRActiveSO-28Tape And Reel-2585_-.78No availability reported, please contact our Sales officeEcopack1 (*)PDF
ST8024LCTRActiveTSSOP28 9.7 x 4.4Tape And Reel-2585_-.78Distributor reported inventory date: 2016-02-29
Distributor NameRegionStockMin. order
ST8024LTRActiveTSSOP 20Tape And Reel-2585_-.65Distributor reported inventory date: 2016-02-29
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA25002500

(*) 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.