ST8024LCTR

Specialized Overview

The ST8024LCTR is a smart card interface IC from STMicroelectronics, designed to minimize microprocessor hardware and software complexity in applications requiring smart cards. It operates with single supply voltages of 1.8 V, 3 V, or 5 V and features a 26 MHz integrated crystal oscillator. The device supports asynchronous Class A, B, and C smart cards, providing three protected half-duplex bi-directional buffered I/O lines for contacts C4, C7, and C8. It includes a step-up converter for VCC generation, regulated card supply voltage capabilities up to 80 mA, and handles current spikes up to 20 MHz. The IC offers enhanced ESD protection (>6 kV), thermal and short-circuit protection, and automatic activation/deactivation sequences. It is compatible with ISO 7816, GSM11.11, and EMV 4.2 standards.

Specialized Feature Summary

• Integrated 26 MHz crystal oscillator and clock generation for cards up to 20 MHz
• Enhanced ESD protection on the card side exceeding 6 kV
• Automatic activation and deactivation sequences triggered by software or hardware events
• Built-in debounce on card presence contacts and supply supervisor for power-on/reset

Specialized Applications

• Set-top boxes
• Electronic payment systems
• Pay TV interfaces
• Identification cards

Specialized Procurement Notes

Verify the specific suffix 'CTR' indicates tape and reel packaging when sourcing. Confirm compatibility requirements if replacing older ST8024 variants, noting potential differences in threshold values. Ensure the design accounts for the 28-pin TSSOP package dimensions and thermal characteristics during PCB layout.

Specialized Selection Notes

Select this component for designs requiring a complete low-cost analog interface for asynchronous smart cards. It is suitable for applications needing support for 1.8 V, 3 V, and 5 V supplies without external complex circuitry. Consider its compatibility with NDS conditional access systems, excluding the ST8024LTR variant, for secure access implementations.

Specialized Part Context

The ST8024LCTR belongs to the ST8024L family of smart card interface ICs. It is functionally compatible with the standard ST8024, except for variations in the external rise/fall threshold values (Vth(ext)rise/fall). This family is engineered to reduce system complexity by integrating protection, control, and power management functions typically handled by discrete components.

Specialized Replacement Considerations

The ST8024LCDR is a compatible alternative within the same family. Note that the ST8024LTR is excluded from NDS conditional access system compatibility. Verify threshold value specifications when substituting between these variants to ensure signal integrity.