TDA8024T/C1,518

Specialized Overview

The TDA8024T/C1,518 is a standard smart card interface IC manufactured by NXP Semiconductors. It provides a complete analog interface for asynchronous 3 V or 5 V smart cards, performing supply, protection, and control functions between the card and microcontroller. The device features a DC-to-DC converter for VCC generation powered separately from a 5 V ± 20% supply (VDDP). It supports three protected half-duplex bidirectional buffered I/O lines to card contacts C4, C7, and C8. The IC includes a 26 MHz integrated crystal oscillator and generates clock frequencies up to 20 MHz via CLKDIV1 and CLKDIV2 signals. It offers enhanced ESD protection on the card side exceeding 6 kV and complies with ISO 7816, GSM11.11, and EMV standards.

Specialized Feature Summary

• Integrated DC-to-DC converter for generating regulated 3 V or 5 V card supply voltage
• Three specifically protected half-duplex bidirectional buffered I/O lines for card contacts
• Built-in 26 MHz crystal oscillator with synchronous frequency division capabilities
• Enhanced electrostatic discharge protection on card-side contacts

Specialized Applications

• IC card readers for banking
• Electronic payment systems
• Identification devices
• Pay TV terminals

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and material specifications. Confirm component availability status as this part may be subject to discontinuation notices. Ensure compatibility with existing system power supplies and microcontroller interfaces before procurement.

Specialized Selection Notes

Select the TDA8024T variant for SO28 plastic small outline packages. Consider the TDA8024AT if external power-on reset threshold adjustment via pin PORADJ is not required. Verify that the host microcontroller can operate down to the necessary deactivation voltage thresholds. Ensure adequate decoupling capacitors are placed near the IC pins to maintain signal integrity.

Specialized Part Context

The TDA8024 serves as a cost-efficient analog interface solution for smart card applications. It acts as a direct replacement for the TDA8004AT in many designs. The component integrates essential functions such as voltage regulation, fault detection, and clock generation into a single chip, reducing the need for external components in reader designs.

Specialized Replacement Considerations

The TDA8024AT is documented as a direct replacement for the TDA8004AT. For legacy designs originally using the TDA8004AT, the TDA8024AT should be evaluated for pinout and functional compatibility.