TDA8024TT/C1/S1J

Specialized Overview

The TDA8024TT/C1/S1J is a smart card interface IC in a TSSOP-28 package. It supports 3 V or 5 V asynchronous cards with a VDD supply range of 2.7 V to 6.5 V and a VDDP range of 4.0 V to 6.5 V. The device generates regulated card supply voltages (VCC) up to 80 mA at 5 V or 65 mA at 3 V, with ripple under 350 mV. It features an integrated 26 MHz oscillator for clock generation up to 20 MHz, three protected bidirectional I/O lines, and enhanced ESD protection exceeding 6 kV on card contacts.

Specialized Feature Summary

• Integrated DC-to-DC converter for generating regulated 3 V or 5 V card supply voltage
• Built-in 26 MHz crystal oscillator supporting synchronous frequency division up to 20 MHz
• Three specifically protected half-duplex buffered I/O lines with active pull-up capability
• Automatic activation and deactivation sequences triggered by software or hardware faults

Specialized Applications

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

Specialized Procurement Notes

Verify the specific suffix /S1J against official documentation to confirm copper wire construction versus gold wire variants. Confirm RoHS compliance status through current manufacturer declarations as product lifecycles may change. Ensure the ordering code matches the exact package dimensions and lead finish required for your PCB assembly process.

Specialized Selection Notes

Select this component when designing standard contact-based smart card interfaces requiring ISO 7816 compatibility. It serves as a direct replacement for the TDA8004AT in existing designs. Consider the TDA8024AT if external power-on reset threshold adjustment via the PORADJ pin is not required for the application.

Specialized Part Context

This part belongs to the NXP TDA8024 series of analog smart card interface ICs. It is designed to sit between the microcontroller and the smart card, handling all supply, protection, and control functions. The series includes variants like the TDA8024T and TDA8024AT, differing primarily in package type and internal supervisor configuration.

Specialized Replacement Considerations

The TDA8024AT is a direct functional replacement for the TDA8004AT. For pin-compatible upgrades within the same family, verify that the TDA8024T variant meets the thermal and packaging requirements if the TSSOP-28 form factor is acceptable.