TDA8024T/C1,118

Specialized Overview

The TDA8024T/C1,118 is a smart card interface IC designed for asynchronous 3 V or 5 V contact cards. It operates within an ambient temperature range of -25 °C to +85 °C and is housed in a SOIC-28 (SOT136-1) package. The device features a DC-to-DC converter powered by a separate 5 V ± 20% supply (VDDP), generating regulated card voltages with ripple under 350 mV. Supply current reaches 1.5 mA during active clock operation, while the DC/DC converter draws up to 10 mA. Total power dissipation is limited to 0.56 W continuously.

Specialized Feature Summary

• Integrated DC-to-DC converter generates regulated 3 V or 5 V card supply voltage from a separate input.
• Three protected half-duplex bidirectional buffered I/O lines connect to card contacts C4, C7, and C8.
• Built-in 26 MHz crystal oscillator supports synchronous clock generation up to 20 MHz.
• Enhanced ESD protection on card-side contacts exceeds 6 kV.

Specialized Applications

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

Specialized Procurement Notes

Verify component authenticity through authorized NXP channels. Confirm datasheet revision matches design requirements. Ensure handling procedures comply with ESD standards due to sensitivity. Validate that the specific ordering suffix aligns with intended packaging and pin configuration needs before finalizing orders.

Specialized Selection Notes

Select this model when a complete analog interface for 3 V or 5 V smart cards is required. It serves as a direct replacement for the TDA8004AT. Consider the TDA8024AT variant if external Power-on reset threshold adjustment via resistor bridge is not needed. Ensure system microcontroller supports the required activation sequences and timing constraints.

Specialized Part Context

This component belongs to the TDA80xx series of contact smart card reader ICs. It provides a cost-efficient solution for integrating smart card functionality into host systems. The series includes variants like the TDA8035, which offers lower power consumption and additional voltage options.

Specialized Replacement Considerations

The TDA8024AT is documented as a direct replacement for the TDA8004AT. Verify functional equivalence regarding the absence of the PORADJ pin feature in the AT variant before substituting.