TDA8024AT/C1,112

Specialized Overview

The TDA8024AT/C1,112 is a standard smart card interface IC designed for asynchronous 3 V or 5 V cards. It performs supply, protection, and control functions between the card and microcontroller. The device features a DC-to-DC converter for VCC generation from a separate 5 V ±20% supply (VDDP). It provides 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. It supports ISO 7816, GSM11.11, and EMV compatibility. The package is SO28 plastic small outline with 28 leads.

Specialized Feature Summary

• Integrated DC-to-DC converter for regulated card supply voltage generation
• Three specifically protected half-duplex bidirectional buffered I/O lines
• Built-in thermal and short-circuit protection on all card contacts
• Enhanced ESD protection on card side exceeding 6 kV

Specialized Applications

• IC card readers for banking
• Electronic payment systems
• Identification applications
• Pay TV interfaces

Specialized Procurement Notes

Verify the specific ordering suffix matches the required package variant. Confirm that the AT designation aligns with the absence of external Power-on reset threshold adjustment capabilities compared to the standard version. Ensure component authenticity through authorized NXP channels.

Specialized Selection Notes

Select this component when a direct replacement for the TDA8004AT is required. Consider the fixed internal Power-on reset threshold if external resistor bridges are not utilized in the design. Evaluate power dissipation limits relative to ambient temperature constraints during continuous operation.

Specialized Part Context

This part belongs to the TDA8024 series of contact smart card reader ICs. It serves as a cost-efficient analog interface solution. The AT variant is functionally similar but lacks the external POR adjustment pin found in other versions. It is widely used in secure access and payment terminals.

Specialized Replacement Considerations

TDA8004AT is a direct predecessor replacement target. TDA8035 is a successor offering lower power consumption and additional security features while maintaining software compatibility.