TDA8004T/C1,118

Specialized Overview

The TDA8004T is a low-cost analog interface IC for asynchronous smart cards, designed to operate between the card and a microcontroller. It provides supply protection and control functions using minimal external components. The device supports VDD supply voltages from 2.7 V to 6.5 V and utilizes a separate step-up converter (VDDP: 4.5 V to 6.5 V) to generate a regulated 5 V ± 5% card supply (VCC). It features three protected half-duplex bidirectional buffered I/O lines (C4, C7, C8), an integrated 26 MHz crystal oscillator, and clock generation up to 20 MHz. The IC ensures ISO 7816, GSM11.11, and EMV compatibility with thermal, short-circuit, and ESD protections.

Specialized Feature Summary

• Integrated step-up converter generates a regulated 5 V card supply from a separate 5 V source.
• Three protected half-duplex bidirectional buffered I/O lines for data exchange.
• Built-in 26 MHz oscillator with synchronous clock division capabilities up to 20 MHz.
• Comprehensive fault detection including thermal shutdown, short-circuit protection, and voltage supervision.

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 or certified distributors. Confirm the SO28 package variant matches design requirements. Check for end-of-life status as indicated by legacy documentation. Ensure ordering suffixes align with specific manufacturing batches if required for traceability. Validate datasheet revisions against current production standards.

Specialized Selection Notes

Select this component for applications requiring a complete analog interface for asynchronous smart cards. Ensure the system controller operates within the 2.7 V to 6.5 V VDD range. Verify that the application can provide a separate 4.5 V to 6.5 V supply for the step-up converter. Consider layout constraints for low-ESR capacitors near the VCC and step-up pins to maintain stability.

Specialized Part Context

The TDA8004T belongs to the TDA8004 family of smart card interface ICs manufactured by NXP Semiconductors (formerly Philips Semiconductors). It is part of a series designed for cost-effective integration in payment and identification systems. The device complements other interface solutions by providing dedicated hardware for power regulation and signal buffering in smart card readers.

Specialized Replacement Considerations

Check for TDA8034T or TDA8034AT as potential alternatives in the same product family. Verify pinout compatibility and electrical specifications before substitution. Ensure the replacement supports the required asynchronous smart card protocols and voltage levels.