TDA8034AT/C1,112

Specialized Overview

The TDA8034AT/C1,112 is a smart card interface IC in an SO16 package. It provides supply, protection, and control functions for asynchronous and synchronous smart cards operating at 5 V or 3 V. The device features a single protected half-duplex bidirectional buffered I/O line (C7) and a regulated VCC supply capable of delivering up to 65 mA with filtered overload detection at approximately 120 mA. It includes thermal and short-circuit protection, enhanced ESD protection exceeding 6 kV on the card side, and automatic activation/deactivation sequences triggered by faults or card removal. Clock generation supports frequencies up to 20 MHz using an external crystal or input clock.

Specialized Feature Summary

• Integrated circuit smart card interface in an SO16 package
• Compatible with ISO 7816, NDS and EMV 4.2 payment systems
• Built-in debouncing on card presence contacts
• Multiplexed status signal using pin OFFN

Specialized Applications

• Pay TV
• Electronic payment
• Identification
• Bank card readers

Specialized Procurement Notes

Verify the exact ordering suffix against the manufacturer's current documentation to ensure correct packaging and environmental compliance specifications. Confirm that the component meets RoHS and REACH requirements for your specific region. Cross-reference the datasheet revision date to ensure all electrical characteristics align with your design constraints before finalizing procurement orders.

Specialized Selection Notes

Select this model when a cost-effective analog interface for 5 V or 3 V smart cards is required. Ensure the design accommodates the SO16 package dimensions and thermal resistance limits. Verify that the microcontroller interface voltage matches the VDD(INTF) supply range. Consider the single I/O line limitation compared to multi-contact interfaces if additional card pins are needed.

Specialized Part Context

The TDA8034AT is part of NXP's TDA series of smart card interface integrated circuits. This family is designed to bridge the gap between microcontrollers and ISO 7816 compliant smart cards. The AT variant specifically offers different clock division options compared to the standard T version, allowing flexibility in clock frequency generation for various card types and communication speeds.

Specialized Replacement Considerations

TDA8034T/C1,112