TDA8004AT/C1,118

Specialized Overview

The TDA8004AT/C1,118 is a complete analog interface for asynchronous 3 V or 5 V smart cards. It performs supply, protection, and control functions between the card and microcontroller. The IC features a step-up converter for VCC generation powered by a separate 5 V ± 10 % supply (VDDP). It provides three protected half-duplex bidirectional buffered I/O lines (C4, C7, C8) and regulates VCC to 5 V or 3 V ± 5 %. An integrated 26 MHz crystal oscillator supports clock generation up to 20 MHz. The device operates within an ambient temperature range of -25 °C to +85 °C and is housed in an SO28 plastic small outline package.

Specialized Feature Summary

• Integrated step-up converter for generating regulated card supply voltage from a separate power rail
• Three specifically protected half-duplex bidirectional buffered I/O lines for card contact communication
• Built-in 26 MHz crystal oscillator with synchronous frequency division capabilities
• Automatic activation and deactivation sequences triggered by software commands or hardware faults

Specialized Applications

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

Specialized Procurement Notes

Verify the component status as discontinued before initiating procurement. Confirm that the ordering suffix /C1,118 corresponds to the specific tape and reel packaging configuration required for your assembly line. Ensure compatibility with existing design files if substituting into legacy hardware.

Specialized Selection Notes

Select this component when designing interfaces for asynchronous 3 V or 5 V smart cards requiring minimal external components. Ensure the system design accommodates the separate VDDP supply requirement for the internal step-up converter. Verify that the microcontroller supply voltage matches the VDD range of 2.7 V to 6.5 V for proper signal referencing.

Specialized Part Context

The TDA8004AT is part of the TDA80xx series of contactless and contact smart card interface ICs. This series is designed for low-cost integration into various reading devices. The TDA8004AT serves as a foundational analog interface solution, handling the complex timing and power regulation required for ISO 7816 compliant smart card operations.

Specialized Replacement Considerations

The TDA8024AT is documented as a direct replacement for the TDA8004AT. Verify pinout compatibility and electrical parameter alignment before substitution. Review the TDA8024 datasheet for any differences in feature sets or application notes.