ST8004CDR

Specialized Overview

The ST8004CDR is a smart card interface IC manufactured by STMicroelectronics, designed for asynchronous 3V and 5V smart cards. It operates within a supply voltage range of 2.7V to 6.5V (VDD) and requires a separate step-up converter supply of 4.5V to 6.5V (VDDP). The device features an integrated 26MHz crystal oscillator and supports clock frequencies up to 20MHz via programmable dividers. It provides three protected half-duplex bidirectional buffered I/O lines and includes automatic activation/deactivation sequences. The component is housed in a 28-pin SO-28 package with a tape and reel configuration.

Specialized Feature Summary

• Integrated step-up converter for generating regulated card supply voltages
• Automatic activation and deactivation sequences initiated by software or hardware faults
• Enhanced ESD protection on card side contacts
• Thermal and short-circuit protections on all card contacts

Specialized Applications

• Smartcard readers for Set Top Box applications
• IC card readers for banking systems
• Identification card reading devices

Specialized Procurement Notes

Verify the specific ordering code suffix against official documentation to confirm packaging details. The CDR suffix indicates a Tape & Reel format containing 1000 parts per reel. Ensure compatibility with the required operating temperature range of 0 to 85 °C. Confirm that the SO-28 package dimensions align with the target PCB layout constraints before finalizing procurement orders.

Specialized Selection Notes

Select this component when designing interfaces for asynchronous Class A, B, and C smart cards requiring low-cost analog interfacing. It serves as a direct replacement for the ST8004 model. Consider the requirement for a separate VDDP supply for the internal voltage doubler. Ensure the microcontroller logic levels match the VDD reference provided by this interface.

Specialized Part Context

The ST8004CDR belongs to the ST8004 series of smart card interface ICs from STMicroelectronics. This series is engineered to minimize microprocessor hardware and software complexity in smart card applications. The device integrates essential control functions, allowing placement directly between the smart card and the host microcontroller with minimal external components.

Specialized Replacement Considerations

The ST8004CDR is documented as a direct replacement for the standard ST8004 model.