ST8034HNQR

Specialized Overview

The ST8034HNQR is a 24-pin smartcard interface device from STMicroelectronics, housed in an HVQFN24 package. It operates within a supply voltage range of 4.0 V to 6.5 V and supports an industrial temperature grade spanning -25°C to 85°C. The component provides complete analog interfaces for asynchronous and synchronous smartcards, compatible with ISO 7816, NDS, and EMV 4.3 payment systems. It features three protected half-duplex bidirectional buffered I/O lines and supports card clock frequencies up to 20 MHz via integrated crystal oscillator or external sources. The device ensures controlled voltage rise/fall times, smart overload detection, and glitch immunity.

Specialized Feature Summary

• Provides complete low-cost analog interface between smartcard and microcontroller with minimal external components
• Supports ISO 7816, NDS, and EMV 4.3 payment system standards with pin-selectable supply voltages
• Includes automatic activation/deactivation sequences and emergency deactivation triggered by short-circuits or overheating

Specialized Applications

• Point-of-sale (POS) terminals
• Set-top boxes and pay TV systems
• Identification and banking applications
• Tachograph devices

Specialized Procurement Notes

Verify the specific ordering suffix 'QR' against the manufacturer's official documentation to confirm packaging details, as datasheets may list generic variants like 'HN'. Ensure the procurement channel provides valid traceability for the Ecopack3 RoHS compliant status. Cross-reference the active status and industrial grade specifications with current STMicroelectronics catalogs before finalizing orders.

Specialized Selection Notes

Select the ST8034HNQR when designing systems requiring a 24-pin interface solution for smartcards operating at 5 V, 3 V, or 1.8 V. This model is appropriate for applications needing integrated clock generation up to 20 MHz and robust protection features such as glitch immunity and overload detection. Consider the HVQFN24 package constraints for PCB layout and thermal management in industrial environments.

Specialized Part Context

The ST8034HNQR belongs to the ST8034xx family of smartcard interface devices designed to sit between the smartcard and the microcontroller. These devices provide necessary power, protection, detection, and control functions. The HN variant specifically supports programmable clock division for higher frequency operations compared to other family members, making it suitable for high-speed communication requirements.

Specialized Replacement Considerations

The ST8034HC is a related variant within the same family that offers similar functionality but may differ in clock configuration capabilities. Verify pin compatibility and functional equivalence with the ST8034HC if substituting, noting that the HN version supports specific CLKDIV pins for frequency programming.