ST8034PQR

Specialized Overview

The ST8034PQR is a smart card interface IC from STMicroelectronics, designed for asynchronous and synchronous smart cards. It operates with a supply voltage range of 2.7 V to 5.5 V, typically supporting 3.3 V or 5 V systems. The device provides complete interface functions including supply control, protection, detection, and signal buffering between the microcontroller and the smart card. It features a maximum power dissipation of 250 mW and operates within a temperature range of -25 °C to 85 °C. Packaged in a 16-pin QFN EP (3 mm x 3 mm) with tape and reel delivery, it supports EMV 4.3 and ISO 7816 standards.

Specialized Feature Summary

• Provides complete analog interface functions for smart cards, including supply regulation, protection, and bidirectional I/O buffering.
• Supports selectable smart card supply voltages (5 V, 3 V, or 1.8 V) with controlled rise/fall times and overload detection.
• Integrates automatic activation/deactivation sequences and emergency deactivation triggered by short-circuits or overheating.
• Features enhanced ESD protection on card contacts and multipurpose status signals for system monitoring.

Specialized Applications

• Payment terminals compliant with EMV 4.3 and ISO 7816 standards
• Smart card readers in personal electronics and computers
• Industrial communication equipment requiring secure card interfaces

Specialized Procurement Notes

Verify the specific suffix 'PQR' corresponds to the 16-pin QFN EP package and tape-and-reel orientation. Confirm that the 1.8 V capability aligns with your system requirements, as this variant explicitly supports lower voltage operation compared to standard 5 V/3 V models. Ensure thermal management accounts for the 250 mW dissipation limit in the compact QFN footprint.

Specialized Selection Notes

Select the ST8034PQR when a space-saving QFN package is required alongside support for 1.8 V smart card supplies. Compare against the SO16 variants if board space permits but higher pin count flexibility is needed. Verify compatibility with host microcontroller logic levels and ensure the integrated clock generation meets the target frequency requirements up to 20 MHz.

Specialized Part Context

The ST8034PQR belongs to the ST8034 family of low-cost smart card interface ICs. This series includes variants like ST8034T, ST8034AT, and ST8034C, which share core functionality but differ in package types and specific feature sets such as chip select isolation. The PQR designation specifically identifies the QFN packaging and reel configuration within this product line.

Specialized Replacement Considerations

ST8034P is a direct functional equivalent in a different package. ST8034ATDT offers similar features in an SOIC-16 package. Verify pinout compatibility and voltage specifications before substituting.