ST8034CQR

Specialized Overview

The ST8034CQR is a specialized smartcard interface device manufactured by STMicroelectronics, designed for asynchronous and synchronous smartcard applications. It operates at a supply voltage of 5 V with an operating supply current of 70 mA. The component supports a minimum operating temperature of -25 C and a maximum operating temperature of +85 C. It is housed in a QFN-16 package and utilizes SMD/SMT mounting styles. Available in cut tape, MouseReel, and reel packaging formats, this interface provides complete control functions between the smartcard and microcontroller.

Specialized Feature Summary

• Provides complete low-cost analog interface for asynchronous and synchronous smartcards
• Compatible with ISO 7816 and EMV 4.3 payment systems
• Includes integrated crystal oscillator or external clock source for card clock generation up to 20 MHz
• Features automatic activation/deactivation sequences and emergency deactivation upon short-circuit or overheating

Specialized Applications

• ISO 7816 compliant smartcard readers
• EMV 4.3 payment system terminals
• Microcontroller-based smartcard interfaces requiring protection and control functions

Specialized Procurement Notes

Verify the specific suffix 'QR' against official STMicroelectronics documentation to confirm packaging details such as cut tape, MouseReel, or reel specifications. Ensure the QFN-16 package variant matches the design requirements. Confirm that the 5 V supply voltage and -25 C to +85 C temperature range align with the target application environment before procurement.

Specialized Selection Notes

Select the ST8034CQR when a dedicated smartcard interface is required for 5 V systems. Consider the QFN-16 package for space-constrained designs compared to the SO16 option. Verify compatibility with the host microcontroller's signal levels and ensure the optional chip select function meets the need for parallel interface isolation if multiple cards are involved.

Specialized Part Context

The ST8034CQR belongs to the ST8034 family, which includes variants like ST8034T, ST8034AT, and ST8034P. These devices serve as complete analog interfaces placed between the smartcard and microcontroller. The family offers selectable supply voltages (5 V, 3 V, or 1.8 V for ST8034P) and integrates protection, detection, and control functions with minimal external components.

Specialized Replacement Considerations

Direct substitutes within the same family include ST8034T, ST8034AT, and ST8034P. Note that ST8034P supports 1.8 V operation, while others support 5 V or 3 V. Verify pinout and functional equivalence, particularly regarding the VCC_SEL input and package type, before substitution.