SEC1110-A5-02-TR

Specialized Overview

The SEC1110-A5-02-TR is a single-chip Smart Card bridge to USB and UART interfaces manufactured by Microchip Technology. It integrates an enhanced 8051 microcontroller, a full-speed USB 2.0 controller, and a smart card interface compliant with ISO/IEC 7816, EMV, and PC/SC standards. The device supports Class A, B, C, and AB smart cards with supply voltages of 1.8V, 3.0V, and 5.0V. It features a 9.6 MHz maximum clock speed, 16 KB OTP ROM, and 1.5 KB RAM. Operating voltage ranges from 3.6V to 5.5V, with user-accessible I/O pins rated for 5.0V tolerance. The component is housed in a QFN-16 package.

Specialized Feature Summary

• Integrates an enhanced 8051 microcontroller with reduced instruction cycle time and on-chip debug capabilities via JTAG.
• Provides a full-packet FIFO for transmit and receive operations, supporting half-duplex operation without software intervention between phases.
• Includes integrated USB PHY with D+ pull-up resistor and series termination resistors, compliant with USB 2.0 specifications.
• Features internal power management with regulators for 1.8V, 3.0V, and 5.0V outputs and over-current protection.

Specialized Applications

• USB-based smart card readers
• UART-based smart card readers
• Dual smart card reader systems

Specialized Procurement Notes

Verify the specific ordering suffix -TR indicates tape and reel packaging when sourcing this component. Confirm that the A5 variant matches the required temperature range and pin configuration for your design. Ensure compatibility with existing firmware due to the embedded 8051 architecture. Check for any recent product change notifications regarding manufacturing updates or material composition changes before finalizing procurement.

Specialized Selection Notes

Select the SEC1110-A5-02-TR when a single smart card interface connected via USB is required. This model differs from the SEC1210 series, which offers dual card interfaces and additional UART/SPI options. Consider the QFN-16 package size and thermal requirements during PCB layout. Verify that the host system can support the necessary USB enumeration and that the application logic aligns with the 8051 processor constraints.

Specialized Part Context

This component belongs to the SEC1110/SEC1210 family of smart card bridges. It serves as a specialized interface solution for connecting smart cards to host systems via USB. The SEC1110 variant specifically provides a single smart card interface, distinguishing it from the dual-interface SEC1210 models. It is designed for applications requiring high compliance with international smart card standards.

Specialized Replacement Considerations

Direct substitutes include other parts within the SEC1110 family with different packaging or suffix variations. For dual-card applications, the SEC1210 series may be considered if hardware modifications are acceptable. Verify pinout compatibility and firmware portability when evaluating alternative components from the same manufacturer.

Specialized FAQ

Does the SEC1110 require an external crystal oscillator?

No, the SEC1110 utilizes a self-clocking internal oscillator, eliminating the need for an external crystal.

What smart card protocols are supported?

The device fully supports both T=0 and T=1 protocols, including automatic character repetition for parity error recovery in T=0 mode.

How is the smart card power managed?

Power is regulated internally with outputs for 1.8V, 3.0V, and 5.0V. It includes current limiting and over-current sense interrupts for short-circuit detection.