SEC1110I-A5-02

Specialized Overview

The SEC1110I-A5-02 is a single-chip Smart Card bridge to USB and UART interfaces manufactured by Microchip Technology. It integrates an enhanced 8051 microcontroller with 16 KB OTP ROM and 1.5 KB RAM. The device supports one Smart Card interface compliant with ISO/IEC 7816, EMV 4.2/4.3, ETSI TS 102 221, and PC/SC standards. It operates at 12 Mbps via USB 2.0 Full Speed and supports Class A, B, C, and AB cards (1.8V, 3.0V, 5.0V). Supply voltage ranges from 3.6V to 5.5V, with user-accessible I/O pins rated for 5.0V tolerance. Operating temperature spans -40°C to +85°C in a QFN-16 package.

Specialized Feature Summary

• Integrates TrustSpan technology for secure communication and data processing across system boards and networks.
• Provides full-packet FIFO of 261 bytes for transmit and receive, enabling half-duplex operation without software intervention between phases.
• Includes programmable Smart Card clock frequency and internal procedure byte filtering for T=0 protocol parity error recovery.
• Features integrated USB 1.5 K pull-up resistor and Dp, Dm series termination resistors within the USB devices controller.

Specialized Applications

• USB Smart Card readers
• UART-based Smart Card readers
• Dual Smart Card readers

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's Product Identification System to confirm interface type and temperature range. Ensure the component matches the required Smart Card interface count and host connection method before integration into the design.

Specialized Selection Notes

Select this model when a single Smart Card interface connected exclusively via USB is required. The SEC1110 variant differs from the SEC1210 by lacking the second Smart Card interface and UART/SPI host capabilities. Confirm that the application does not require dual card support or alternative host connectivity options.

Specialized Part Context

This component belongs to the SEC1110/SEC1210 family of Smart Card bridges. It serves as a superset of the 16450 UART architecture, extending functionality with specialized state machines for T=0 protocol parsing and hardware-managed activation sequences. The device replaces discrete logic solutions by integrating the USB PHY, device controller, and Smart Card regulators on a single chip.

Specialized Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.