Microchip Technology SEC1110I-A5-02-TR

Overview

SEC1110I-A5-02-TR from Microchip Technology is a single-chip Smart Card bridge IC supporting USB 2.0 Full-Speed (12 Mbps) interface and one ISO/IEC 7816-compliant Smart Card port. It integrates an enhanced 8051 core (9.6 MHz max), 16 KB OTP ROM, 1.5 KB RAM, and on-die Smart Card power regulation for 1.8V/3.0V/5.0V cards. Used in compact USB Smart Card readers requiring EMV 4.3 and PC/SC compliance.

For engineers reviewing the SEC1110I-A5-02-TR datasheet, SEC1110I-A5-02-TR pinout, SEC1110I-A5-02-TR application, or SEC1110I-A5-02-TR equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options - all grounded in Microchip's DS00001561E documentation and official package data.

Technical Context

The SEC1110I-A5-02-TR implements a dedicated Smart Card subsystem with full T=0/T=1 protocol support, 261-byte full-packet FIFO per direction, hardware-managed cold/warm resets, and EMV-compliant guard/time-out/CWT timers. Its self-clocking internal oscillator eliminates external crystal requirements.

USB functionality is handled by an integrated FS PHY with 1.5 kΩ D+ pull-up resistor and series termination on DP/DM, plus a USB device controller supporting five programmable bulk/interrupt endpoints (8–64 byte buffers) and control endpoint 0 with 8/16/32/64 byte buffer options.

Key Specifications

Pinout & Package

SEC1110I-A5-02-TR is housed in a 16-pin QFN package (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal slug (VSS). All pins are electrically validated per DS00001561E Table 3-1 and Figure 4-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Smart Card bridge applications.

Compared with SEC1210I-CN-02-TR, SEC1110I-A5-02-TR reduces PCB area and component count for single-card applications; compared with AC102-2000-001, it delivers deterministic EMV timing enforcement and integrated Smart Card power without external regulators or USB PHY components.

Availability

SEC1110I-A5-02-TR is available at Aetrix Electronics and suitable for USB Smart Card readers, EMV payment terminals, and secure identity verification systems requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for SEC1110I-A5-02-TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a global semiconductor company specializing in microcontrollers, analog devices, and security ICs, with emphasis on embedded control and trusted computing solutions.

The SEC1110 product line delivers certified Smart Card bridging functionality targeting payment, identification, and secure access applications where EMV, ISO/IEC 7816, and PC/SC compliance are mandatory.

FAQ

What is the maximum Smart Card data rate supported by the SEC1110I-A5-02-TR?

The SEC1110I-A5-02-TR supports Smart Card ETU rates up to 826 Kbps, covering all current and proposed ISO/IEC 7816 transmission speeds. This capability is implemented in hardware and fully compliant with EMV 4.2/4.3 timing requirements. The SEC1110I-A5-02-TR achieves this using its programmable clock generator and dedicated Smart Card state machines - no firmware intervention is needed to sustain high-speed transfers.

Does the SEC1110I-A5-02-TR require an external crystal or oscillator?

No, the SEC1110I-A5-02-TR uses a self-clocking internal oscillator and does not require an external crystal or clock source. This simplifies board layout and reduces BOM cost. The internal oscillator drives both the 8051 core (up to 9.6 MHz) and the USB 48 MHz PLL, and is factory-trimmed for accuracy. The SEC1110I-A5-02-TR maintains full USB 2.0 Full-Speed compliance without external timing components.

How does the SEC1110I-A5-02-TR handle Smart Card voltage selection for Class A, B, and C cards?

The SEC1110I-A5-02-TR automatically detects Smart Card class and configures SC1_VCC to deliver 1.8V (Class A), 3.0V (Class B), or 5.0V (Class C) using its integrated Smart Card regulator. Voltage selection is enforced by internal logic that monitors card presence and protocol handshake - no external switching or firmware voltage management is required. The SEC1110I-A5-02-TR also disables Class A support if VDD5 falls below 4.8V, as verified by its internal comparator.

Is the SEC1110I-A5-02-TR pin-compatible with the SEC1210I-CN-02-TR?

No, the SEC1110I-A5-02-TR is not pin-compatible with the SEC1210I-CN-02-TR. The SEC1110I-A5-02-TR uses a 16-pin QFN package, while the SEC1210I-CN-02-TR uses a 24-pin QFN with additional pins for SC2 interface, SPI1, and UART signals. Their pin assignments differ significantly - for example, SC1_PRSNT_N occupies Pin 5 on SEC1110I-A5-02-TR but Pin 5 on SEC1210I-CN-02-TR is assigned to SC1_PRSNT_N/JTAG_TMS, whereas SC2_PRSNT_N appears at Pin 8 on the latter. PCB redesign is required for substitution.

What USB device class does the SEC1110I-A5-02-TR implement?

The SEC1110I-A5-02-TR implements the USB Communications Device Class (CDC) Abstract Control Model (ACM), appearing as a virtual COM port to the host OS. It supports standard PC baud rates (9600–115200) and a high-speed 3 Mbaud mode. The SEC1110I-A5-02-TR handles all USB enumeration, descriptor reporting, and CDC-specific request processing in hardware/firmware - no host-side driver development is required beyond standard CDC ACM class drivers included in Windows, Linux, and macOS.