Microchip Technology SEC1100-A5-02NC-TR

Overview

SEC1100-A5-02NC-TR from SMSC is a single-chip smart card bridge IC integrating an enhanced 8051 microcontroller, full-speed USB 2.0 device controller, and one ISO/IEC 7816-compliant smart card interface. It supports T=0/T=1 protocols, 1.8–5.0 V card classes, and operates from 3.0–5.5 V supply. Used in USB-based smart card readers requiring EMV-compliant secure transaction handling.

For engineers reviewing the SEC1100-A5-02NC-TR datasheet, SEC1100-A5-02NC-TR pinout, SEC1100-A5-02NC-TR application, or SEC1100-A5-02NC-TR equivalent, key selection criteria include its OTP-ROM-based firmware execution, 259-byte full-packet FIFO per smart card channel, integrated 48 MHz oscillator (no external crystal), 5.0 V-tolerant I/O, and Class A/B/C/AB card voltage support with automatic deactivation on removal.

Technical Context

The SEC1100-A5-02NC-TR implements a dedicated smart card bridge architecture where the enhanced 8051 core (9× faster than standard 80C51) manages all peripherals via SFR/XDATA register space. Its ISO/IEC 7816 interface includes hardware-assisted protocol timers (Guard, CWT, Timeout), internal procedure byte filtering for T=0, and automatic parity error recovery via character repetition.

USB functionality is handled by an integrated full-speed (12 Mbps) device controller with five programmable bulk/interrupt endpoints (8/16/32/64 byte buffers) and built-in 1.5 kΩ pull-up resistor. Power management includes self-contained smart card regulators (1.8 V/3.0 V/5.0 V), over-current sensing with interrupt, and hardware-guaranteed compliant deactivation sequences.

Key Specifications

Pinout & Package

SEC1100-A5-02NC-TR is housed in a 16-pin QFN package (5 mm × 5 mm body, 0.8 mm height, 0.8 mm pitch) with exposed thermal pad. Pin functions are defined per SEC1100 block diagram and package outline (Figure 4, Data Brief Rev. 1.0).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar smart card bridge applications.

Compared with SEC1200-CN-02NC-TR and FT4232HL, SEC1100-A5-02NC-TR delivers lowest BOM count and fastest time-to-market for single-channel USB smart card readers by integrating EMV-compliant timing hardware, smart card power regulation, and USB device controller in one die-eliminating external components and firmware timing tuning.

Availability

SEC1100-A5-02NC-TR is available at Aetrix Electronics and suitable for USB smart card readers, embedded secure access terminals, and EMV-compliant payment peripherals requiring stable component supply and long-term lifecycle support.

Supply support for SEC1100-A5-02NC-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

SMSC (Standard Microsystems Corporation) was a fabless semiconductor company specializing in connectivity, embedded control, and security ICs before its acquisition by Microchip Technology in 2012.

The SEC1100 product line was designed specifically for secure, standards-compliant smart card bridging in USB-connected peripherals-targeting banking, government ID, and enterprise authentication systems where EMV timing accuracy and hardware-enforced deactivation are mandatory.

FAQ

What is the primary function of the SEC1100-A5-02NC-TR?

The SEC1100-A5-02NC-TR is a dedicated smart card bridge IC that translates USB 2.0 full-speed commands into ISO/IEC 7816-compliant smart card transactions. It integrates an enhanced 8051 microcontroller, USB device controller, and one smart card interface with hardware EMV timing enforcement. SEC1100-A5-02NC-TR handles T=0/T=1 protocols, automatic card activation/deactivation, and on-chip voltage regulation-enabling standalone USB smart card readers without external controllers.

Does the SEC1100-A5-02NC-TR support both T=0 and T=1 smart card protocols?

Yes, the SEC1100-A5-02NC-TR fully supports both T=0 and T=1 protocols per ISO/IEC 7816-3. It includes hardware-implemented protocol timers (guard time, CWT, timeout), internal procedure byte filtering for T=0, and automatic character repetition for T=0 parity error recovery. These features ensure EMV 4.2 compliance without firmware timing intervention-SEC1100-A5-02NC-TR maintains strict timing constraints even under variable host load.

What smart card voltage classes does the SEC1100-A5-02NC-TR support?

The SEC1100-A5-02NC-TR supports Class A (1.8 V), Class B (3.0 V), Class C (5.0 V), and Class AB smart cards. Its integrated regulators generate 1.8 V, 3.0 V, and 5.0 V outputs from a single 3.0–5.5 V supply, with automatic voltage selection based on card ATR. An internal 4.8 V comparator disables Class A support if input voltage falls below threshold-SEC1100-A5-02NC-TR ensures safe, standards-compliant power delivery across all card types.

Is an external crystal required for SEC1100-A5-02NC-TR operation?

No, the SEC1100-A5-02NC-TR includes a self-clocking 48 MHz internal oscillator and requires no external crystal or clock source. This simplifies board layout, reduces BOM cost, and improves reliability by eliminating crystal-related startup delays or frequency drift. The 8051 core derives its 16 MHz maximum clock from this oscillator-SEC1100-A5-02NC-TR achieves full USB and smart card timing accuracy without external timing components.

How does the SEC1100-A5-02NC-TR handle smart card removal events?

The SEC1100-A5-02NC-TR performs hardware-guaranteed, EMV-compliant deactivation on smart card removal. It detects loss of card contact, triggers over-current sensing, and executes the full deactivation sequence-including voltage ramp-down and reset assertion-without CPU involvement. This ensures safe, standards-compliant behavior and prevents bus contention or data corruption. SEC1100-A5-02NC-TR also generates an interrupt to notify firmware of the event for higher-level state management.