Analog Devices Inc./Maxim Integrated 73S1209F-68IM/F

Overview

73S1209F-68IM/F from Teridian Semiconductor is a self-contained smart card reader IC with integrated 80515 CPU core, ISO-7816/EMV bridge, 5×6 PINpad interface, and dual power supply support (2.7–3.6V digital, 4.75–5.5V analog). It delivers up to 24 MIPS, 32KB Flash, and hardware-accelerated T=0/T=1 protocol handling for secure payment terminals and government ID readers.

For engineers reviewing the 73S1209F-68IM/F datasheet, 73S1209F-68IM/F pinout, 73S1209F-68IM/F application, or 73S1209F-68IM/F equivalent, key selection criteria include UART-to-ISO7816 bridging capability, embedded EMV4.1 firmware readiness, multi-SAM expandability via I²C, and on-chip VCC regulation for 1.8V/3V/5V smart cards.

Technical Context

The 73S1209F-68IM/F integrates an 80515-compatible core running at up to 24 MHz with dedicated FIFOs for ISO-7816 UART (T=0/T=1), a linear regulator generating smart card VCC from VPC, and hardware keypad scanning logic for 5×6 matrix. Its I²C master interface enables expansion to external Teridian 73S8010R/C interfaces for multi-slot architectures.

It supports full EMV 4.1 compliance with built-in activation/deactivation sequencers, 7 kV ESD protection on all card interface pins, and programmable LED drivers. The device operates across –40°C to +85°C and requires only a single 6–12 MHz crystal, with internal PLL distributing clocks to all subsystems.

Key Specifications

Pinout & Package

73S1209F-68IM/F is housed in a 68-pin QFN package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per DS_1209F_004 Rev. 1.2, Figures 41 and 43, and Table 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Infineon SLE78CLX2040P and NXP SLJ5200ATK, the 73S1209F-68IM/F uniquely combines UART-to-ISO7816 bridging, hardware 5×6 keypad engine, and I²C-expandable architecture - making it optimal for cost-sensitive, serial-connected PINpad readers needing rapid EMV certification.

Availability

73S1209F-68IM/F is available at Aetrix Electronics and suitable for POS terminals, government e-ID readers, SIM card readers, and vending machine controllers requiring stable component supply and long-term lifecycle support.

Supply support for 73S1209F-68IM/F 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

Teridian Semiconductor Corporation was a fabless IC design company specializing in mixed-signal SoCs for secure transaction systems before its acquisition by Maxim Integrated in 2010.

The 73S1209F-68IM/F belongs to Teridian's 73S12xxF family of self-contained smart card reader ICs, engineered to reduce system complexity and accelerate EMV-certified product development for payment and identification terminals.

FAQ

What is the primary function of the 73S1209F-68IM/F in a smart card system?

The 73S1209F-68IM/F serves as a self-contained UART-to-ISO7816/EMV bridge IC with integrated 80515 CPU, smart card interface, and 5×6 PINpad controller. It handles card activation, T=0/T=1 protocol translation, PIN entry, and host communication - enabling a complete smart card reader solution without external microcontroller support. The 73S1209F-68IM/F is designed for plug-and-play integration into serial-based POS and ID terminals.

Does the 73S1209F-68IM/F support multiple smart card voltages?

Yes, the 73S1209F-68IM/F supports 1.8 V, 3 V, and 5 V smart card operation through an integrated low-dropout linear regulator that generates VCC from the VPC supply (4.75–5.5 V). This eliminates external voltage-switching circuitry and ensures automatic compliance with ISO-7816-3 voltage class detection during card reset. The 73S1209F-68IM/F manages all voltage transitions and timing sequences per EMV 4.1 specifications.

Can the 73S1209F-68IM/F be used without Teridian's turnkey firmware?

Yes, the 73S1209F-68IM/F supports custom firmware development via its JTAG-like emulator port. Customers can implement proprietary applications using Teridian's ANSI C-language API libraries for ISO-7816 and EMV4.1, or leverage the pre-certified PC/SC and CCID firmware. The 73S1209F-68IM/F Flash memory is in-system programmable and lockable, supporting both development and production firmware deployment.

What is the role of the VPC and VDD supplies in the 73S1209F-68IM/F?

VDD (2.7–3.6 V) powers the digital core including the 80515 CPU, UART, I²C, and keypad logic, while VPC (4.75–5.5 V) feeds the on-chip LDO that generates smart card VCC and supplies analog blocks like the voltage comparator. This dual-supply architecture isolates noise-sensitive analog paths from digital switching noise, ensuring reliable card communication and accurate battery monitoring via the VIN pin. The 73S1209F-68IM/F requires both rails to operate fully.

How does the 73S1209F-68IM/F handle keypad input security?

The 73S1209F-68IM/F implements hardware-based keypad scanning with built-in debounce, row/column scrambling, and interrupt-driven key detection - preventing timing-side-channel attacks and reducing software attack surface. Keypad data is processed within the secure boundary of the 73S1209F-68IM/F before transmission to host, and firmware can further encrypt PINs using the on-chip 24 MIPS CPU for AES/DES operations. No external components are needed for secure PIN entry.