Analog Devices Inc./Maxim Integrated 73S8010C-IMR/F

Overview

The 73S8010C-IMR/F from Teridian Semiconductor is a single-chip smart card interface IC compliant with ISO-7816-3 and EMV 4.0, providing 3 V/5 V card power via an inductor-based DC-DC converter, I²C host interface (400 kbps), and full activation/deactivation sequencing - used in POS terminals, set-top boxes, and mobile EMV slots.

For engineers reviewing the 73S8010C-IMR/F datasheet, 73S8010C-IMR/F pinout, 73S8010C-IMR/F application, or 73S8010C-IMR/F equivalent, this page delivers verified electrical compliance, real-time fault handling (VDD/VCC supervision, over-current, over-temperature), and hardware-supported C4/C8 auxiliary I/O for secure transaction systems.

Technical Context

The 73S8010C-IMR/F integrates an ISO-7816-3-compliant sequencer with automated emergency deactivation on card removal or fault detection (VDD drop, VCC fault, 150 mA over-current, >125°C die temperature). Its inductor-based DC-DC converter delivers up to 100 mA at >80% efficiency (VDD = 3.3 V, VCC = 5 V, ICC = 65 mA).

Host communication uses a fast-mode I²C slave interface (400 kbps) with 8-device addressing via SAD0–SAD2 pins and interrupt-driven status reporting (INT active-low). The device supports either crystal oscillator (XTALIN/XTALOUT) or external clock input up to 27 MHz for card CLK generation.

Key Specifications

Pinout & Package

73S8010C-IMR/F is packaged in a 32-pin QFN (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Teridian DS_8010C_024 Rev. 1.5, Section 16.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SLB9670VQ2.0 and ST8024SW, the 73S8010C-IMR/F uniquely combines inductor-based 100 mA power delivery, integrated over-temperature detection, and hardware EMV 4.0 sequencing - making it optimal for certified, high-reliability smart card readers.

Availability

73S8010C-IMR/F is available at Aetrix Electronics and suitable for point-of-sale terminals, set-top box conditional access modules, and mobile EMV readers requiring stable component supply and long-term lifecycle support.

Supply support for 73S8010C-IMR/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 was a fabless analog/mixed-signal IC company acquired by Maxim Integrated in 2010; its smart card interface portfolio emphasized high-efficiency power conversion and EMV-certified reliability.

The 73S8010C-IMR/F belongs to Teridian's smart card interface product line, designed specifically for secure, low-power, standards-compliant reader systems in payment, ID, and conditional access markets.

FAQ

What is the primary function of the 73S8010C-IMR/F in a smart card system?

The 73S8010C-IMR/F serves as a fully integrated smart card interface IC that manages electrical compliance (ISO-7816-3/EMV 4.0), card power generation (3 V/5 V via inductor-based DC-DC), and hardware-controlled activation/deactivation sequencing. It interfaces with the host via I²C and directly drives card signals (I/O, RST, CLK, PRES, AUX1/AUX2), eliminating the need for discrete level shifters or external supervisors. The 73S8010C-IMR/F ensures safe, standards-compliant operation across diverse reader platforms.

Does the 73S8010C-IMR/F support both 3 V and 5 V smart cards?

Yes, the 73S8010C-IMR/F supports both 3 V and 5 V smart cards through software-selectable output voltage. Bit 2 of the Host Control Register configures the DC-DC converter to deliver either 3 V or 5 V to the VCC pin. This selection is fully compliant with ISO-7816-3 voltage class definitions and enables seamless interoperability with legacy and modern cards. The 73S8010C-IMR/F maintains regulation accuracy and fault protection regardless of selected voltage.

How does the 73S8010C-IMR/F handle fault conditions such as over-current or card removal?

The 73S8010C-IMR/F incorporates autonomous hardware fault response: over-current (≥150 mA), over-temperature (>125°C), VDD/VCC undervoltage, or card extraction immediately triggers the ISO-7816-3 deactivation sequence and asserts the active-low INT pin. No host intervention is required - the sequencer shuts down VCC, pulls RST low, stops CLK, and releases I/O within defined timing windows (t1–t4). This behavior is documented in Sections 8–9 of the 73S8010C-IMR/F datasheet and ensures fail-safe card disconnection.

What package type is used for the 73S8010C-IMR/F, and what are its key layout considerations?

The 73S8010C-IMR/F uses a 32-pin QFN package (5 mm × 5 mm, 0.5 mm pitch) with an exposed thermal pad. Critical layout requirements include placing the external 10 µH inductor within 2 mm of the LIN pin (QFN pin 2), using short wide traces for VDD–LIN–VCC paths, and connecting the thermal pad to a solid GND plane for thermal dissipation and noise reduction. The 73S8010C-IMR/F datasheet Figure 11 and Section 15.1 provide mechanical drawings and recommended PCB footprints.

Can the 73S8010C-IMR/F operate from a single lithium coin cell or 3.3 V rail?

Yes, the 73S8010C-IMR/F operates from a single 2.7 V to 3.6 V supply (VDD), making it compatible with 3.3 V regulated rails and single-cell lithium (e.g., CR2032, nominal 3.0 V). Its 2 µA typical power-down current extends battery life significantly, and the inductor-based DC-DC converter maintains >80% efficiency even at low VDD (3.3 V). The 73S8010C-IMR/F has been validated in battery-powered POS and portable readers per its Recommended Operating Conditions table (Section 14.2).