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

Overview

73S8010C-IM/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. It supports up to 100 mA card supply current, 6 kV ESD protection on card I/O, and operates from a 2.7–3.6 V system supply - used in POS terminals, set-top boxes, and mobile EMV slots.

For engineers reviewing the 73S8010C-IM/F datasheet, 73S8010C-IM/F pinout, 73S8010C-IM/F application, or 73S8010C-IM/F equivalent, key selection criteria include its dual-voltage card power capability, integrated over-current/over-temperature fault handling, I²C address configurability (up to 8 devices), and support for C4/C8 auxiliary contacts in compact 32-QFN packaging.

Technical Context

The 73S8010C-IM/F implements a digital ISO-7816-3 sequencer with hardware-triggered emergency deactivation on card removal or fault detection (VDD/VCC undervoltage, >150 mA over-current, or die over-temperature). Its inductor-based DC-DC converter delivers >80% efficiency at 3.3 V input and 5 V/65 mA output, enabling battery-powered operation without external charge pumps.

Host communication uses a fast-mode I²C slave interface with three address-select pins (SAD0–SAD2), interrupt-driven status reporting (INT active-low), and register-mapped control/status access. The device accepts either an external crystal (XTALIN/XTALOUT) or system clock up to 27 MHz for card CLK generation, with programmable clock division (×1, ×2, ×4, ×8).

Key Specifications

Pinout & Package

73S8010C-IM/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 and Figure 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SLB9670HT12FW and ST8020B, the 73S8010C-IM/F uniquely combines I²C simplicity, integrated inductor-based DC-DC conversion, EMV 4.0 compliance, and C4/C8 support - making it optimal for compact, battery-aware, standards-certified smart card readers where minimal external components and deterministic timing are required.

Availability

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

Supply support for 73S8010C-IM/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 specializing in metering, power management, and secure interface solutions before its acquisition by Maxim Integrated in 2010.

The 73S8010C product line was designed specifically for cost-effective, standards-compliant smart card reader implementations - emphasizing integration of power, timing, protection, and host interface in a single chip for consumer, industrial, and payment applications.

FAQ

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

The 73S8010C-IM/F serves as a dedicated smart card physical layer interface IC. It manages all electrical aspects of ISO-7816-3 communication: generating regulated 3 V or 5 V card power via its inductor-based DC-DC converter, supplying programmable clock (CLK), asserting reset (RST), handling bidirectional I/O and auxiliary contacts (AUX1/AUX2), and executing standardized activation/deactivation sequences - all under I²C host control.

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

Yes, the 73S8010C-IM/F supports both 3 V and 5 V smart cards. The output voltage on the VCC pin is selected via bit 2 of the Host Control Register: setting the bit configures 3 V output, clearing it configures 5 V output. This selection is fully compliant with ISO-7816-3 voltage class definitions and enables seamless interoperability with legacy and modern cards in the same reader design.

How does the 73S8010C-IM/F handle card insertion and removal events?

The 73S8010C-IM/F uses the PRES pin (active-high card presence input) to detect insertion and removal. Upon rising edge (insertion), it asserts the INT pin low and sets the PRES bit in the Status Register. Upon falling edge (removal), it triggers an emergency deactivation sequence - powering down VCC, driving RST/CLK/I/O low, and setting PROT and ACTIVE bits accordingly - all without host intervention, ensuring safe card ejection.

What external components are required for the 73S8010C-IM/F DC-DC converter?

The 73S8010C-IM/F DC-DC converter requires three key external components: a 10 µH inductor connected between LIN and VDD, a 3.3 µF X5R/X7R ceramic capacitor (ESR < 100 mΩ) on VCC for EMV 4.0 compliance, and two VDD decoupling capacitors (100 nF + 10 µF) placed near the LIN pin. No external diodes, MOSFETs, or compensation networks are needed - the converter is fully integrated.

Can the 73S8010C-IM/F operate from a 3.3 V supply while delivering 5 V to the smart card?

Yes, the 73S8010C-IM/F can operate from a 3.3 V VDD supply and deliver regulated 5 V to the smart card via its step-up DC-DC converter. At VDD = 3.3 V and VCC = 5 V with 65 mA load, the converter achieves >80% efficiency. The device automatically switches between step-up and linear regulation modes depending on VDD–VCC differential, ensuring stable output across its full 2.7–3.6 V input range.