The 73S8010C is a single smart card interface IC from Teridian. It meets ISO-7816-3 and EMV 4.0 specifications. It interfaces with the host through the two-wire I2C bus. Data exchange with the card is managed from the system controller using the I/O line (and eventually the auxiliary I/O lines). An on-chip oscillator using an external crystal, or connection to a clock signal coming from the system controller can generate the card clock signal. The 73S8010C IC incorporates an ISO-7816-3 activation/deactivation sequencer that controls the card signals. Level shifters drive the card signals with the selected card voltage (3 V or 5 V), coming from an internal DC-DC converter. With its high-efficiency DC-DC converter, the Teridian 73S8010C is a cost-effective solution for any smart card reader application to be powered from a single 2.7 V to 3.6 V power supply. Hardware support for auxiliary I/O lines, C4 / C8 contacts, is provided. Emergency card deactivation is initiated upon card extraction or upon any fault generated by the protection circuitry. The fault can be a VDD (digital power supply), a VCC (card power supply), a card over-current, or an over-heating fault.
The 73S8010C smart‑card interface IC from Teridian Semiconductor provides full electrical compliance with ISO‑7816‑3 and EMV 4.0 specifications. It connects to a host controller via a two‑wire I²C bus and supports card communication through dedicated I/O lines.
Key features include an on‑chip inductor‑based DC‑DC converter delivering 3 V or 5 V to the card, fast‑mode 400 kHz I²C operation, up to eight devices on the same bus, and a compact 5 × 5 mm 32‑QFN package option. The device offers emergency card de‑activation, over‑current and over‑temperature protection, and auxiliary I/O lines for extended functionality.
| Host interface | Two‑wire I²C, fast mode 400 kHz |
|---|---|
| Card power supply voltage (Vpp) | 2.7 V to 3.6 V |
| Maximum card current | 100 mA (150 mA over‑current detection) |
| DC‑DC converter efficiency | > 80 % at Vpp = 3.3 V |
| Package options | 28‑pin SO or 32‑pin QFN (5 × 5 mm) |
It uses a two‑wire I²C bus operating in fast mode at up to 400 kHz.
The card power supply (Vpp) operates from 2.7 V to 3.6 V.
Up to eight devices can be connected in parallel on the I²C bus.
The IC can supply up to 100 mA continuously, with over‑current detection up to 150 mA.