The Teridian 73S8009CN is the world’s first single-chip smart card electrical interface circuit that supports all types of smart cards: 5V, 3V and 1.8V, including traditional ISO-7816-3 asynchronous and synchronous type 1 and type 2, as well as USB, ISO-7816-12 cards. It is ideally suited for applications such as desktop computers, laptops and general purpose smart card readers that require low power operation from a single 2.7V to 6.5V power supply voltage source. It provides control, conversion and regulation of power for the smart card. In addition, the circuit provides a 3.3V-regulated voltage that is used as an internal digital supply voltage to the host interface. It is also made available to supply power to some external circuitry (a host controller for instance).
The 73S8009CN is a single‑chip smart‑card interface IC that supports ISO‑7816‑3 asynchronous and synchronous cards as well as ISO‑7816‑12 USB smart cards. It operates from a single 2.7 V to 6.5 V supply and provides selectable card voltages of 1.8 V, 3 V or 5 V, with low‑power OFF mode (10 nA typical).
The datasheet includes a functional block diagram, a 32‑pin QFN pinout, absolute maximum ratings, recommended operating conditions, electrical characteristics, timing diagrams, and ordering information. Contact details for Teridian Semiconductor Corporation are provided for further assistance.
| Selectable card voltage | 1.8 V, 3 V or 5 V |
|---|---|
| Maximum card current (3 V/5 V) | 65 mA |
| Maximum card current (1.8 V) | 40 mA |
| Card clock frequency | up to 20 MHz |
| ESD protection on card interface | 6 kV |
| Over‑current detection limit | 150 mA max |
| Supply voltage range | 2.7 V to 6.5 V |
| Package | 32‑pin QFN (5 mm × 5 mm) |
It supports selectable card voltages of 1.8 V, 3 V, or 5 V.
It can provide up to 65 mA to 3 V and 5 V cards.
The card clock can run up to 20 MHz.