The Teridian 73S8024RN is a low-cost smart card interface IC that meets the ISO-7816-3, EMV 4.0, and NDS specifications. It can be controlled by a dedicated control bus and provides card presence and fault notification to the system controller. The card clock can be generated by an on-chip oscillator using an external crystal or a clock signal. The 73S8024RN includes an ISO-7816-3 activation/deactivation sequencer that controls the card signals. Level-shifters drive the card signals with the selected card voltage (3V or 5V) from an internal Low Drop-Out (LDO) voltage regulator. With its embedded LDO regulator, the 73S8024RN is a cost-effective solution for applications with a 5V power supply. Hardware support for auxiliary I/O lines, C4 / C8 contacts, is provided. Emergency card deactivation is initiated upon card extraction or any fault generated by the protection circuitry.
The 73S8024RN is a single smart‑card (ICC) interface IC designed for full electrical compliance with ISO‑7816‑3, EMV 4.0 and NDS specifications. It is controlled via a dedicated digital bus and includes an on‑chip LDO regulator that can supply either 3 V or 5 V to the card.
Key features include true current‑over‑current detection (150 mA max), adjustable Vpp fault threshold, up to 20 MHz card clock, and extensive digital I/O for activation, reset, clock control and interrupt reporting. The device is offered in 20‑pin and 32‑pin QFN packages (4 × 4 × 0.85 mm for the 20QFN).
| Card voltage output | 3 V / 5 V selectable |
|---|---|
| Card current capability | ≥ 90 mA |
| Over‑current detection | 150 mA max |
| Card clock frequency | up to 20 MHz |
| Regulator power‑supply range | 4.75 V‑5.5 V (EMV 4.0), 4.85 V‑5.5 V (NDS) |
| Digital I/O voltage range | 2.7 V‑5.5 V |
| ESD protection on card interface | 6 kV |
| Package options | 20‑pin QFN (4×4×0.85 mm) or 32‑pin QFN |
It complies with ISO‑7816‑3, EMV 4.0 and NDS specifications.