ST8024 - STMicroelectronics

ST8024 SMARTCARD INTERFACE

The ST8024 is a complete low cost analog interface for asynchronous 3 V and 5 V smart cards. It can be placed between the card and the microcontroller with few external components to perform all supply protection and control functions. ST8024 is a direct replacement of ST8004. Main applications are: smartcard readers for settop-box, IC card readers for banki.

Features

■ Designed to be compatible with the NDS conditional access system
■ IC card interface
■ 3 or 5 V supply for the IC (VDD and GND)
■ Three specifically protected half-duplex bi- directional buffered I/O lines to card contacts C4, C7 and C8
■ DC-DC converter for VCC generation separately powered from a 5 V ± 20% supply (VDDP and PGND)
■ 3 or 5 V ± 5 % regulated card supply voltage (VCC) with appropriate decoupling has the following capabilities:
  – ICC < 80 mA at VDDP = 4 to 6.5 V
  – Handles current spikes of 40 nA up to 20 MHz
  – Controls rise and fall times
  – Filtered overload detection at approx.