ST8004CDR STMicroelectronics

ST8004 Smartcard interface General features 3V or 5V supply for the IC Step-up converter for V generation CC 3 specific protected half duplex bi-directional buffered I/O lines Automatic activation and deactivation sequences SO-28 Thermal and short-circuit protections on all card contacts 26MHz integrated crystal oscillator Clock generation for the card up to 20MHz with synchronous frequency changes Description ISO7816-3 compatible The ST8004 is a complete low cost analog Enhanced ESD protection on card side interface for asynchronous 3V and 5V smart SO-28 package cards. It can be placed between the card and the microcontroller with few external components to Under voltage lockout protection selectable to perform all supply protection and control 3V or 2.2V functions. Main applications are: smartcard Supply supervisor integrated readers for Set Top Box, IC card readers for banking, identification. Order code Part number Temperature range Package Packaging ST8004CDR 0 to 85 C SO-28 (Tape & Reel) 1000 parts per reel January 2007 Rev 7 1/26 www.st.com 26Contents ST8004 Contents 1 Diagram . 3 2 Pin configuration 4 3 Maximum ratings 6 4 Electrical characteristics . 7 5 Waveforms 12 6 Functional description 15 6.1 Power supply 15 6.2 Voltage supervisor (for VTHSEL = VDD or floating) . 15 6.3 Voltage supervisor (for VTHSEL = GND) . 15 6.4 Clock circuitry 16 6.5 I/O Circuitry . 16 6.6 Inactive state 17 6.7 Activation sequence . 17 6.8 Active state 17 6.9 Deactivation sequence . 18 6.10 Fault detection . 18 7 Package mechanical data 22 8 Revision history . 25 2/26