描述 Description

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 banking, identification, pay TV.

特性 Features

? 26 MHz integrated crystal oscillator
? Enhanced ESD protection on card side (> 6 kV)
? Non-inverted control of RST via pin RSTIN
? Clock generation for cards up to 20 MHz (divided by 1, 2, 4 or 8 through CLKDIV1 and CLKDIV2 signals) with synchronous frequency changes
? Supply supervisor for spike-killing during power-on and power-off and power-on reset (threshold fixed internally or externally by a resistor bridge)
? ISO 7816, GSM11.11 and EMV (payment systems) compatibility
? One multiplexed status signal off
? Built-in debounce on card presence contacts
? Thermal and short-circuit protection on all card contacts
? 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 VHandles current spikes of 40 nA up to 20 MHzControls rise and fall timesFiltered overload detection at approximately 120 mA
? Designed to be compatible with the NDS conditional access system
? 3 or 5 V supply for the IC (VDD and GND)
? IC card interface
? DC-DC converter for VCC generation separately powered from a 5 V ± 20% supply (VDDP and PGND)
? Automatic activation and deactivation sequences; initiated by software or by hardware in the event of a short-circuit, card take-off, overheating, VDD or VDDP drop-out
? Three specifically protected half-duplex bidirectional buffered I/O lines to card contacts C4, C7 and C8

簡介

ST8024屬于集成電路（IC）的專用。由制造生產(chǎn)的ST8024專用該系列產(chǎn)品可提供所需的功能，用以將信息源/信宿連到各種復雜或范圍狹窄應用中的傳感器、變送器、致動器、傳輸介質(zhì)或其他此類端點。例如，汽車安全氣囊驅(qū)動器、車身控制和信息娛樂總線、自適應電纜均衡器、智能卡等等。