TDA8034HN/C1,118

接口 - 专用 SMART CARD INTERFACE

Overview

The TDA8034T/TDA8034AT is a cost-effective analog interface for asynchronous and synchronous smart cards operating at 5 V or 3 V. Using few external components, the TDA8034T/TDA8034AT provides all supply, protection and control functions between a smart card and the microcontroller.

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## Features

* Integrated circuit smart card interface in an SO16 package

* 5 V or 3 V smart card supply

* One protected half-duplex bidirectional buffered I/O line C7

* VCC regulation:

* 5 V ± 5 % or 3 V ± 5 % using two low ESR multilayer ceramic capacitors: one of 220 nF and one of 470 nF

* current spikes of 40 nA/s VCC = 5 V and 3 V or 15 nA/s VCC =1.8 V up to 20 MHz, with controlled rise and fall times and filtered overload detection of approximately 120 mA

* Thermal and short-circuit protection for all card contacts

* Automatic activation and deactivation sequences triggered by a short-circuit, card take-off, overheating, falling VDD, VDDINTF or VDDP

* Enhanced card-side ElectroStatic Discharge ESD protection of > 6 kV

* External clock input up to 26 MHz connected to pin XTAL1

* Card clock generation up to 20 MHz using pin CLKDIV1 with synchronous frequency changes of:

* 1/2 fxtal or 1/4 fxtal on TDA8034T

* fxtal or 1/2 fxtal on TDA8034AT

* Non-inverted control of pin RST using pin RSTIN

* Compatible with ISO 7816, NDS and EMV 4.2 payment systems

* Supply supervisor for killing spikes during power on and off:

* using a fixed threshold

* using an external resistor bridge with threshold adjustment

* Built-in debouncing on card presence contacts typically 4.5 ms

* Multiplexed status signal using pin OFFN

## Target Applications

* Pay TV

* Electronic payment

* Identification

* Bank card readers

## Features