描述 Description

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.

特性 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, VDD(INTF) 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 ApplicationsPay TV
Electronic payment
Identification
Bank card readers

應(yīng)用 Application

Pay TV
Electronic payment
Identification
Bank card readers