NXP TDA8034HN智能卡模拟接口解决方案

NXP 公司的TDA8034HN是高性价比的同步和异步智能卡模拟接口,工作电压5V,3V或1.8V,外接元件很少,在智能卡和微控制器间提供电源,保护和控制功能,主要用在付费电视,电子支付,身份识别和银行卡阅读器.本文介绍了TDA8034HN主要特性,方框图以及典型应用框图.
TDA8034HN Smart card interface
The TDA8034HN is a cost-effective analog interface for asynchronous and synchronous smart cards operating at 5 V, 3 V or 1.8 V. Using few external components, the
TDA8034HN provides all supply, protection and control functions between a smart card and the microcontroller.
TDA8034HN主要特性:
Integrated circuit smart card interface in an HVQFN24 package
5 V, 3 V or 1.8 V smart card supply
Very low power consumption in Deep Shutdown mode
Three protected half-duplex bidirectional buffered I/O lines (C4, C7 and C8)
VCC regulation:
5 V, 3 V or 1.8 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 pins CLKDIV1 and CLKDIV2 with synchronous frequency changes of fxtal, 1∨2 fxtal, 1∨4 fxtal or 1∨8 fxtal
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 8 ms)
Multiplexed status signal using pin OFFN
TDA8034HN应用: