深圳市广辉电子有限公司

NXP的TDA8004T是用于异步智能卡的完整的低成本模拟接口,它是在智能卡和微控制器之间,几乎不需要外接元件就能实现所有的电源保护和控制功能.本解决方案给出了TDA8004A的主要特性与应用,以及应用电路图.

应用:
IC card readers for banking
Electronic payment
Identification
Pay TV

特性Features:
n 3 V or 5 V supply for the IC (GND and VDD)
n Step-up converter for VCC generation (separately powered with a 5 V ± 10 % supply,
VDDP and PGND)
n 3 specific protected half duplex bidirectional buffered I/O lines (C4, C7 and C8)
n VCC regulation 5 V ± 5 % on 2 ´ 100 nF or 1 ´ 100 nF and 1 ´ 220 nF multilayer
ceramic capacitors with low Equivalent Series Resistance (ESR), ICC < 65 mA at
4.5 V < VDDP < 6.5 V, current spikes of 40 nAs up to 20 MHz, with controlled rise and
fall times, filtered overload detection approximately 90 mA)
n Thermal and short-circuit protections on all card contacts
n Automatic activation and deactivation sequences (initiated by software or by hardware
in the event of a short-circuit, card take-off, overheating or supply drop-out)
n Enhanced ElectroStatic Discharge (ESD) protection on card side (> 6 kV)
n 26 MHz integrated crystal oscillator
n Clock generation for the card up to 20 MHz (divided by 1, 2, 4 or 8 through CLKDIV1
and CLKDIV2 signals)
n Non-inverted control of RST via pin RSTIN
n ISO 7816, GSM11.11 and EMV (payment systems) compatibility
n Supply supervisor for spikes killing during power-on and power-off
n One multiplexed status signal OFF
框图：

应用电路：

脚定义：