CXRS3108是一个完整且经济的异步模拟接口
3或5伏智能卡。它可以放置在卡和微控制器之间
执行所有供电、保护和控制功能。很少有外部组件
是必需的
◆IC卡接口
◆IC（VDD和GND）的3或5 V电源
◆三个特别保护的半双工双向缓冲I/O
卡触点C4、C7和C8的线路
◆用于VCC产生的DC/DC转换器，分别由5 V±20%电源供电
（VDDP和PGND）
◆3或5 V±5%调节卡供电电压（VCC），具有适当的去耦功能，具有以下功能：
-VDDP=4至6.5 V时，ICC<80毫安
-处理高达20兆赫的40个nAs的当前峰值
-控制上升和下降时间
-在大约120毫安时过滤过载检测
◆所有卡触点的热保护和短路保护
◆自动激活和失活序列；由软件或
发生短路、卡取出、过热、VDD时的硬件
或VDDP退出
？？加强卡侧ESD保护（>6KV）
◆26兆赫集成晶体振荡器
◆同步频率变化的高达20 MHz（通过CLKDIV1和CLKDIV2信号除以1、2、4或8）的卡时钟生成
-
[ CXRS3108 ]
目录
1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（PDF文档）
一.产品概述
The CXRS3108 is a complete and cost-efficient analog interface for asynchronous
3 or 5 V smart cards. It can be placed between the card and the microcontroller to
perform all supply, protection and control functions. Very few external components
are required
二.产品特点
◆IC card interface
◆3 or 5 V supply for the IC (VDD and GND)
◆Three specifically protected half-duplex bidirectional buffered I/O
lines to card contacts C4, C7 and C8
◆DC/DC converter for VCC generation separately powered from a 5 V ± 20% supply
(VDDP and PGND)
◆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 V
- Handles current spikes of 40 nAs up to 20 MHz
- Controls rise and fall times
- Filtered overload detection at approximately 120 mA
◆Thermal and short-circuit protection on all card contacts
◆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
◆Enhanced ESD protection on card side (>6 kV)
◆26 MHz integrated crystal oscillator
◆Clock generation for cards up to 20 MHz (divided by 1, 2, 4 or 8 through CLKDIV1 and CLKDIV2 signals) with synchronous frequency changes
◆Non-inverted control of RST via pin RSTIN
◆ISO 7816, GSM11.11 and EMV (payment systems) compatibility
◆Supply supervisor for spike-killing during power-on and power-off and Power-on reset (threshold fixed internally or externally by a resistor bridge)
◆Built-in debounce on card presence contacts
◆One multiplexed status signal OFF
◆Package:SOP28
三.应用范围
◆IC card readers for banking
◆Electronic payment
◆Identification
◆Pay TV
四.技术规格书（产品PDF)
需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！
五.产品封装图
六.电路原理图
七.相关芯片选择指南
| 标准智能卡接口电路(Standard Smart Card Interface) | ||||
| Part No. | Features | VDD | Package | Reference |
| CXRS3108 | Analog Interface For Asynchronous 3 Or 5V Smart Cards | 2.7~6.5V | SOP28 | TDA8024 |
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