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LTC4556 PDF预览

LTC4556

更新时间： 2023-12-20 18:45:54
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
22页 263K
描述
具串行控制功能的智能卡接口

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中文翻译

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LTC4556 数据手册

 浏览型号LTC4556的Datasheet PDF文件第2页浏览型号LTC4556的Datasheet PDF文件第3页浏览型号LTC4556的Datasheet PDF文件第4页浏览型号LTC4556的Datasheet PDF文件第5页浏览型号LTC4556的Datasheet PDF文件第6页浏览型号LTC4556的Datasheet PDF文件第7页 
LTC4556  
Smart Card Interface  
with Serial Control  
FeaTures  
DescripTion  
The LTC®4556 provides all necessary power control, level  
translation and supervisory functions for a smart card or  
S.A.M.cardinterface.Thepartcontainsalownoisecharge  
n
Electrical Specifications Are ISO7816-3 and EMV  
Compatible  
n
Control/Status Serial Port May be Daisy-Chained  
for Multicard Applications  
Automatic Shutdown on Electrical Faults  
pump plus LDO for generating V power, as well as all  
necessary level shifting circuitry.  
CC  
n
n
Buck Boost Charge Pump Generates 5V, 3V or 1.8V  
The card voltage can be set to either 1.8V, 3V or 5V. The  
LTC4556includesacarddetectionchannelwithautomatic  
debounce circuitry. To reduce wiring costs, the LTC4556  
interfaces to a microcontroller via a simple 4‑wire serial  
interface.Multipledevicesmaybeconnectedindaisy‑chain  
fashion so that the number of wires to the card socket  
board is independent of the number of sockets. Status  
data is returned over the same interface.  
Outputs (Smart Card Classes A, B and C)  
n
Automatic Level Translation  
n
Dynamic Pull‑Ups Deliver Fast Signal Rise Times  
n
Supervisory Functions Prevent Smart Card Faults  
n
Low Operating Current: 250µA Typical  
n
V : 2.7V to 5.5V  
IN  
n
n
n
Ultralow Shutdown Current  
>10kV ESD on Smart Card Pins  
Small 24‑Lead 4mm × 4mm QFN Package  
Extensive security features ensure proper deactivation  
sequencing in the event of a supply fault or a smart card  
electrical fault. The smart card pins can withstand greater  
than 10kV ESD in‑situ with no additional components.  
The LTC4556 is available in a small, low profile (0.75mm),  
4mm × 4mm QFN package.  
applicaTions  
n
Handheld Payment Terminals  
n
Pay Telephones  
n
ATM Machines  
POS Terminals  
Computer Keyboards  
Multiple S.A.M. Sockets  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property  
of their respective owners. Protected by U.S. Patents, including 6356140, 6411531.  
n
n
n
Typical applicaTion  
240k  
180k  
20  
Deactivation Sequence  
UNDERV  
1
19  
DV  
PRES  
CC  
10  
V
BATT  
INPUT  
POWER  
0.1µF  
1µF  
LTC4556  
18  
17  
16  
15  
14  
13  
RST  
8
6
C8  
C4  
GND  
5V/DIV  
I/O  
FAULT  
CLK  
5V/DIV  
RST  
CLK  
21  
22  
23  
24  
D
D
IN  
SMART CARD  
4-WIRE  
COMMAND  
INTERFACE  
V
CC  
OUT  
SCLK  
1µF  
I/O  
5V/DIV  
LD  
4556 TA01  
V
2
3
4
5
CC  
DATA  
5V/DIV  
4-WIRE  
CARD  
INTERFACE  
R
IN  
4556 G11.eps  
10µs/DIV  
SYNC  
ASYNC  
+
C
–
C
CPO  
11  
9
12  
1µF  
1µF  
4556fb  
1
For more information www.linear.com/LTC4556  
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