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LTC4557

更新时间： 2024-11-12 14:57:47
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
12页 224K
描述
双 SIM 卡 / 智能卡电源和接口

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中文翻译

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LTC4557 数据手册

 浏览型号LTC4557的Datasheet PDF文件第2页浏览型号LTC4557的Datasheet PDF文件第3页浏览型号LTC4557的Datasheet PDF文件第4页浏览型号LTC4557的Datasheet PDF文件第5页浏览型号LTC4557的Datasheet PDF文件第6页浏览型号LTC4557的Datasheet PDF文件第7页 
LTC4557  
Dual SIM/Smart Card  
Power Supply and Interface  
U
FEATURES  
DESCRIPTIO  
TheLTC®4557providespowerconversionandsignallevel  
translation needed for 2.5G and 3G cellular telephones to  
interface with 1.8V or 3V subscriber identity modules  
(SIMs). The part meets all requirements for 1.8V and 3V  
SIMs. The part contains LDO regulators to power 1.8V or  
3V SIM cards from a 2.7V to 5.5V input. The output  
voltages can be set using the two voltage selection pins  
and up to 50mA of load current can be supplied.  
■
Power Management and Signal Level Translators  
for Two SIM Cards or Smart Cards  
■
Independent 1.8V/3V VCC Control for Both Cards  
■
Automatic Level Translation  
ISO7816, ETSI and EMV Compatible  
■
■
Dynamic Pull-Ups Deliver Fast Signal Rise Times*  
■
Built-In Fault Protection Circuitry  
■
Automatic Activation/Deactivation Sequencing  
Circuitry  
Internal level translators allow controllers operating with  
supplies as low as 1.2V to interface with 1.8V or 3V smart  
cards. Battery life is maximized by a low operating current  
of less than 100µA and a shutdown current of less than  
1µA. Board area is minimized by the low profile 3mm ×  
3mm × 0.75mm leadless QFN package.  
■
Low Operating/Shutdown Current  
■
>10kV ESD on SIM Card Pins  
■
Compatible with EMV Fault Tolerance Requirements  
■
Available in 16-LUead (3mm × 3mm) QFN Package  
APPLICATIO S  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
■
GSM and 3G Cellular Phones  
*U.S. Patent No. 6,356,140  
■
Wireless P.O.S. Terminals  
■
Multiple SAM Card Interface  
U
TYPICAL APPLICATIO  
DV  
V
BATT  
CC  
1.2V TO 4.4V 3V TO 6V  
DV  
CC  
0.1µF  
0.1µF  
Deactivation Sequence  
DV  
V
CC  
BATT  
I/OA  
C7  
C2  
C3  
C1  
CLKIN  
RSTIN  
DATA  
I/O  
RSTX  
RSTA  
CLKA  
RST  
CLK  
1.8V/3V  
SIM  
5V/DIV  
CARD  
CLKX  
5V/DIV  
V
V
CC  
CCA  
GND  
µCONTROLLER  
LTC4557  
1µF  
1µF  
C5  
GND  
I/OX  
5V/DIV  
C1  
C3  
C2  
C7  
V
CCX  
V
V
CC  
CCB  
2V/DIV  
ENABLE  
M0  
CLKB  
CLK  
RST  
I/O  
1.8V/3V  
SMART  
CARD  
4557 G07  
C
= 1µF  
10µs/DIV  
VCCX  
RSTB  
I/OB  
M1  
GND  
C5  
4557 TA01  
4557f  
1
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