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Datasheet > LTC1955IUH#TRPBF
LTC1955IUH#TRPBF PDF预览

LTC1955IUH#TRPBF

更新时间： 2024-09-25 19:42:19
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
22页 359K
描述
LTC1955 - Dual Smart Card Interface with Serial Control; Package: QFN; Pins: 32; Temperature Range: -40°C to 85°C

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中文翻译

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LTC1955IUH#TRPBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC32,.2SQ,20
针数：32Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.15可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：S-PQCC-N32
JESD-609代码：e3长度：5 mm
湿度敏感等级：1信道数量：2
功能数量：1端子数量：32
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装等效代码：LCC32,.2SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
电源：1.8/5,3/5 V认证状态：Not Qualified
座面最大高度：0.8 mm子类别：Power Management Circuits
最大供电电压 (Vsup)：5.5 V最小供电电压 (Vsup)：2.7 V
标称供电电压 (Vsup)：3.3 V表面贴装：YES
技术：CMOS温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：30宽度：5 mm
Base Number Matches：1

LTC1955IUH#TRPBF 数据手册

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LTC1955  
Dual Smart Card Interface  
with Serial Control  
FeaTures  
DescripTion  
The LTC®1955 provides all necessary supervisory and  
power control functions for two smart cards, two S.A.M.  
cards or a combination of S.A.M. and smart cards. It  
provides a charge pump for battery-powered applications  
as well as all necessary level shifting circuitry.  
n
Compatible with ISO7816-3 and EMV Electrical  
Specifications  
n
Power Management and Control for Two Smart Cards  
n
Control/Status Serial Port May Be Daisychained for  
Multicard Applications  
Automatic Shutdown on Electrical Faults  
n
The card voltages can be independently set to 1.8V, 3V or  
5V. Both card interfaces include a card detection channel  
withautomaticdebouncecircuitry.Toreducewiringcosts,  
the LTC1955 interfaces to a microcontroller via a simple  
4-wire serial interface. Multiple devices may be connected  
in daisychain fashion so that the number of wires to the  
cardsocketboardisindependentofthenumberofsockets.  
Status data is returned over the same interface.  
n
Buck/Boost Charge Pump Generates 5V, 3V or 1.8V  
Outputs (Smart Card Classes A, B and C)  
n
Independent 5V/3V/1.8V Level Control for Both Cards  
n
Automatic Level Translation  
n
Supervisory Functions Prevent Smart Card Faults  
n
Low Operating Current: 250µA Typical  
n
Ultralow Shutdown Current  
>10kV ESD on Smart Card Pins  
n
n
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.  
Small 32-Lead 5mm × 5mm QFN Package  
applicaTions  
n
Handheld Payment Terminals  
n
Pay Telephones  
The LTC1955 is available in a low profile (0.75mm) 5mm  
× 5mm QFN package.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents, including 6356140, 6411531.  
n
ATM Machines  
POS Terminals  
Computer Keyboards  
Multiple S.A.M. Sockets  
n
n
n
240k  
180k  
Typical applicaTion  
23  
CARD  
DETECT  
UNDERV  
1
2
DV  
PRES A  
CC  
12,13  
V
BATT  
INPUT  
POWER  
0.1µF  
4.7µF  
LTC1955  
Deactivation Sequence  
3
4
5
6
7
8
9, 10  
24  
C8A  
C4A  
GND  
I/O A  
FAULT  
RST A  
5V/DIV  
RST A  
CLK A  
27  
28  
26  
25  
D
D
IN  
SMART CARD  
CLK A  
5V/DIV  
4-WIRE  
COMMAND  
INTERFACE  
V
OUT  
CCA  
SCLK  
1µF  
21  
LD  
PRES B  
I/O A  
5V/DIV  
V
CCA  
5V/DIV  
29  
30  
32  
31  
22  
20  
19  
18  
17  
DATA  
I/O B  
RST B  
CLK B  
4-WIRE  
CARD  
INTERFACE  
1955 TA01a  
R
IN  
SYNC  
10µs/DIV  
VENDOR CARD  
ASYNC  
NC/NO  
V
CCB  
1µF  
+
–
C
C
CPO  
15  
1955 TA01b  
14  
11  
1µF  
4.7µF  
1955fd  
1
For more information www.linear.com/LTC1955  
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