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LTC1955EUH#TR PDF预览

LTC1955EUH#TR

更新时间： 2024-09-25 20:02:59
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
20页 250K
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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LTC1955EUH#TR 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC32,.2SQ,20
针数：32Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.16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：e0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）：235
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：Tin/Lead (Sn/Pb)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：20宽度：5 mm
Base Number Matches：1

LTC1955EUH#TR 数据手册

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LTC1955  
Dual Smart Card Interface  
with Serial Control  
U
FEATURES  
DESCRIPTIO  
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.  
■
Compatible with ISO7816-3 and EMV Electrical  
Specifications  
■
Power Management and Control for Two Smart  
Cards  
■
Control/Status Serial Port May be Daisy-Chained  
for Multicard Applications  
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 daisy-chain fashion so that the number of wires to the  
card socket board is independent of the number of sock-  
ets. Status data is returned over the same interface.  
■
Automatic Shutdown on Electrical Faults  
■
Buck/Boost Charge Pump Generates 5V, 3V or 1.8V  
Outputs (Smart Card Classes A, B and C)*  
■
Independent 5V/3V/1.8V Level Control for Both Cards  
■
Automatic Level Translation  
■
Supervisory Functions Prevent Smart Card Faults  
■
Low Operating Current: 250µA Typical  
Ultralow Shutdown Current  
>10kV ESD on Smart Card Pins  
Small 32-Pin 5mUm × 5mm 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 LTC1955 is available in a low profile (0.75mm) 5mm  
× 5mm QFN package.  
APPLICATIO S  
■
Handheld Payment Terminals  
■
Pay Telephones  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
*Protected by U.S. Patents including 6356140, 6411531.  
■
ATM Machines  
■
POS Terminals  
■
Computer Keyboards  
■
Multiple S.A.M. Sockets  
U
240k  
180k  
TYPICAL APPLICATIO  
23  
CARD  
DETECT  
UNDERV  
1
2
DV  
PRES A  
CC  
12,13  
Deactivation Sequence  
V
BATT  
INPUT  
POWER  
0.1µF  
4.7µF  
LTC1955  
3
4
5
6
7
8
9, 10  
24  
C8A  
C4A  
GND  
RST A  
5V/DIV  
I/O A  
FAULT  
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  
LD  
1µF  
21  
PRES B  
I/O A  
5V/DIV  
29  
30  
32  
31  
22  
20  
19  
18  
17  
DATA  
I/O B  
RST B  
CLK B  
V
CCA  
5V/DIV  
4-WIRE  
CARD  
INTERFACE  
R
IN  
SYNC  
VENDOR CARD  
10µs/DIV  
1955 G11.eps  
ASYNC  
NC/NO  
V
CCB  
1µF  
+
–
C
C
CPO  
15  
1955 TA01  
14  
11  
4.7µF  
1µF  
1955fa  
1
1234567...20

中文翻译

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