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LTC4556EUF PDF预览

LTC4556EUF

更新时间: 2024-02-09 00:18:56
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
20页 243K
描述
Smart Card Interface with Serial Control

LTC4556EUF 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,
针数:24Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.31可调阈值:NO
模拟集成电路 - 其他类型:POWER SUPPLY SUPPORT CIRCUITJESD-30 代码:S-PQCC-N24
JESD-609代码:e3长度:4 mm
湿度敏感等级:1信道数量:1
功能数量:1端子数量:24
最高工作温度:70 °C最低工作温度:
封装主体材料:PLASTIC/EPOXY封装代码:HVQCCN
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):250认证状态:Not Qualified
座面最大高度:0.8 mm最大供电电压 (Vsup):5.5 V
最小供电电压 (Vsup):1.7 V标称供电电压 (Vsup):3.3 V
表面贴装:YES温度等级:COMMERCIAL
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:NOT SPECIFIED宽度:4 mm

LTC4556EUF 数据手册

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LTC4556  
Smart Card Interface  
with Serial Control  
U
FEATURES  
DESCRIPTIO  
The LTC®4556 provides all necessary power control, level  
translation and supervisory functions for a smart card or  
S.A.M.cardinterface.Thepartcontainsalownoisecharge  
pump** plus LDO for generating VCC power, as well as all  
necessary level shifting circuitry.  
Electrical Specifications Are ISO7816-3 and EMV  
Compatible  
Control/Status Serial Port May be Daisy-Chained  
for Multicard Applications  
Automatic Shutdown on Electrical Faults  
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. 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 sockets.  
Status data is returned over the same interface.  
Outputs (Smart Card Classes A, B and C)  
Automatic Level Translation  
Dynamic Pull-Ups Deliver Fast Signal Rise Times*  
Supervisory Functions Prevent Smart Card Faults  
Low Operating Current: 250µA Typical  
VIN: 2.7V to 5.5V  
Ultralow Shutdown Current  
>10kV ESD on Smart Card Pins  
Small 24-Pin 4mUm × 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.  
APPLICATIO S  
Handheld Payment Terminals  
Pay Telephones  
ATM Machines  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
*U.S. Patent No. 6,356,140  
**U.S. Patent No. 6,411,531  
POS Terminals  
Computer Keyboards  
Multiple S.A.M. Sockets  
U
TYPICAL APPLICATIO  
240k  
180k  
20  
UNDERV  
Deactivation Sequence  
1
19  
DV  
PRES  
CC  
10  
V
BATT  
INPUT  
POWER  
0.1µF  
1µF  
LTC4556  
18  
17  
16  
15  
14  
13  
8
6
C8  
C4  
RST  
5V/DIV  
GND  
I/O  
FAULT  
RST  
CLK  
CLK  
21  
22  
23  
24  
D
D
IN  
5V/DIV  
SMART CARD  
4-WIRE  
COMMAND  
INTERFACE  
V
CC  
OUT  
SCLK  
LD  
1µF  
I/O  
5V/DIV  
4556 TA01  
V
CC  
5V/DIV  
2
3
4
5
DATA  
4-WIRE  
CARD  
INTERFACE  
R
IN  
10µs/DIV  
4556 G11.eps  
SYNC  
ASYNC  
+
C
C
CPO  
11  
9
12  
1µF  
1µF  
4556f  
1

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