Datasheet > 暂无类别数据> LTC1955EUH

LTC1955EUH

更新时间： 2024-09-23 22:55:51

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
20页	249K
描述
Dual Smart Card Interface with Serial Control

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LTC1955EUH 数据手册

LTC1955

Dual Smart Card Interface

with Serial Control

DESCRIPTIO

FEATURES

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 5m}U^{m × 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 small 5mm × 5mm QFN

package.

APPLICATIO S

■

Handheld Payment Terminals

■

Pay Telephones

, LTC and LT are registered trademarks of Linear Technology Corporation.

*U.S. Patent No. 6,411,531

■

ATM Machines

■

POS Terminals

■

Computer Keyboards

■

Multiple S.A.M. Sockets

240k

180k

TYPICAL APPLICATIO

CARD

DETECT

UNDERV

PRES A

12,13

Deactivation Sequence

BATT

INPUT

POWER

0.1µF

4.7µF

LTC1955

9, 10

C8A

C4A

GND

RST A

5V/DIV

I/O A

FAULT

RST A

CLK A

SMART CARD

CLK A

5V/DIV

4-WIRE

COMMAND

INTERFACE

CCA

OUT

SCLK

1µF

PRES B

I/O A

5V/DIV

DATA

I/O B

RST B

CLK B

CCA

5V/DIV

4-WIRE

CARD

INTERFACE

SYNC

VENDOR CARD

10µs/DIV

1955 G11.eps

ASYNC

NC/NO

CCB

1µF

–

CPO

1955 TA01

4.7µF

1µF

sn1955 1955fs

12 3 4 5 6 7...20

中文翻译

下载PDF

与LTC1955EUH相关器件

型号	品牌	获取价格	描述	数据表
LTC1955EUH#PBF	Linear	获取价格	LTC1955 - Dual Smart Card Interface with Serial Control; Package: QFN; Pins: 32; Temperatu
LTC1955EUH#TR	Linear	获取价格	LTC1955 - Dual Smart Card Interface with Serial Control; Package: QFN; Pins: 32; Temperatu
LTC1955EUH#TRPBF	Linear	获取价格	LTC1955 - Dual Smart Card Interface with Serial Control; Package: QFN; Pins: 32; Temperatu
LTC1955IUH#TRPBF	Linear	获取价格	LTC1955 - Dual Smart Card Interface with Serial Control; Package: QFN; Pins: 32; Temperatu
LTC1957	Linear	获取价格	40MHz to 900MHz Quadrature Demodulator
LTC1957-1	Linear	获取价格	Single/Dual Band RF Power Controllers with 40dB Dynamic Range
LTC1957-1_15	Linear	获取价格	Single/Dual Band RF Power Controllers with 40dB Dynamic Range
LTC1957-1EMS8	Linear	获取价格	Single/Dual Band RF Power Controllers with 40dB Dynamic Range
LTC1957-1EMS8#PBF	Linear	获取价格	LTC1957 - Single/Dual Band RF Power Controllers with 40dB Dynamic Range; Package: MSOP; Pi
LTC1957-2	Linear	获取价格	Single/Dual Band RF Power Controllers with 40dB Dynamic Range

与LTC1955EUH相关文章

SK海力士量产12层HBM3E，容量高达36GB
2024-09-27

6
意法半导体传感器驱动Sphere，开启沉浸式电影新时代
2024-09-27

11
摩尔斯微电子在美国约书亚树国家公园测试 Wi-Fi HaLow
2024-09-18

79
贸泽上架Tallysman TW5386智能GNSS天线
2024-09-18

71

产品中心

服务支持

精选活动

关于我们

帮助中心

LTC1955EUH

LTC1955EUH 数据手册

与LTC1955EUH相关器件

与LTC1955EUH相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LTC1955EUH

LTC1955EUH 数据手册

与LTC1955EUH相关器件

与LTC1955EUH相关文章

您还可以找

您在本页遇到什么问题？