LTC4557EUD

更新时间： 2024-09-23 22:51:47

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
12页	222K
描述
Dual SIM/Smart Card Power Supply and Interface

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中文翻译

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数据手册

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LTC4557EUD 数据手册

LTC4557

Dual SIM/Smart Card

Power Supply and Interface

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 V_CCControl 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-L}U^{ead (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

TYPICAL APPLICATIO

BATT

1.2V TO 4.4V 3V TO 6V

0.1µF

Deactivation Sequence

BATT

I/OA

CLKIN

RSTIN

DATA

I/O

RSTX

RSTA

CLKA

RST

CLK

1.8V/3V

SIM

5V/DIV

CARD

CLKX

5V/DIV

CCA

GND

µCONTROLLER

LTC4557

1µF

GND

I/OX

5V/DIV

CCX

CCB

2V/DIV

ENABLE

CLKB

CLK

RST

I/O

1.8V/3V

SMART

CARD

4557 G07

= 1µF

10µs/DIV

VCCX

RSTB

I/OB

GND

4557 TA01

4557f

12 3 4 5 6 7...12

中文翻译

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与LTC4557EUD相关器件

型号	品牌	获取价格	描述	数据表
LTC4557EUD#PBF	Linear	获取价格	LTC4557 - Dual SIM/Smart Card Power Supply and Interface; Package: QFN; Pins: 16; Temperat
LTC4557EUD#TR	Linear	获取价格	LTC4557 - Dual SIM/Smart Card Power Supply and Interface; Package: QFN; Pins: 16; Temperat
LTC4557EUD#TRPBF	Linear	获取价格	LTC4557 - Dual SIM/Smart Card Power Supply and Interface; Package: QFN; Pins: 16; Temperat
LTC4558	Linear	获取价格	Dual SIM/Smart Card Power Supply and Interface
LTC4558	ADI	获取价格	双 SIM 卡 / 智能卡电源和接口
LTC4558EUD	Linear	获取价格	Dual SIM/Smart Card Power Supply and Interface
LTC4558EUD#PBF	Linear	获取价格	LTC4558 - Dual SIM/Smart Card Power Supply and Interface; Package: QFN; Pins: 20; Temperat
LTC4558EUD#TR	Linear	获取价格	IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20, 3 X 3 MM, 0.75 MM HEIGHT, PLASTIC, QFN-20,
LTC4558EUD#TRPBF	Linear	获取价格	LTC4558 - Dual SIM/Smart Card Power Supply and Interface; Package: QFN; Pins: 20; Temperat
LTC455BU	TOKEN	获取价格	Chip Ceramic Filters for Communication

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