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參數(shù)資料
| 型號： | LTC1955EUH |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Dual Smart Card Interface with Serial Control |
| 中文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32 |
| 封裝： | 5 X 5 MM, 0.75 MM HEIGHT, MO-220WHHD, QFN-32 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 259K |
| 代理商： | LTC1955EUH |
LTC1955
1
sn1955 1955fs
APPLICATIU
FEATURES
DESCRIPTIOU
TYPICAL APPLICATIOU
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.
The card voltages can be independently set to 1.8V, 3V or
5V. Both card interfaces include a card detection channel
with automatic debounce circuitry. To reduce wiring costs,
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.
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.
I
Handheld Payment Terminals
I
Pay Telephones
I
ATM Machines
I
POS Terminals
I
Computer Keyboards
I
Multiple S.A.M. Sockets
, LTC and LT are registered trademarks of Linear Technology Corporation.
*U.S. Patent No. 6,411,531
I
Compatible with ISO7816-3 and EMV Electrical
Specifications
I
Power Management and Control for Two Smart
Cards
I
Control/Status Serial Port May be Daisy-Chained
for Multicard Applications
I
Automatic Shutdown on Electrical Faults
I
Buck/Boost Charge Pump Generates 5V, 3V or 1.8V
Outputs (Smart Card Classes A, B and C)*
I
Independent 5V/3V/1.8V Level Control for Both Cards
I
Automatic Level Translation
I
Supervisory Functions Prevent Smart Card Faults
I
Low Operating Current: 250
μ
A Typical
I
Ultralow Shutdown Current
I
>10kV ESD on Smart Card Pins
I
Small 32-Pin 5mm
×
5mm QFN Package
Dual Smart Card Interface
with Serial Control
4-WIRE
COMMAND
INTERFACE
4-WIRE
CARD
INTERFACE
SMART CARD
VENDOR CARD
C8A
C4A
I/O A
RST A
CLK A
V
CCA
PRES B
3
4
5
6
7
8
21
2
CARD
DETECT
23
20
19
18
17
15
11
14
24
1
12,13
9, 10
29
30
32
31
22
27
28
26
25
I/O B
RST B
CLK B
V
CCB
DV
CC
V
BATT
GND
FAULT
D
IN
D
OUT
SCLK
LD
DATA
R
IN
SYNC
ASYNC
NC/NO
C
+
PRES A
UNDERV
240k
LTC1955
1
μ
F
1
μ
F
4.7
μ
F
1955 TA01
1
μ
F
4.7
μ
F
0.1
μ
F
C
–
CPO
180k
INPUT
POWER
RST A
5V/DIV
10
μ
s/DIV
1955 G11.eps
Deactivation Sequence
I/O A
5V/DIV
V
5V/DIV
CLK A
5V/DIV
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1955EUH#PBF | 功能描述:IC INTERFACE DL SMART CARD 32QFN RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:2,450 系列:- 控制器類型:SPI 總線至 I²C 總線橋接 接口:I²C，串行，SPI 電源電壓:2.4 V ~ 3.6 V 電流 - 電源:11mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應商設備封裝:24-HVQFN（4x4） 包裝:托盤 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名稱:935286452157SC18IS600IBSSC18IS600IBS-ND |
| LTC1955EUH#TR | 功能描述:IC SMART CARD INTERFC DUAL 32QFN RoHS:否 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:2,450 系列:- 控制器類型:SPI 總線至 I²C 總線橋接 接口:I²C，串行，SPI 電源電壓:2.4 V ~ 3.6 V 電流 - 電源:11mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應商設備封裝:24-HVQFN（4x4） 包裝:托盤 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名稱:935286452157SC18IS600IBSSC18IS600IBS-ND |
| LTC1955EUH#TRPBF | 功能描述:IC INTERFACE DL SMART CARD 32QFN RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:2,450 系列:- 控制器類型:SPI 總線至 I²C 總線橋接 接口:I²C，串行，SPI 電源電壓:2.4 V ~ 3.6 V 電流 - 電源:11mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應商設備封裝:24-HVQFN（4x4） 包裝:托盤 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名稱:935286452157SC18IS600IBSSC18IS600IBS-ND |
| LTC1955IUH#PBF | 功能描述:IC SMART CARD INTERFACE DL 32QFN RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:2,450 系列:- 控制器類型:SPI 總線至 I²C 總線橋接 接口:I²C，串行，SPI 電源電壓:2.4 V ~ 3.6 V 電流 - 電源:11mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應商設備封裝:24-HVQFN（4x4） 包裝:托盤 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名稱:935286452157SC18IS600IBSSC18IS600IBS-ND |
| LTC1955IUH#TRPBF | 功能描述:IC SMART CARD INTERFACE DL 32QFN RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:2,450 系列:- 控制器類型:SPI 總線至 I²C 總線橋接 接口:I²C，串行，SPI 電源電壓:2.4 V ~ 3.6 V 電流 - 電源:11mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應商設備封裝:24-HVQFN（4x4） 包裝:托盤 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名稱:935286452157SC18IS600IBSSC18IS600IBS-ND |
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