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參數(shù)資料
型號: LTC1555LEGN-1.8#TR
廠商: Linear Technology
文件頁數(shù): 1/8頁
文件大小: 0K
描述: IC LEVEL XLATOR/SIM PS 16SSOP
標(biāo)準(zhǔn)包裝: 2,500
邏輯功能: 電平移位器
位數(shù): 1
輸入類型: 電壓
輸出類型: 電壓
通道數(shù): 1
輸出/通道數(shù)目: 1
差分 - 輸入:輸出: 無/無
傳輸延遲(最大): 18ns
電源電壓: 1.8 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 16-SSOP
包裝: 帶卷 (TR)
其它名稱: LTC1555LEGN-1.8TR
LTC1555L-1.8
1
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
The LTC
1555L-1.8 provides power conversion and level
shifting needed for low voltage GSM and WCDMA cellular
telephones to interface with either 1.8V, 3V or 5V sub-
scriber identity modules (SIMs). The part contains a
patented buck/boost charge pump DC/DC converter* that
delivers a regulated VCC supply voltage to the SIM card.
Input voltage may range from 2.6V to 6V allowing direct
connection to the battery. The output voltage may be
programmed to 1.8V, 3V, 5V or direct connection to the
VIN pin.
Internal level translators allow controllers operating with
supplies as low as 1.425V to interface with 1.8V, 3V and
5V SIMs. A soft-start feature limits inrush current at turn-
on, mitigating start-up problems that may result when the
input is supplied by another low-power DC/DC converter.
Battery life is maximized by 32
A operating current, and
1
A shutdown current. Board area is minimized by the
miniature 16-pin narrow SSOP packages and the need for
only three small external capacitors.
s
SIM Interface in GSM Cellular Telephones
s
WCDMA SIM Interface
s
Smart Card Readers
, LTC and LT are registered trademarks of Linear Technology Corporation.
SIM Power Supply and
Level Translator
s
Buck/Boost Charge Pump Generates 1.8V, 3V or 5V
s
Input Voltage Range: 2.6V to 6V
s
Controller VCC Range: 1.425V to 4.4V
s
>10kV ESD on All SIM Contact Pins
s
Short-Circuit and Overtemperature Protected
s
Meets all ETSI and IMT-2000 SIM Interface
Requirements
s
1.8V to 5V Signal Level Translators
s
Very Low Operating Current: 32
A
s
Very Low Shutdown Current: <1
A
s
Soft-Start Limits Inrush Current at Turn-On
s
1MHz Switching Frequency
s
Available in 16-Pin Narrow SSOP Package
GSM Cellular Telephone SIM Interface
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CIN
RIN
DATA
DDRV
DVCC
M2
M1
M0
CLK
RST
I/O
VCC = 1.8V,3V,5V
IVCC = 10mA
GND
CLK
RST
I/O
VCC
VIN
C1+
C1
GND
0.1
F
1
F
LTC1555L-1.8
GSM
CONTROLLER
SIM
VIN
2.6V TO 6V
1.425V TO 4.4V
2.2
F
1555L TA01
VCC
*U.S. Patent No.: 5,973,944
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