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MAX1741

更新时间： 2024-11-13 22:57:59
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美信 - MAXIM /
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12页 328K
描述
SIM/Smart Card Level Translators in レMAX

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MAX1741 数据手册

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19-1458; Rev 0; 1/00  
SIM/Smart Card Level Translators  
in µMAX  
General Description  
Features  
The MAX1740/MAX1741 subscriber identity module  
(SIM)/smart card level translators provide level shifting  
and electrostatic discharge (ESD) protection for SIM and  
smart card ports. These devices integrate two unidirec-  
tional level shifters for the reset and clock signals, a bidi-  
rectional level shifter for the serial data stream, and  
10kꢀ ESD protection on all card contacts.  
ꢀ SIM/Smart Card Level Shifting  
ꢀ ±±10k ꢀSꢁ Card Sꢂo0et ꢃrꢂteotiꢂn  
ꢀ Allꢂws Level Translatiꢂn with ꢁk  
≥ k  
ꢂr  
CC  
CC  
ꢁk  
≤ k  
CC  
CC  
ꢀ Autꢂmatioally Shuts ꢁꢂwn When ꢀither Supply Is  
Remꢂved  
The MAX1740 includes a SHDN control input to aid  
insertion and removal of SIM and smart cards, while the  
MAX1741 includes a system-side data driver to support  
system controllers without open-drain outputs. The logic  
supply voltage range is +1.425ꢀ to +5.5ꢀ for the “con-  
troller side” and +2.25ꢀ to +5.5ꢀ for the “card side.”  
Total supply current is 2.5µA max. Both devices automat-  
ically shut down when either power supply is removed.  
For a complete SIM-card interface, combine the  
MAX1740/MAX1741 with the MAX1686H 0ꢀ/3ꢀ/5ꢀ regu-  
lated charge pump.  
ꢀ Card Cꢂntaots Aotively ꢃulled Lꢂw ꢁuring  
Shutdꢂwn  
ꢀ +±.425k tꢂ +5.5k Cꢂntrꢂller kꢂltage Range  
ꢀ +2.25k tꢂ +5.5k Card kꢂltage Range  
ꢀ 2.5µA (max) Tꢂtal Quiesoent Supply Current  
ꢀ 1.1±µA Tꢂtal Shutdꢂwn Supply Current  
ꢀ Ultra-Small ±1-ꢃin µMAX ꢃao0age  
ꢀ Cꢂmpliant with GSM Test Speoifioatiꢂns ±±.±±  
The MAX1740/MAX1741 are available in ultra-small 10-  
pin µMAX packages that are only 1.09mm high and half  
the area of an 8-pin SO.  
and ±±.±2  
The MAX1740/MAX1741 are compliant with GSM test  
specifications 11.11 and 11.12.  
Applications  
Ordering Information  
SIM Interface in GSM Cellular Telephones  
ꢃART  
TꢀMꢃ. RANGꢀ  
-40°C to +85°C  
-40°C to +85°C  
ꢃIN-ꢃACKAGꢀ  
10 µMAX  
MAX±741EUB  
MAX±74±EUB  
Smart Card Readers  
10 µMAX  
Logic Level Translation  
SPI™/QSPI™/MICROWIRE™ Level Translation  
Typical Operating Circuit  
Pin Configuration  
DV  
V
CC  
CC  
TOP VIEW  
V
V
CC  
CC  
DV  
DV  
CC  
CC  
DATA  
DV  
1
2
3
4
5
10 IO  
RIN  
RST  
RST  
SIM OR  
9
8
7
6
V
CC  
CC  
CIN  
RIN  
CLK  
RST  
GND  
MAX1740  
MAX1741  
SYSTEM  
CONTROLLER  
MAX1740  
MAX1741  
SMART  
CARD  
CLK  
CLK  
CIN  
SHDN (DDRV)  
DATA  
SHDN*  
DDRV*  
µMAX  
OPTIONAL  
OPTIONAL  
( ) ARE FOR MAX1741.  
IO  
IO  
GND  
GND  
GND  
SPI and QSPI are trademarks of Motorola, Inc.  
MICROWIRE is a trademark of National Semiconductor Corp.  
*
SHDN FOR MAX1740 ONLY  
DDRV FOR MAX1741 ONLY  
________________________________________________________________ Maxim Integrated Products  
±
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.  
For small orders, phone 1-800-835-8769.  
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