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MAX1740

Description
SIM/Smart Card Level Translators in レMAX
File Size327KB,12 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX1740 Overview

SIM/Smart Card Level Translators in レMAX

19-1458; Rev 0; 1/00
SIM/Smart Card Level Translators
in µMAX
General Description
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
±10kV ESD protection on all card contacts.
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 +1.425V to +5.5V for the “con-
troller side” and +2.25V to +5.5V 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 0V/3V/5V regu-
lated charge pump.
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.
The MAX1740/MAX1741 are compliant with GSM test
specifications 11.11 and 11.12.
o
SIM/Smart Card Level Shifting
o
±10kV ESD Card Socket Protection
o
Allows Level Translation with DV
CC
V
CC
or
DV
CC
V
CC
o
Automatically Shuts Down When Either Supply Is
Removed
o
Card Contacts Actively Pulled Low During
Shutdown
o
+1.425V to +5.5V Controller Voltage Range
o
+2.25V to +5.5V Card Voltage Range
o
2.5µA (max) Total Quiescent Supply Current
o
0.01µA Total Shutdown Supply Current
o
Ultra-Small 10-Pin µMAX Package
o
Compliant with GSM Test Specifications 11.11
and 11.12
Features
MAX1740/MAX1741
Applications
SIM Interface in GSM Cellular Telephones
Smart Card Readers
Logic Level Translation
SPI™/QSPI™/MICROWIRE™ Level Translation
PART
MAX1740EUB
MAX1741EUB
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
10 µMAX
10 µMAX
Typical Operating Circuit
DV
CC
DV
CC
DV
CC
RIN
SYSTEM
CONTROLLER
V
CC
RST
V
CC
V
CC
RST
SIM OR
SMART
CARD
Pin Configuration
TOP VIEW
DATA
DV
CC
CIN
RIN
SHDN (DDRV)
1
2
3
4
5
10
IO
9
V
CC
CLK
RST
GND
MAX1740
MAX1741
CIN
DATA
OPTIONAL
OPTIONAL
SHDN*
DDRV*
IO
GND
IO
CLK
CLK
MAX1740
MAX1741
8
7
6
µMAX
( ) ARE FOR MAX1741.
GND
GND
* SHDN FOR MAX1740 ONLY
DDRV FOR MAX1741 ONLY
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
1
________________________________________________________________
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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