MAX1840 Maxim, MAX1840 Datasheet
MAX1840
Manufacturer Part Number
MAX1840
Description
Low-Voltage SIM/Smart Card Level Translators in MAX
Manufacturer
Maxim
Datasheet
1.MAX1840.pdf
(8 pages)
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The MAX1840/MAX1841 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 MAX1840 includes a SHDN control input to aid
insertion and removal of SIM and smart cards, while the
MAX1841 includes a system-side data driver to support
system controllers without open-drain outputs. The logic
supply voltage range is +1.4V to +5.5V for the “controller
side” and +1.7V to +5.5V for the “card side.” Total sup-
ply current is 1.0µA. Both devices automatically shut
down when either power supply is removed. For a com-
plete SIM card interface, combine the MAX1840/
MAX1841 with the MAX1686H 0V/3V/5V regulated
charge pump.
The MAX1840/MAX1841 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 MAX1840/MAX1841 are compliant with GSM test
specifications 11.11 and 11.12.
19-1716; Rev 0; 4/00
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.
SIM Interface in GSM Cellular Telephones
Smart Card Readers
Logic Level Translation
SPI™/QSPI™/MICROWIRE™ Level Translation
CONTROLLER
SYSTEM
DV
GND
CC
OPTIONAL
OPTIONAL
DV
Typical Operating Circuit
CC
________________________________________________________________ Maxim Integrated Products
*
DV
RIN
CIN
DATA
DDRV*
SHDN FOR MAX1840 ONLY;
DDRV FOR MAX1841 ONLY.
SHDN*
General Description
CC
MAX1840
MAX1841
CLK
GND
RST
V
IO
CC
Applications
V
CC
CLK
IO
GND
V
RST
CC
Low-Voltage SIM/Smart Card
SIM OR
SMART
CARD
Level Translators in µMAX
o SIM/Smart Card Level Shifting
o +1.4V to +5.5V Controller Voltage Range
o +1.7V to +5.5V Card Voltage Range
o ±10kV ESD Card Socket Protection
o Allows Level Translation with DV
o Automatically Shuts Down When Either Supply Is
o Card Contacts Actively Pulled Low During
o 1µA 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
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
MAX1840EUB
MAX1841EUB
DV
Removed
Shutdown
and 11.12
( ) ARE FOR MAX1841.
TOP VIEW
CC
PART
≤ V
SHDN (DDRV)
CC
DATA
DV
CIN
RIN
CC
4
5
TEMP. RANGE
1
2
3
-40°C to +85°C
-40°C to +85°C
Ordering Information
MAX1840
MAX1841
µMAX
Pin Configuration
10
9
8
7
6
CC
IO
V
CLK
RST
GND
10 µMAX
10 µMAX
PIN-PACKAGE
CC
≥ V
Features
CC
or
1
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