MAX1841:Low-Voltage SIM/Smart-Card Level Translators in µMAX

Low-Voltage, High-Speed, SIM/Smart-Card Level Translator

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 unidirectional level shifters for the reset and clock signals, a bidirectional 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 supply current is 1.0µA. Both devices automatically shut down when either power supply is removed. For a complete 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.

Key Features
  • SIM/Smart Card Level Shifting
  • +1.4V to +5.5V Controller Voltage Range
  • +1.7V to +5.5V Card Voltage Range
  • ±10kV ESD Card Socket Protection
  • Allows Level Translation with DVCC > VCC or DVCC < VCC
  • Automatically Shuts Down When Either Supply Is Removed
  • Card Contacts Actively Pulled Low During Shutdown
  • 1µA Total Quiescent Supply Current
  • 0.01µA Total Shutdown Supply Current
  • Ultra-Small 10-Pin µMAX Package
  • Compliant with GSM Test Specifications 11.11 and 11.12
MAX1840, MAX1841: Typical Operating Circuit
MAX1840, MAX1841: Typical Operating Circuit
Applications/Uses
  • Logic-Level Translation
  • SIM Interface in GSM Cellular Telephones
  • Smart Card Readers
  • SPI™, QSPI™, and MICROWIRE™ Level Translation
DataSheet
titleDownload file
MAX1840-MAX1841 Data SheetMAX1840-MAX1841.pdf
Parametrics
Part NumberVCC
(V)
VCC
(V)
ICCQ
(µA)
Level ShiftersPackage/PinsOper. Temp.
(°C)
Budgetary
Price
LogicCardmaxSee Notes
MAX18401.4 to 5.51.7 to 5.53.51 Bidirectional
2 Unidirectional
µMAX/10-40 to +85$1.55 @1k
MAX1841µMAX/10-
Related Products
  • MAX1740:SIM/Smart-Card Level Translators in µMAX
  • MAX1741:SIM/Smart-Card Level Translators in µMAX
  • MAX1686:3V to 5V Regulating Charge Pumps for SIM Cards
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1841EUBNo Longer AvailableMAX1841EUB+µMAX,;10 pin;15.4 mm²-40°C to +85°CNo
MAX1841EUB+ActiveµMAX,;10 pin;15.4 mm²-40°C to +85°CLead Free
MAX1841EUB+TActiveuMAX;10 pin-40°C to +85°CSee data sheet
MAX1841EUB-TNo Longer AvailableMAX1841EUB+TµMAX,;10 pin;15.4 mm²-40°C to +85°CNo
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