MAX1740EUB

Specialized Overview

The MAX1740EUB is a SIM and smart card level translator manufactured by Analog Devices Inc./Maxim Integrated. It provides level shifting and electrostatic discharge (ESD) protection for SIM and smart card ports, integrating two unidirectional level shifters for reset and clock signals, and one bidirectional level shifter for the serial data stream. The device features ±10kV ESD protection on all card contacts. The logic supply voltage range is +1.425V to +5.5V for the controller side and +2.25V to +5.5V for the card side. Total supply current is 2.5µA max. Both devices automatically shut down when either power supply is removed. For a complete SIM-card interface, combine the MAX1740/MAX1741 with the MAX1686H 0V/3V/5V regulated charge pump.

Specialized Feature Summary

• SIM/Smart Card Level Shifting
• ±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
• +1.425V to +5.5V Controller Voltage Range
• +2.25V to +5.5V Card Voltage Range
• 2.5µA (max) 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

Specialized Applications

• SIM Interface in GSM Cellular Telephones
• Smart Card Readers
• Logic Level Translation
• SPI/QSPI/MICROWIRE Level Translation

Specialized Procurement Notes

Verify the exact part number MAX1740EUB against official Analog Devices documentation to ensure compatibility with your specific application requirements. Confirm that the package type and temperature range match your design specifications. Always refer to the latest datasheet for any updates or changes to the product specifications.

Specialized Selection Notes

When selecting the MAX1740EUB, consider the voltage levels of both the controller and card sides to ensure proper level translation. Ensure that the ESD protection meets the requirements of your application. Verify the package size and pin configuration to fit your PCB layout constraints. Check the operating temperature range to ensure it aligns with your environmental conditions.

Specialized Part Context

The MAX1740EUB is part of the MAX1740/MAX1741 family of SIM/smart card level translators. These devices are designed to provide robust level shifting and ESD protection for SIM and smart card interfaces. They are commonly used in mobile phones, smart card readers, and other applications requiring reliable communication between different voltage domains.

Specialized Replacement Considerations

Public confirmed substitute part numbers: MAX1741EUB+.

Specialized FAQ

What is the maximum ESD protection rating of the MAX1740EUB?

The MAX1740EUB provides ±10kV ESD protection on all card contacts according to the Human Body Model.

Can the MAX1740EUB be used for SPI/QSPI/MICROWIRE level translation?

Yes, the MAX1740EUB can be used as a level shifter for SPI, QSPI, and MICROWIRE interfaces.

What happens to the card-side pins during shutdown mode?

During shutdown mode, the CLK, RST, and IO pins are actively pulled low, and the internal 10kΩ pull-up resistor from VCC is disconnected to prevent excessive current draw.