MAX1740EUB+

Specialized Overview

The MAX1740EUB+ is a SIM/smart card level translator in a 10-pin µMAX package. It provides level shifting and ±10kV ESD protection for SIM and smart card ports. The device integrates two unidirectional level shifters for reset and clock signals, and a bidirectional level shifter for the serial data stream. The logic supply voltage range is +1.425V to +5.5V for the controller side (DVCC) and +2.25V to +5.5V for the card side (VCC). Total supply current is 2.5µA max. Both devices automatically shut down when either power supply is removed.

Specialized Feature Summary

• Provides level shifting and electrostatic discharge (ESD) protection for SIM and smart card ports
• Integrates two unidirectional level shifters for reset and clock signals, and a bidirectional level shifter for the serial data stream
• Includes ±10kV ESD protection on all card contacts
• Automatically shuts down when either power supply is removed

Specialized Applications

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

Specialized Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for end-of-life notifications as this product may be discontinued. Ensure proper handling procedures are followed due to the ultra-small package size and sensitivity to electrostatic discharge during installation.

Specialized Selection Notes

Select the MAX1740EUB+ when system controllers lack open-drain outputs and require a shutdown control input for SIM insertion and removal. Verify that the DVCC range of 1.425V to 5.5V and VCC range of 2.25V to 5.5V match the application requirements. Consider the MAX1741 variant if an internal data driver is needed instead of a shutdown pin.

Specialized Part Context

The MAX1740EUB+ belongs to the MAX1740/MAX1741 family of subscriber identity module (SIM)/smart card level translators manufactured by Analog Devices Inc./Maxim Integrated. These devices are designed to interface multivoltage systems with SIM and smart cards, providing necessary level translation and protection in a compact 10-pin µMAX package.

Specialized Replacement Considerations

The MAX1741EUB+ is a functional substitute within the same family, differing primarily by including a system-side data driver (DDRV) instead of a SHDN control input.