MAX1840EUB+T

The MAX1840EUB+T by Analog Devices / Maxim Integrated is a specialized interface IC designed for SIM and smart card applications. It provides essential level shifting for clock, reset, and serial data signals, ensuring compatibility between system controllers and smart cards.

Key features include ±10kV ESD protection on all card contacts, safeguarding sensitive components from electrostatic discharge. The device supports a wide operating voltage range, with the controller side accepting 1.4V to 5.5V and the card side accepting 1.7V to 5.5V. It integrates unidirectional level shifters for reset and clock, and a bidirectional shifter for data.

This level translator automatically shuts down when either power supply is removed, with card contacts actively pulled low during shutdown. It consumes a low quiescent supply current of 1µA and a shutdown current of 0.01µA. The MAX1840EUB+T is compliant with GSM test specifications 11.11 and 11.12.

Available in an ultra-small 10-pin uMAX package, it is suitable for space-constrained designs. The device supports various serial interfaces including SPI, QSPI, and MICROWIRE, making it versatile for different smart card reader and SIM interface applications in GSM cellular telephones and other portable devices.