MAX1841EUB+

Specialized Overview

The MAX1841EUB+ is a low-voltage 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, integrating two unidirectional shifters for reset/clock and one bidirectional shifter for data. The controller-side supply (DVCC) ranges from +1.4V to +5.5V, while the card-side supply (VCC) ranges from +1.7V to +5.5V. Total operating current is 1.0µA, dropping to 0.01µA in shutdown. It features a system-side data driver (DDRV) for non-open-drain controllers and automatically shuts down when power is removed.

Specialized Feature Summary

• Integrates unidirectional level shifters for clock/reset and a bidirectional shifter for serial data streams
• Includes a dedicated system-side data driver (DDRV) to support system controllers lacking open-drain outputs
• Provides ±10kV electrostatic discharge (ESD) protection on all card contacts
• Automatically enters shutdown mode when either power supply is removed, actively pulling card contacts low

Specialized Applications

• SIM interface in GSM cellular telephones
• Smart card readers
• Logic level translation for SPI/QSPI/MICROWIRE interfaces

Specialized Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or official Maxim Integrated channels. Confirm the specific ordering suffix matches the required package and temperature range. Request original manufacturer datasheets and compliance documentation to ensure the part meets GSM specifications 11.11 and 11.12 before integration into production designs.

Specialized Selection Notes

Select the MAX1841EUB+ over the MAX1840 variant when the host system controller lacks an open-drain output, as the MAX1841 includes the necessary DDRV pin for push-pull data transmission. Ensure the design accommodates the DVCC range of 1.4V to 5.5V and VCC range of 1.7V to 5.5V. Verify that the application requires the specific bidirectional data handling capabilities provided by this integrated translator.

Specialized Part Context

The MAX1841EUB+ belongs to the MAX1840/MAX1841 family of low-voltage SIM/smart card level translators manufactured by Analog Devices/Maxim Integrated. These devices are designed specifically for multivoltage systems requiring robust interface translation between system controllers and SIM/smart card modules while maintaining low power consumption and high ESD resilience.

Specialized Replacement Considerations

The MAX1840EUB+ serves as a direct functional substitute if the system controller utilizes open-drain outputs, eliminating the need for the DDRV input. Both parts share identical pinouts, packages, and electrical characteristics except for the data driver feature.