LTC1555CGN#TRPBF

Translators, Level Shifters Overview

The LTC1555CGN#TRPBF is a SIM power supply and level translator in a 16-lead narrow SSOP package. It features a step-up/step-down charge pump DC/DC converter with an input voltage range of 2.7V to 10V. The regulated VCC output provides up to 10mA at VIN ≥ 2.7V or 20mA at VIN ≥ 3V, programmable to 3V or 5V via mode pins. Operating current is 60μA, with shutdown current under 1μA. The device includes 3V to 5V signal level translators for CLK, RST, and I/O interfaces, along with soft start functionality to limit inrush current.

Translators, Level Shifters Feature Summary

• Integrated step-up/step-down charge pump generates regulated 5V or 3V output from a wide input range
• Provides level translation between controller digital signals (DVCC) and SIM interface signals (VCC)
• Includes soft start feature to limit inrush current during turn-on sequences
• Offers very low operating and shutdown currents to maximize battery life

Translators, Level Shifters Applications

• SIM interface circuits in GSM cellular telephones
• Smart card readers requiring level shifting and power generation
• Systems interfacing 3V controllers with 5V Subscriber Identity Modules

Translators, Level Shifters Procurement Notes

Verify the specific CGN suffix indicates the commercial temperature grade and narrow SSOP-16 packaging configuration. Confirm that the #TRPBF designation corresponds to tape and reel delivery format as specified by Analog Devices. Ensure compatibility with system voltage requirements before integration.

Translators, Level Shifters Selection Notes

Select this component when interfacing 3V logic controllers with 5V SIM cards. It is suitable for applications requiring minimal external components due to the integrated charge pump and level shifters. Consider the LTC1556 if an auxiliary LDO output is needed for additional circuitry powering.

Translators, Level Shifters Part Context

This part belongs to the LTC1555/LTC1556 family designed specifically for mobile communication devices. It addresses the dual requirement of powering SIM cards and translating logic levels between different voltage domains within compact form factors typical of handheld electronics.

Translators, Level Shifters Replacement Considerations

LTC1555IGN#TRPBF offers the same electrical specifications but supports an extended industrial temperature range (-40°C to 85°C) compared to the commercial grade of the CGN variant.