General Description
The MIC4555 is a digital level shifter with a 50mA LDO for SIM card interfaces. There are three high-speed level shifters for SIM card signal translation. The level shifters are designed to support high-speed clocking up to 5MHz. The 50mA LDO provides power for the SIM Card to eliminate the need for a separate power device. This simplifies the design of the SIM card interface. The MIC4555 is available in a tiny, lead-free, 16-pin MLF® package (3mm x 3mm), and is specified to operate from −40°C to +125°C junction temperature.

FEATUREs
• Powers 1.8V or 3V SIM up to 50mA
• Input voltage 2.7V to 5.5V
• Controller voltage 1.6V to 5.5V
• Supports clock rates greater than 5MHz
• 8kV ESD protection on SIM contact pins
• 16-pin 3mm x 3mm MLF® package
• −40°C to +125°C junction temperature range

APPLICATIONs
• SIM card interface for 3G/4G systems
• Wireless PC cards
• Smart card readers