MIC4555_11 Datasheet, PDF (1/16 Pages) Micrel Semiconductor – SIM Card Level Shifter with 50mA LDO

MIC4555
SIM Card Level Shifter with 50mA LDO
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.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
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
____________________________________________________________________________________________________________
Typical Application
Typical SIM/SMART CARD Interface
MLF and MicroLead Frame are registered trademark Amkor Technology Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
September 2011
M9999-092311-B