NCN4555
1.
8V / 3V SIM Card Power Supply and Level Shifter
The NCN4555 is a level shifter analog circuit designed to translate the
voltages between a SIM Card and an external microcontroller or MPU.
A built−in LDO−type DC−DC converter makes the NCN4555 useable to drive 1.
8 V and 3.
0 V SIM card.
The device fulfills the ISO7816−3 smart card interface standard as well as GSM 11.
11 and related (11.
12 and 11.
18) and 3G mobile requirements (IMT−2000/3G UICC standard).
With the STOP pin a low current shutdown mode can be activated making the battery life longer.
The Card power supply
voltage (SIM_VCC) is selected using a single pin (MOD_VCC).
Features
• Supports 1.
8 V or 3.
0 V Operating SIM Card • ...