NCN4557 shifter equivalent, dual sim/sam/smart card power supply and level shifter.
* Supports 1.8 V or 3.0 V Operating SIM/SAM/Smart Cards
* The LDOs are able to Supply more than 50 mA Under 1.8 V and
3.0 V
* Built−in Active and Passive Pull.
* SIM Card Interface Circuit for 2G, 2.5G and 3G Mobile Phones
* Wireless PC/Laptop Cards (PCMCIA Cards)
* P.
PIN
Name
Type
Description
1 CRD_VCCB POWER This pin is connected to the Card power supply pin (C1) (Card B).The corresponding LDO is programmable using the pins SEL0, SEL1 and ENABLE to provide 1.8 V, 3.0 V or 0 V (disable).
CRD_VCCB can not be.
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