NCN4557 Datasheet (ON Semiconductor) - Dual SIM/SAM/Smart Card Power Supply and Level Shifter

NCN4557, Dual SIM/SAM/Smart Card Power Supply and Level Shifter

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 active when CRD_VCCA is active and conversely.

NCN4557 1.8 V/3.0 V Dual SIM/SAM/ Smart Card Power Supply and Level Shifter The NCN4557 is a dual interface analog circuit designed to translate the voltages between SIM, SAM or Smart Cards and a microcontroller (or similar control device).

It integrates two LDOs for power conversion and three level shifters per channel allowing the management of two independent chip cards.

The device fulfills the ISO7816 and EMV smart card interface requirements as well as the GSM and 3G mobile standard.

Due t

NCN4557 Features

* 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 Pullup Resistor for I/O and CRD_IOA/B Pins in Both Directions

* All Pins are Fully ESD Protected According