© Semiconductor Components Industries, LLC, 2006

June, 2006 − Rev. 0

1

Publication Order Number:

NCN4557/D

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 to a built−in sequencer, the

device enables automatic activation and deactivation. Through the

ENABLE pin a low current shutdown mode can be activated

extending the battery life.

The card power supply voltage (1.8 V or 3.0 V) and the card socket

A or B are selected using two dedicated pins (SEL0 & SEL1).

Features

3.0 V

CRD_IOA/B Pins in Both Directions

Specifications – ESD Protection on Card Pins in Excess of 8.0 kV

(JEDEC HBM)

Applications

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques Reference

Manual, SOLDERRM/D.

QFN16

MT SUFFIX

CASE 488AK

http://onsemi.com

MARKING

DIAGRAM

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G or

G

= Pb−Free Package

16

NCN

4557

ALYWG

1

See detailed ordering and shipping information in the package

dimensions section on page 11 of this data sheet.

ORDERING INFORMATION

1