MAX1740EUB+

MAX1740EUB+ Features

(cid:2) SIM/Smart Card Level Shifting(cid:2) ±10kV ESD Card Socket Protection(cid:2) Allows Level Translation with DVCC ≥ VCC orDVCC ≤ VCC(cid:2) Automatically Shuts Down When Either Supply IsRemoved(cid:2) Card Contacts Actively Pulled Low DuringShutdown(cid:2) +1.425V to +5.5V Controller Voltage Range(cid:2) +2.25V to +5.5V Card Voltage Range(cid:2) 2.5µA (max) Total Quiescent Supply Current(cid:2) 0.01µA Total Shutdown Supply Current(cid:2) Ultra-Small 10-Pin µMAX Package(cid:2) Compliant with GSM Test Specifications 11.11and 11.12

MAX1740EUB+ General Description

The MAX1740/MAX1741 subscriber identity module(SIM)/smart card level translators provide level shiftingand electrostatic discharge (ESD) protection for SIM andsmart card ports. These devices integrate two unidirec-tional level shifters for the reset and clock signals, a bidi-rectional level shifter for the serial data stream, and±10kV ESD protection on all card contacts.The MAX1740 includes a SHDN control input to aidinsertion and removal of SIM and smart cards, while theMAX1741 includes a system-side data driver to supportsystem controllers without open-drain outputs. The logicsupply voltage range is +1.425V to +5.5V for the “con-troller side” and +2.25V to +5.5V for the “card side.”Total supply current is 2.5µA max. Both devices automat-ically shut down when either power supply is removed.For a complete SIM-card interface, combine theMAX1740/MAX1741 with the MAX1686H 0V/3V/5V regu-lated charge pump.The MAX1740/MAX1741 are available in ultra-small 10-pin µMAX packages that are only 1.09mm high and halfthe area of an 8-pin SO.The MAX1740/MAX1741 are compliant with GSM testspecifications 11.11 and 11.12.

MAX1740EUB+ Applications