The MAX1740/MAX1741 subscriber identity module (SIM)/smart card level translators provide level shifting and electrostatic discharge (ESD) protection for SIM and smart card ports. These devices integrate two unidirectional level shifters for the reset and clock signals, a bidirectional level shifter for the serial data stream, and ±10kV ESD protection on all card contacts. The MAX1740 includes a SHDN control input to aid insertion and removal of SIM and smart cards, while the MAX1741 includes a system-side data driver to support system controllers without open-drain outputs. The logic supply voltage range is +1.425V to +5.5V for the “controller side” and +2.25V to +5.5V for the “card side.” Total supply current is 2.5µA max. Both devices automatically shut down when either power supply is removed. For a complete SIM-card interface, combine the MAX1740/MAX1741 with the MAX1686H 0V/3V/5V regulated charge pump. The MAX1740/MAX1741 are available in ultra-small 10-pin µMAX packages that are only 1.09mm high and half the area of an 8-pin SO. The MAX1740/MAX1741 are compliant with GSM test specifications 11.11 and 11.12.
The MAX1740/MAX1741 devices provide level shifting and ±10 kV ESD protection for SIM and smart‑card interfaces. They include two unidirectional shifters for reset and clock, a bidirectional shifter for data, and optional shutdown control.
The parts are offered in an ultra‑small 10‑pin µMAX package (1.09 mm high) and operate from +1.425 V to +5.5 V on the controller side and +2.25 V to +5.5 V on the card side, with a maximum supply current of 2.5 µA and a shutdown current of 0.01 µA.
| Controller side supply voltage range | +1.425 V to +5.5 V |
|---|---|
| Card side supply voltage range | +2.25 V to +5.5 V |
| Maximum total supply current | 2.5 µA max |
| Package type | 10‑pin µMAX, 1.09 mm high, no exposed pad |
| Digital input low threshold (VIL) | 0.2·DVCC |
| Digital input high threshold (VIH) | 0.7·DVCC |
The maximum total supply current is 2.5 µA.
They are offered in a 10‑pin µMAX package that is 1.09 mm high and has no exposed pad.